CN110205623B - Mechanical galvanizing process for high-strength steel nail without using sulfuric acid, hydrochloric acid and phosphoric acid - Google Patents
Mechanical galvanizing process for high-strength steel nail without using sulfuric acid, hydrochloric acid and phosphoric acid Download PDFInfo
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- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1806—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by mechanical pretreatment, e.g. grinding, sanding
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1824—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment
- C23C18/1827—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment only one step pretreatment
- C23C18/1834—Use of organic or inorganic compounds other than metals, e.g. activation, sensitisation with polymers
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- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/38—Coating with copper
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C24/00—Coating starting from inorganic powder
- C23C24/02—Coating starting from inorganic powder by application of pressure only
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- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/023—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only
- C23C28/025—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material only coatings of metal elements only with at least one zinc-based layer
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Abstract
The high-strength steel nail-shooting mechanical galvanizing process does not use sulfuric acid, hydrochloric acid and phosphoric acid, inorganic acids such as sulfuric acid, hydrochloric acid and phosphoric acid are not used in the production process, the acid pollution to the environment is reduced, and the industrial system evaluation of raw materials formed by the formula belongs to nontoxic raw materials and meets the environmental protection limitation requirements of some administrative regions. In the production process, sulfuric acid, hydrochloric acid and phosphoric acid are not added, so that the mechanical galvanizing of the high-strength steel nail is prevented from being influenced by invasion of hydrogen embrittlement and phosphorus embrittlement, and a positive inhibiting effect is achieved. Activating, connecting copper plating and connecting mechanical zinc plating from the surface of the shot nail, and mutually associating an activator, a copper plating solution and a zinc plating accelerant, so that the quality of the mechanical zinc plating coating of the high-strength steel shot nail can stably meet the specific requirements of users and meet the technical Specification and test method of the technical standard GB/T26106-2010 mechanical zinc plating coating and the quality requirement of the mechanical zinc plating technical standard acceptance coating of the technical standard ISO 12683:2004 mechanical plated coatings of zinc-Specification and test methods.
Description
Technical Field
The invention belongs to the field of mechanical galvanizing processing technology, and particularly relates to a high-strength steel nail shooting mechanical galvanizing process without using sulfuric acid, hydrochloric acid and phosphoric acid.
Background
As is known, the mechanical plating process can avoid the hydrogen embrittlement harm to high-strength steel parts, but the mechanical plating process also forms a surface protection coating of the plated part by rotating a bearing part roller and transferring energy through a glass bead impact medium under the condition of existence of chemical acidity, and in the process, the coating and the shallow surface layer of the steel part are still more or less clamped with the retention and diffusion of hydrogen gas to cause the hydrogen embrittlement phenomenon existing in the shallow surface layer of the part. However, in the process of leaving the steel plate for 48 hours after plating at normal temperature and normal pressure, the stagnant hydrogen gas can naturally overflow, and the damage of hydrogen embrittlement to the high-strength steel parts can be avoided. In practice, for example, high-strength steel and elastic elements, the hydrogen embrittlement and fracture phenomena of parts of the high-strength steel and the elastic elements are sometimes detected after mechanical galvanizing is finished, but the hydrogen embrittlement and fracture phenomena disappear after the high-strength steel and the elastic elements are placed for 48 hours, and the coating formed by the mechanical galvanizing without power supply has the advantage function of avoiding the hydrogen embrittlement.
In the production process of the current high-strength steel nail-shooting mechanical galvanizing process, sulfuric acid, hydrochloric acid and phosphoric acid are usually added and used in a small amount, the strong acid has strong hydrogen permeation effect on a shallow coating of mechanical galvanizing, and meanwhile, the production application of the strong acid is environmentally-friendly and has administrative limitation.
Disclosure of Invention
In order to solve the technical problem, the invention provides a mechanical galvanizing process for a high-strength steel nail without using sulfuric acid, hydrochloric acid and phosphoric acid.
A high-strength steel nail-shooting mechanical galvanizing process without using sulfuric acid, hydrochloric acid and phosphoric acid comprises the following steps:
firstly, mechanically polishing the lower surface of a nail shooting line, wherein the mechanical polishing depends on rolling mechanical friction impact between shooting nails to remove a quenching oxidation film on the surface of the shooting nails;
secondly, after finishing the surface roll finishing treatment of the shot nail, putting the shot nail into a mechanical galvanizing roller to carry out mechanical galvanizing process production operation;
thirdly, cleaning and activating the surface of the shot nail, and adding an activating agent liquid and glass beads to carry out deep treatment of rolling friction cleaning on the surface of the shot nail;
fourthly, cleaning and removing trace waste liquid hung on the surface of the injection nail;
fifthly, a chemical copper plating process, namely adding chemical copper plating solution and water, and uniformly plating a metal copper plating layer on the surface of the nail by rolling, rubbing and colliding;
sixthly, cleaning and removing trace chemical copper plating waste liquid hung on the surface of the nail;
seventhly, performing mechanical galvanizing, adding an accelerant liquid and zinc powder according to the specific required thickness of the coating, and alternately adding the two raw materials to finish the plating process of generating the coating by mechanical galvanizing;
eighthly, cleaning and removing the zinc-plated trace waste liquid hung on the surface of the nail;
and step nine, performing post-plating treatment, namely soaking the plated nail in hot water of more than 80 ℃ and performing centrifugal drying to enable the surface of the nail to reach a rapidly dried state, so that the plating layer can keep bright and does not change color.
Furthermore, the amount of zinc powder and the amount of promoter liquid required to be added in the step 7 are respectively metered into 10 equal parts, the 2 equal parts are alternatively added, one part of promoter liquid with the total amount of 1/10 is added, then one part of zinc powder with the total amount of 1/10 is added, the alternative addition is repeated, each time is 3 minutes and is accompanied with the rotation of the roller, the whole process is 10 times, and the time is 30 minutes, so that the production thickening process of the mechanical galvanized coating is completed.
Furthermore, the glass beads in the third step adopt 5 kinds of glass beads with different diameters, and the diameters of the 5 kinds of glass beads are 0.5-6 mm.
Further, the activator liquid is composed of an organic acid combination, a surfactant, inorganic salt chloride and water, and specifically comprises: 10-15% of tartaric acid, 13-18% of citric acid, 0.3-1% of sodium alkyl sulfonate, 3-7% of sodium chloride and 0.4% of NNO-dispersing agent.
Further, the electroless copper plating solution is composed of an organic acid composition, a copper salt, an inorganic chloride and a surfactant, and specifically comprises: 13-20% of copper sulfate, 3-5% of tartaric acid, 20-40% of citric acid, 3-7% of sodium chloride and 0.3-1% of sodium alkyl sulfonate.
Further, the accelerator described in the seventh step consisted of 13000 ml of accelerator liquid used as standard, with a combination of organic acids and nonionic surfactant, wetting agent, dispersant, inorganic compound and water.
Further, the accelerator standards were calculated according to 13000 ml initiator liquid application composition formula: tartaric acid: 2-5%, citric acid: 3-6%, polyethylene glycol molecular weight 8000-: 1%, sodium alkyl benzene sulfonate: 0.1-0.3%, sodium methylene bis-naphthalene sulfonate: 0.1-0.3%, penetrant JFC: 0.05-0.1%, stannous sulfate: 0.5-1%, stannous chloride: 0.6-1.2%, zinc sulfate: 0.1 to 1 percent.
The invention provides a high-strength steel nail-shooting mechanical galvanizing process without using sulfuric acid, hydrochloric acid and phosphoric acid, inorganic acids such as sulfuric acid, hydrochloric acid and phosphoric acid are not used in the production process, so that the acid pollution to the environment is reduced, and the industrial system evaluation of raw materials formed by the formula belongs to nontoxic raw materials and meets the environmental protection limitation requirements of some administrative regions. In the production process, sulfuric acid, hydrochloric acid and phosphoric acid are not added, so that the mechanical galvanizing of the high-strength steel nail is prevented from being influenced by invasion of hydrogen embrittlement and phosphorus embrittlement, and a positive inhibiting effect is achieved. The high-strength steel nail shooting mechanical galvanizing process without using sulfuric acid, hydrochloric acid and phosphoric acid is a complete and related coherent operation process system, and comprises the steps of activating the surface of a nail shooting, connecting copper plating and connecting mechanical galvanizing, wherein an activator, a copper plating solution and a galvanizing accelerant are mutually correlated, and as a result, the quality of a galvanized coating of the high-strength steel nail shooting mechanical galvanizing coating can be ensured to stably meet specific requirements of users and meet the technical Specification and test method of the mechanical galvanizing coating in technical standards GB/T26106 and the quality requirement of the mechanical galvanizing technical standard acceptance coating in ISO 12683:2004 mechanical plated coatings with degrees of accuracy and test methods.
Detailed Description
The following detailed description is provided to illustrate specific embodiments, structures, features, and functions of the invention in connection with the preferred embodiments.
A high-strength steel nail-shooting mechanical galvanizing process without using sulfuric acid, hydrochloric acid and phosphoric acid comprises the following steps:
firstly, mechanically polishing the lower surface of a nail shooting line, wherein the mechanical polishing depends on rolling mechanical friction impact between shooting nails to remove a quenching oxidation film on the surface of the shooting nails;
secondly, after finishing the surface roll finishing treatment of the shot nail, putting the shot nail into a mechanical galvanizing roller to perform relevant process operation of mechanical galvanizing;
thirdly, cleaning and activating the surface of the shot nail, and adding an activating agent liquid and glass beads to carry out deep treatment of rolling friction cleaning on the surface of the shot nail;
fourthly, cleaning and removing trace waste liquid hung on the surface of the injection nail;
fifthly, a chemical copper plating process, namely adding chemical copper plating solution and water, and uniformly plating a metal copper plating layer on the surface of the nail by rolling, rubbing and colliding;
sixthly, cleaning and removing trace chemical copper plating waste liquid hung on the surface of the nail;
seventhly, performing mechanical galvanizing, adding an accelerant liquid and zinc powder according to the specific required coating thickness, and alternately adding the two raw materials to finish the process of generating the coating thickness by the mechanical galvanizing;
eighthly, cleaning and removing the zinc-plated trace waste liquid hung on the surface of the nail;
and step nine, performing post-plating treatment, namely soaking the plated nail in hot water of more than 80 ℃ and performing centrifugal drying to enable the surface of the nail to reach a rapidly dried state, so that the plating layer can keep bright and does not change color.
Furthermore, the amount of zinc powder and the amount of promoter liquid required to be added in the step 7 are respectively metered into 10 equal parts, the 2 equal parts are alternatively added, one part of promoter liquid with the total amount of 1/10 is added, then one part of zinc powder with the total amount of 1/10 is added, the alternative addition is repeated, each time is 3 minutes and is accompanied with the rotation of the roller, the whole process is 10 times, and the time is 30 minutes, so that the production thickening process of the mechanical galvanized coating is completed.
The glass beads in the third step adopt 5 kinds of glass beads with different diameters, and the diameter range of the 5 kinds of glass beads is 0.5-6 mm. The activator liquid consists of an organic acid combination, a surfactant, inorganic salt chloride and water, and specifically comprises the following components: 10-15% of tartaric acid, 13-18% of citric acid, 0.3-1% of sodium alkyl sulfonate, 3-7% of sodium chloride and 0.4% of NNO-dispersing agent. The chemical copper plating solution consists of an organic acid composition, copper salt, inorganic chloride and a surfactant, and specifically comprises the following components: 13-20% of copper sulfate, 3-5% of tartaric acid, 20-40% of citric acid, 3-7% of sodium chloride and 0.3-1% of sodium alkyl sulfonate. The accelerator consists of 13000 ml of accelerator liquid which is used in standard application and consists of organic acid combination, nonionic surfactant, wetting agent, dispersing agent, inorganic compound and water. The accelerator standard is calculated according to 13000 ml of an initiator liquid application composition formula: tartaric acid: 2-5%, citric acid: 3-6%, polyethylene glycol molecular weight 8000-: 1%, sodium alkyl benzene sulfonate: 0.1-0.3%, sodium methylene bis-naphthalene sulfonate: 0.1-0.3%, penetrant JFC: 0.05-0.1%, stannous sulfate: 0.5-1%, stannous chloride: 0.6-1.2%, zinc sulfate: 0.1 to 1 percent.
The invention provides a high-strength steel nail-shooting mechanical galvanizing process without using sulfuric acid, hydrochloric acid and phosphoric acid, inorganic acids such as sulfuric acid, hydrochloric acid and phosphoric acid are not used in the production process, so that the acid pollution to the environment is reduced, and the industrial system evaluation of raw materials formed by the formula belongs to nontoxic raw materials and meets the environmental protection limitation requirements of some administrative regions. In the production process, sulfuric acid, hydrochloric acid and phosphoric acid are not added, so that the mechanical galvanizing of the high-strength steel nail is prevented from being influenced by invasion of hydrogen embrittlement and phosphorus embrittlement, and a positive inhibiting effect is achieved. The high-strength steel nail shooting mechanical galvanizing process without using sulfuric acid, hydrochloric acid and phosphoric acid is a complete and related coherent operation process system, and comprises the steps of activating the surface of a nail shooting, connecting copper plating and connecting mechanical galvanizing, wherein an activator, a copper plating solution and a galvanizing accelerant are mutually correlated, and as a result, the quality of a galvanized coating of the high-strength steel nail shooting mechanical galvanizing coating can be ensured to stably meet specific requirements of users and meet the technical Specification and test method of the mechanical galvanizing coating in technical standards GB/T26106 and the quality requirement of the mechanical galvanizing technical standard acceptance coating in ISO 12683:2004 mechanical plated coatings with degrees of accuracy and test methods.
The first embodiment is as follows:
in an octagonal mechanical plating roller, a lining of polyurethane synthetic buffer elastic rubber with the thickness of 15 mm, the length of the roller being 1340 mm, the maximum diameter of an octagon being 1230 mm, the rotating power of the roller being 4 kilowatts, the operating speed: 0-36 r/min is adjustable.
Taking in 3.7X 27 high-strength steel to shoot 330 kilograms and finish the mechanical tumbling of pretreatment under the on-line, shoot nail surface and have already removed the quenching scale, the surface matrix is level and smooth, pack into the mechanical galvanizing cylinder, and add the impact medium glass bead 360 kilograms of 5 different specifications that the diameter is 0.5-6 millimeters respectively according to certain proportion, add water and roll and wash, and add 561 milliliters of activating agent liquid of the invention (activating agent liquid is made up of organic acid combination, surfactant active, water) cylinder according to: rotating at the rotating speed of 32 r/min, cleaning and activating for 3 minutes to ensure that the surface of the nail-shooting matrix is completely bright and in a surface activation state; and (5) washing with water once to perform electroless copper plating. In the chemical copper plating process, according to the rotating speed of a roller of 32 r/min, a proper amount of water and 561 ml of chemical copper plating solution (the chemical copper plating solution consists of organic acid combination, copper salt, inorganic chloride and surfactant) without sulfuric acid, hydrochloric acid and phosphoric acid are added, and the nail is plated by rolling for 3-5 minutes, so that a uniform and bright copper plating layer can be deposited on the surface of the nail. After water cleaning, the invention can be carried out on the copper plating layer: the mechanical galvanizing process operation without adding sulfuric acid, hydrochloric acid and phosphoric acid.
The thickness of the galvanized coating of the nail shooting machinery requires about 10 microns, so the zinc powder is metered and added: the start of mechanical galvanization was a coating of 7.88 g/kg x 330 kg shot =2600 g (625 mesh zinc powder) total zinc powder required during the galvanizing process, 2600 g corresponding to the required amount of accelerator liquid according to the invention for mechanical galvanization (accelerator liquid composition consisting of organic acid combination and non-ionic surfactant, wetting agent, dispersant, inorganic compound and water, total 13000 ml of mixed standard amount of used liquid) and associated action with addition of activator as described above): firstly, a thin transitional connection substrate layer is plated on a copper layer, so that the added zinc powder accounts for 10% of the total zinc powder and the corresponding mechanical zinc plating accelerant liquid is added, and accounts for 23% of the total accelerant.
Plating a base layer on the copper layer: the added accelerant and zinc powder are respectively divided into 3 equal parts and are alternately added for 3 times (the total addition amount is that the zinc powder is 260 g and the accelerant liquid is 3000 ml), the rotating speed of a roller is 30 r/min, the bottom layer can be built within 5 minutes, and the copper coating is changed from copper metal color to silver color of metal zinc; and then performing plating thickening operation on the surface of the shooting nail.
For the rest of the zinc powder: 2600 grams-260 grams =2340 grams; zinc plating accelerator: 13000 ml-3000 ml =10000 ml, for thickening operations in mechanical galvanization: the operation mode is that zinc powder is added after the accelerator is added every time, the rotating speed of a roller is adjusted to 26 revolutions per minute, so that the alternate adding operation is divided into 10 equal parts to be implemented (in the thickening middle range, the activating agent is added for 2 times, and the volume of the activating agent is 500 milliliters every time to improve the interface activity of the coating and improve the utilization rate of the zinc powder deposition coating), and the thickening operation of the galvanized coating of the nail shooting machine is completed within 30 minutes. Then, the rotating speed of the drum is adjusted to be 22 revolutions per minute, the drum is continuously rotated for 3 minutes, at the moment, a silvery white zinc coating reaching the brightness is generated on the surface of the nail shooting coating, at the moment, water is added into the drum to dilute chemical residual liquid, the drum is rotated for 1 minute, and then the drum is stopped, poured, cleaned, separated, soaked in hot water, centrifugally dried, and checked and accepted.
The inspection of the plated coating is qualified according to the technical specification and the test method of the GB/T26106-2010 mechanical zinc coating: the surface of the galvanized coating of the nail shooting machinery achieves fine metal white and bright luster; measuring the thickness magnetically, wherein the average thickness of a plating layer is 10 microns; the contrast uniformity of the plating thickness is basically consistent; the binding force of the coating (the coating is hit by a hammer, and the toughness is excellent) is qualified; salt spray test: the red rust occurrence time is 55-65 hours.
Example two:
in the same example, each plating barrel of the mechanical galvanizing roller is loaded with 260 kg of thick 3.3 × 30 high-strength steel shot nails, after the pretreatment mechanical tumbling is finished on line, the shot nail surface is removed with quenching scale and the surface matrix is smooth, the shot nail is loaded into the mechanical galvanizing roller, 300 kg of 5 impact medium glass beads with different specifications and the diameters of 0.5-6 mm are added according to a certain proportion, water is added for rolling cleaning, and 468 ml of the activating agent liquid (the activating agent liquid consists of organic acid combination, surfactant and water) of the invention is added into the roller according to the following steps: rotating at the rotating speed of 32 r/min, cleaning and activating for 3 minutes to ensure that the surface of the nail-shooting matrix is completely bright and in a surface activation state; and (5) washing with water once to perform electroless copper plating. In the chemical copper plating process, according to the rotating speed of a roller of 32 r/min, 442 ml of chemical copper plating solution (which consists of organic acid combination, copper salt, inorganic chloride and surfactant) without sulfuric acid, hydrochloric acid and phosphoric acid is added into a proper amount of water and does not add sulfuric acid, hydrochloric acid and phosphoric acid, and the chemical copper plating solution is plated after rolling for 3-5 minutes, so that a uniform and bright copper plating layer can be deposited on the surface of the nail. After water cleaning, the invention can be carried out on the copper plating layer: the mechanical galvanizing process operation without adding sulfuric acid, hydrochloric acid and phosphoric acid.
The thickness of the galvanized coating of the nail shooting machinery requires about 8 microns, so the zinc powder is metered and added: 8 g/kg x 260 kg nail =2080 g (500 mesh zinc powder) total amount of zinc powder required in the operation process of the galvanizing process is 2080 g, and corresponds to the required amount of the accelerator of the present invention used in mechanical galvanizing (the accelerator composition is composed of organic acid combination and nonionic surfactant, wetting agent, dispersant, inorganic compound and water), because the amount of zinc powder added at this time is 2080 g, and corresponding to the amount of zinc powder, the required initiator liquid is: (13000 ml × 2080 g) ÷ 2600 g =10400 ml, which requires make-up water: 13000-. In contrast, for the standard reference used for 13000 ml of initiator liquid of example one, by calculation, for example two, when 2080 g of zinc powder is added, the above-mentioned reference taken for the initiator is taken as: 10400 ml, and water is added: 2600 ml, in total: 10400+2600=13000 ml of fresh initiator liquid, 2080 g of zinc powder for mechanical galvanization of the 260 kg high strength nail, was used for galvanization.
The start of the mechanical galvanization plating is: first, a thin transitional connection substrate layer is plated on a copper layer, so that the added zinc powder accounts for 10% of the total zinc powder and the corresponding mechanical zinc plating accelerant liquid is added, and accounts for 23% of the total accelerant liquid.
Plating a base layer on the copper layer: the added accelerant and zinc powder are respectively divided into 3 equal parts and are alternately added for 3 times (the total addition amount is 208 g of zinc powder and 3000 ml of accelerant liquid), the rotating speed of a roller is 30 r/min, the bottom layer can be built within 5 minutes, and the copper coating is changed from copper metal color to silver white of metal zinc; and then performing plating thickening operation on the surface of the shooting nail.
For the rest of the zinc powder: 2080 grams-208 grams =1872 grams; zinc plating accelerator: 13000 ml to 3000 ml =10000 ml, to carry out the thickening operation of galvanization: the operation mode is that zinc powder is added after the accelerator is added, the rotating speed of a roller is adjusted to 26 revolutions per minute, thus the alternate adding operation is carried out by dividing into 10 equal parts (in the thickening middle range, the activating agent of the invention is added in 2 times, and each time is 450 milliliters to improve the interface activity of the coating and improve the utilization rate of the zinc powder deposition coating), and the thickening operation of the galvanized coating of the nail shooting machine is completed within 30 minutes. Then, the rotating speed of the drum is adjusted to be 22 revolutions per minute, the drum is continuously rotated for 3 minutes, at the moment, a silvery white zinc coating reaching the brightness is generated on the surface of the nail shooting coating, at the moment, water is added into the drum to dilute chemical residual liquid, the drum is rotated for 1 minute, and then the drum is stopped, poured, cleaned, separated, soaked in hot water, centrifugally dried, and checked and accepted.
The inspection of the plated coating is qualified according to the technical specification and the test method of the GB/T26106-2010 mechanical zinc coating: the surface of the galvanized coating of the nail shooting machinery achieves fine metal white and bright luster; measuring the thickness magnetically, wherein the average thickness of a plating layer is 8 microns; the contrast uniformity of the plating thickness is basically consistent; the binding force of the coating (the coating is hit by a hammer, and the toughness is excellent) is qualified; salt spray test: the red rust occurrence time is 52-56 hours.
Example three:
in the same example, the mechanical galvanized roller is used, each galvanized roller is loaded with 300 kg of 3.7 × 27 high-strength steel shot nails, after the pretreatment mechanical tumbling is finished on line, the shot nail surface is removed with quenching scale and the surface matrix is smooth, the shot nails are loaded into the mechanical galvanized roller, 330 kg of 5 impact medium glass beads with different specifications and diameters of 0.5-6 mm are added according to a certain proportion, water is added for rolling cleaning, and 540 ml of the activating agent liquid (the activating agent liquid consists of organic acid combination, surfactant and water) of the invention is added into the roller according to the following steps: rotating at the rotating speed of 32 r/min, cleaning and activating for 3 minutes to ensure that the surface of the nail-shooting matrix is completely bright and in a surface activation state; the water cleaning is carried out once, because the operation does not need chemical copper plating, the high-strength steel nail-shooting mechanical galvanizing process without using sulfuric acid, hydrochloric acid and phosphoric acid is required to be directly carried out on the high-strength steel substrate, and thus, the water cleaning can be carried out once: the mechanical galvanizing process operation without adding sulfuric acid, hydrochloric acid and phosphoric acid.
The thickness of the galvanized coating of the nail shooting machinery requires about 10 microns, so the zinc powder is metered and added: 7.9 g/kg x 300 kg shot =2370 g (625 mesh zinc powder) the total amount of zinc powder required during the galvanizing process is 2370 g and the above-mentioned activator is added in association with the required amount of the accelerator of the invention used for mechanical galvanization (the composition of the accelerator consists of an organic acid combination and a nonionic surfactant, a wetting agent, a dispersant, an inorganic compound and water). The start of the mechanical galvanization plating is: firstly, a thin transitional connection substrate layer is plated on a high-strength steel shooting nail surface substrate without a copper layer, so that the added zinc powder accounts for 10% of the total zinc powder and the added amount of the corresponding mechanical galvanizing accelerant liquid accounts for 23% of the total amount of the accelerant. (in a similar manner to example two, 13000 ml of initiator liquid of example one was used as a standard reference by calculating (13000 ml. times.2370 g) ÷ 2600 g =11850 ml of initiator liquid, which requires additional water 13000 ml to 11850 ml =1150 ml of water, to make up a new 13000 ml of initiator liquid corresponding to 2370 g of zinc powder for plating.
Plating a base layer on a high-strength steel substrate: the added accelerant and zinc powder are respectively divided into 3 equal parts and are alternately added for 3 times (the total addition amount is that the zinc powder is 237 g and the accelerant liquid is 3000 ml), the rotating speed of a roller is 30 r/min, the bottom layer can be built within 5 minutes, and the surface of the high-strength steel matrix is converted into the silvery white of the metal zinc; and then performing plating thickening operation on the surface of the shooting nail.
For the rest of the zinc powder: 2370 g-237 g =2133 g; zinc plating accelerator: 13000 ml to 3000 ml =10000 ml, to carry out the thickening operation of galvanization: the operation mode is that zinc powder is added after the accelerator is added every time, the rotating speed of a roller is adjusted to be 27 revolutions per minute, so that the alternate adding operation is divided into 10 equal parts to be implemented (in the thickening middle range, the activating agent is added for 2 times, and the volume of the activating agent is 450 milliliters every time to improve the interface activity of the coating and improve the utilization rate of the zinc powder deposition coating), and the thickening operation of the galvanized coating of the nail shooting machine is completed within 30 minutes. Then, the rotating speed of the drum is adjusted to be 22 revolutions per minute, the drum is continuously rotated for 3 minutes, at the moment, a silvery white zinc coating reaching the brightness is generated on the surface of the nail shooting coating, at the moment, water is added into the drum to dilute chemical residual liquid, the drum is rotated for 1 minute, and then the drum is stopped, poured, cleaned, separated, soaked in hot water, centrifugally dried, and checked and accepted.
The inspection of the plated coating is qualified according to the technical specification and the test method of the GB/T26106-2010 mechanical zinc coating: the surface of the galvanized coating of the nail shooting machinery achieves fine metal white and bright luster; measuring the thickness magnetically, wherein the average thickness of a plating layer is 10 microns; the contrast uniformity of the plating thickness is basically consistent; the binding force of the coating (the coating is hit by a hammer, and the toughness is excellent) is qualified; salt spray test: the red rust occurrence time is 55-65 hours.
The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (5)
1. A mechanical galvanizing process for a high-strength steel nail without using sulfuric acid, hydrochloric acid and phosphoric acid is characterized by comprising the following steps: firstly, mechanically polishing the lower surface of a nail shooting line, wherein the mechanical polishing depends on rolling mechanical friction impact between shooting nails to remove a quenching oxidation film on the surface of the shooting nails;
secondly, after finishing the surface roll finishing treatment of the shot nail, putting the shot nail into a mechanical galvanizing roller to carry out mechanical galvanizing process production operation;
thirdly, cleaning and activating the surface of the shot nail, and adding an activating agent liquid and glass beads to carry out deep treatment of rolling friction cleaning on the surface of the shot nail;
fourthly, cleaning and removing trace waste liquid hung on the surface of the injection nail;
fifthly, a chemical copper plating process, namely adding chemical copper plating solution and water, and uniformly plating a metal copper plating layer on the surface of the nail by rolling, rubbing and colliding;
sixthly, cleaning and removing trace chemical copper plating waste liquid hung on the surface of the nail;
seventhly, performing mechanical galvanizing, adding an accelerant liquid and zinc powder according to the specific required thickness of the coating, and alternately adding the two raw materials to finish the plating process of generating the coating by mechanical galvanizing;
eighthly, cleaning and removing the zinc-plated trace waste liquid hung on the surface of the nail;
ninth, after plating, the nail is soaked in hot water with the temperature of more than 80 ℃ and centrifugally dried, so that the surface of the nail reaches a quick drying state, and the plating layer can keep bright and does not change color;
the glass beads in the third step adopt 5 kinds of glass beads with different diameters, and the diameter range of the 5 kinds of glass beads is 0.5-6 mm;
the activator liquid consists of an organic acid combination, a surfactant, inorganic salt chloride and water, and specifically comprises the following components: 10-15% of tartaric acid, 13-18% of citric acid, 0.3-1% of sodium alkyl sulfonate, 3-7% of sodium chloride and 0.4% of NNO-dispersing agent.
2. The mechanical galvanizing process for the high-strength steel nail-shooting machine without using sulfuric acid, hydrochloric acid and phosphoric acid according to claim 1, characterized in that: the chemical copper plating solution consists of an organic acid composition, copper salt, inorganic chloride and a surfactant, and specifically comprises the following components: 13-20% of copper sulfate, 3-5% of tartaric acid, 20-40% of citric acid, 3-7% of sodium chloride and 0.3-1% of sodium alkyl sulfonate.
3. The mechanical galvanizing process for the high-strength steel nail-shooting machine without using sulfuric acid, hydrochloric acid and phosphoric acid according to claim 1, characterized in that: the accelerator described in step seven consisted of 13000 ml of accelerator liquid used as a standard, from a combination of organic acids and nonionic surfactant, wetting agent, dispersant, inorganic compound and water.
4. The mechanical galvanizing process for the high-strength steel nail-shooting machine without using sulfuric acid, hydrochloric acid and phosphoric acid according to claim 3, characterized in that: the accelerator standard is calculated according to 13000 ml of an initiator liquid application composition formula: tartaric acid: 2-5%, citric acid: 3-6%, polyethylene glycol molecular weight 8000-: 1%, sodium alkyl benzene sulfonate: 0.1-0.3%, sodium methylene bis-naphthalene sulfonate: 0.1-0.3%, penetrant JFC: 0.05-0.1%, stannous sulfate: 0.5-1%, stannous chloride: 0.6-1.2%, zinc sulfate: 0.1 to 1 percent.
5. The mechanical galvanizing process for the high-strength steel nail-shooting machine without using sulfuric acid, hydrochloric acid and phosphoric acid according to claim 1, characterized in that: and (3) respectively metering the amount of the zinc powder and the amount of the promoter liquid required to be added in the step 7 into 10 equal parts, wherein the 2 equal parts are alternately added, one part of the promoter liquid with the total amount of 1/10 is added, then one part of the zinc powder with the total amount of 1/10 is added, the alternate addition is repeated, the time is 3 minutes each time along with the rotation of the roller, the whole process is 10 times, and the time is 30 minutes, so that the production thickening process of the mechanical galvanized coating is completed.
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| US4832985A (en) * | 1987-10-20 | 1989-05-23 | Clayton Colleagues, Inc. | New composition and process for mechanical plating and the resulting article |
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