CN110760833A - High-efficiency antibacterial passivated galvanized steel sheet - Google Patents
High-efficiency antibacterial passivated galvanized steel sheet Download PDFInfo
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- CN110760833A CN110760833A CN201911250521.1A CN201911250521A CN110760833A CN 110760833 A CN110760833 A CN 110760833A CN 201911250521 A CN201911250521 A CN 201911250521A CN 110760833 A CN110760833 A CN 110760833A
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- antibacterial
- galvanized steel
- steel sheet
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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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/06—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/53—Treatment of zinc or alloys based thereon
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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
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
Abstract
The invention discloses a high-efficiency antibacterial passivated galvanized steel plate, which comprises a galvanized steel plate base material, wherein the upper surface and the lower surface of the galvanized steel plate base material are both provided with an antibacterial passivation film layer, the antibacterial passivation film layer is obtained by coating an antibacterial passivating agent on the surface of the galvanized steel plate to form an antibacterial passivating agent liquid film, and then heating and drying the antibacterial passivating agent liquid film, wherein the antibacterial passivating agent is a trivalent chromium passivating agent added with a nano antibacterial particle auxiliary agent, the average particle size of the nano antibacterial particle auxiliary agent is not more than 60nm, the nano antibacterial particle auxiliary agent is compatible with the trivalent chromium passivating agent, and the thickness range of the antibacterial passivation film layer is 1-10 microns; the invention creatively provides the passivation film layer with the antibacterial function, which has the efficient antibacterial effect on the premise of keeping the basic performances of corrosion resistance, processability, coating property and conductivity of the passivation film layer, has a simple structure, is convenient to prepare, and is suitable for being used as a batch production process.
Description
Technical Field
The invention relates to a galvanized steel sheet, in particular to a high-efficiency antibacterial passivated galvanized steel sheet.
Background
The galvanized steel sheets are more and more popular and widely used in the aspects of industry, public facilities and civil buildings, and the galvanized steel sheets are widely used in air-conditioning and ventilation pipelines of large-scale venues and public buildings. On the one hand, such facilities are generally located in hidden places, are inconvenient to clean and are easy to breed bacteria. Along with the improvement of the health consciousness of people, antibacterial requirements are put forward on the facilities. Therefore, the core technical problem to be solved for developing the galvanized steel sheet product with the antibacterial function is to have the dual characteristics of structural materials and antibacterial functional materials, and to enable the galvanized steel sheet product to have the advantages of no toxicity, broad-spectrum antibacterial property, long antibacterial aging and the like. On the other hand, the performance of the passivated galvanized steel sheet is rapidly developed along with the progress of the coating chemical technology, the functions are more and more abundant, and the performances are more and more excellent from the initial corrosion resistance and the moist heat resistance to the subsequent lubricity, the coating property, the weldability and the weather resistance.
With the development of passivation coating technology and the gradual refinement of the application of galvanized steel sheets, the market puts forward the requirement on the antibacterial function of the galvanized steel sheets, but the existing passivation coating has a plurality of functions but does not have the antibacterial function, and the requirement on the antibacterial function of the galvanized steel sheets cannot be met.
Specifically, the existing antibacterial galvanized steel sheet technology is mainly to coat paint with antibacterial function on the surface of the galvanized steel sheet, and the galvanized steel sheet is assembled and installed to be used in product facilities with antibacterial requirements; however, the conventional passivation film layer has no antibacterial property and is easy to grow bacteria in a dark and humid environment, and therefore, the applicant hopes to seek a technical scheme for improving the technology.
Disclosure of Invention
In view of the above, the present invention provides an efficient antibacterial passivated galvanized steel sheet, and provides a passivation film layer with an antibacterial function creatively, which has an efficient antibacterial effect on the premise of maintaining the basic performances of corrosion resistance, processability, paintability and conductivity of the passivation film layer, and is simple in structure, convenient to prepare, and suitable for being used as a batch production process.
The technical scheme adopted by the invention is as follows:
the utility model provides a high-efficient antibiotic passivation galvanized steel sheet, includes galvanized steel sheet substrate, galvanized steel sheet substrate's upper surface and lower surface all are equipped with antibiotic passivation rete, antibiotic passivation rete through to the galvanized steel sheet surface coating antibiotic passivating agent forms antibiotic passivating agent liquid film, then heats stoving to this antibiotic passivating agent liquid film and obtains, wherein, antibiotic passivating agent adopts the trivalent chromium passivating agent that adds with nanometer antibiotic granule auxiliary agent, the average particle size of nanometer antibiotic granule auxiliary agent is not more than 60nm, and it with trivalent chromium passivating agent has the compatibility, the thickness range of antibiotic passivation rete is 1-10 microns.
Preferably, the nano antibacterial particle assistant accounts for 1-5% of the trivalent chromium passivator by weight.
Preferably, the pH of the trivalent chromium passivator ranges from 1 to 2.
Preferably, the average particle size of the nano antibacterial particle assistant is not more than 30 nm.
Preferably, the nano antibacterial particle assistant is an inorganic silver-based nano antibacterial particle assistant.
Preferably, the coating is performed by an extrusion roll coating process, and the operation steps comprise:
A10) preparing a trivalent chromium passivator added with a nano antibacterial particle assistant in advance, uniformly dispersing the nano antibacterial particle assistant in the trivalent chromium passivator through a stirring device to obtain an antibacterial passivator, and placing the antibacterial passivator in a material tray of an extrusion roller coating device;
A20) starting the extrusion roller coating device, and conveying the antibacterial passivating agent in the adsorption material tray to the coating roller through the material carrying roller;
A30) and respectively and uniformly coating the antibacterial passivating agent on the upper surface and the lower surface of the galvanized steel sheet base material through the paint roller, wherein the upper surface and the lower surface of the galvanized steel sheet base material respectively form an antibacterial passivating agent liquid film.
Preferably, the material carrying roller and the coating roller are both made of rubber.
Preferably, the operation steps of heating and drying adopt: placing the galvanized steel sheet substrate with the antibacterial passivator liquid films formed on the upper surface and the lower surface in a thermal radiation type oven; and the heating temperature range of the heat radiation type drying oven is 80-100 ℃, and the heating time is 5-20 seconds, so that the moisture in the antibacterial passivating agent liquid film is volatilized to form the antibacterial passivating film layer, and the antibacterial passivated galvanized steel sheet is obtained.
Preferably, the antibacterial passivated galvanized steel sheet is cooled and rolled in an air cooling mode after being heated and dried, wherein the cooling temperature is not more than 40 ℃, and the cooling method is used for avoiding the adhesion of the antibacterial passivated film layers of the adjacent antibacterial passivated galvanized steel sheets in the rolling process.
Preferably, the content range of chromium in the antibacterial passivation film layer is 40-50mg/m2。
It should be noted that, the known nano antibacterial particle assistant purchased in the market is adopted as the nano antibacterial particle assistant in the present invention, and the present invention has no particular innovation to the material itself, so the present application does not specifically describe the specific material components of the nano antibacterial particle assistant, wherein, as the most preferable scheme of the nano antibacterial particle assistant, the main component of the inorganic silver-based nano antibacterial particle assistant is silver ions, and the antibacterial principle mainly comprises a contact reaction and a photocatalytic reaction.
It should be further noted that, before the present application is provided, a person skilled in the art generally considers that a passivation film layer is formed only by using a passivating agent, and does not allow to add other functional additives, otherwise, the density of the passivation film layer is seriously damaged, so that a very obvious negative effect is caused on a passivation effect.
The invention creatively provides a passivation film layer with an antibacterial function, and particularly provides an antibacterial passivating agent prepared by adding a nano antibacterial particle assistant into a trivalent chromium passivating agent, wherein the nano antibacterial particle assistant has a very high specific surface area and has very good compatibility with the trivalent chromium passivating agent; and then the antibacterial passivating agent is coated, heated and dried, and then the antibacterial passivating agent is respectively formed on the upper surface and the lower surface of the galvanized steel sheet substrate to obtain an antibacterial passivating film layer, so that the addition of the nano antibacterial particle auxiliary agent can be effectively ensured not to influence the compact passivating effect of the passivating film layer.
Drawings
FIG. 1 is a schematic layer structure diagram of a high-efficiency antibacterial passivated galvanized steel sheet 100 according to an embodiment of the invention;
FIG. 2 is a block diagram of the steps of an extrusion roll coating process in accordance with an embodiment of the present invention.
Detailed Description
The embodiment of the invention discloses a high-efficiency antibacterial passivated galvanized steel plate, which comprises a galvanized steel plate base material, wherein antibacterial passivation film layers are arranged on the upper surface and the lower surface of the galvanized steel plate base material, an antibacterial passivating agent liquid film is formed by coating an antibacterial passivating agent on the surface of the galvanized steel plate, and then the antibacterial passivating agent liquid film is heated and dried to obtain the antibacterial passivated steel plate, wherein the antibacterial passivating agent is a trivalent chromium passivating agent added with a nano antibacterial particle auxiliary agent, the average particle size of the nano antibacterial particle auxiliary agent is not more than 60nm, the nano antibacterial particle auxiliary agent is compatible with the trivalent chromium passivating agent, and the thickness range of the antibacterial passivation film layer is 1-10 micrometers.
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Please refer to fig. 1, which illustrates a high-efficiency antibacterial passivated galvanized steel sheet 100, comprising a galvanized steel sheet substrate 110, wherein the upper surface and the lower surface of the galvanized steel sheet substrate 110 are both provided with an antibacterial passivation film layer 120, the antibacterial passivation film layer 120 is obtained by coating an antibacterial passivator on the surface of the galvanized steel sheet 110 to form an antibacterial passivator liquid film, and then heating and drying the antibacterial passivator liquid film, wherein the antibacterial passivator is a trivalent chromium passivator added with a nano antibacterial particle assistant, the average particle size of the nano antibacterial particle assistant is not more than 60nm, the nano antibacterial particle assistant has compatibility with the trivalent chromium passivator, and the thickness of the antibacterial passivation film layer 120 is 1-10 micrometers;
preferably, in this embodiment, the nano antibacterial particle assistant accounts for 1 to 5 weight percent of the trivalent chromium passivator, the pH value of the trivalent chromium passivator ranges from 1 to 2, the average particle size of the nano antibacterial particle assistant is not greater than 30nm, and the nano antibacterial particle assistant is an inorganic silver-based nano antibacterial particle assistant;
specifically, in this embodiment, the thickness of the antibacterial passivation film layer 120 is 5 micrometers, the nano antibacterial particle assistant accounts for 2.5% of the trivalent chromium passivating agent by weight, the pH value of the trivalent chromium passivating agent is 1.5, the nano antibacterial particle assistant is an inorganic silver-based nano antibacterial particle assistant (purchased in the market), similar technical effects of this embodiment can be obtained by adopting other proposed preferred parameter ranges in this application, and the description is not repeated one by one;
preferably, in this embodiment, referring to fig. 2, the coating is performed by an extrusion roll coating process, and the operation steps include the following steps:
A10) preparing a trivalent chromium passivator added with a nano antibacterial particle assistant in advance, uniformly dispersing the nano antibacterial particle assistant in the trivalent chromium passivator through a conventional stirring device to obtain an antibacterial passivator, and placing the antibacterial passivator in a material tray of an extrusion roller coating device;
A20) starting the extrusion roller coating device, and conveying the antibacterial passivating agent in the adsorption material tray to the coating roller through the material carrying roller;
A30) respectively and uniformly coating the antibacterial passivating agent on the upper surface and the lower surface of the galvanized steel sheet base material by a coating roller, and respectively forming an antibacterial passivating agent liquid film on the upper surface and the lower surface of the galvanized steel sheet base material;
in order to ensure the uniformity in coating, the belt roller and the coating roller of the squeeze roll coating device of the embodiment are both made of rubber;
the operation steps of the heating and drying of the embodiment are as follows: placing the galvanized steel sheet substrate 110 with the antibacterial passivator liquid films formed on the upper surface and the lower surface respectively in a heat radiation type oven; the heating temperature range of the heat radiation type oven is 80-100 ℃, and the heating time is 5-20 seconds; particularly preferably, the heating time is 5 to 10 seconds; so that the water in the antibacterial passivating agent liquid film is volatilized to form an antibacterial passivating film layer 120, and the antibacterial passivated galvanized steel sheet 100 is obtained;
preferably, in the embodiment, after heating and drying, the antibacterial passivated galvanized steel sheet is cooled and rolled in an air cooling mode, wherein the cooling temperature is not more than 40 ℃, and a specific suggestion is set at 25-30 ℃ for avoiding the adhesion of the antibacterial passivation film layer 120 of the adjacent antibacterial passivated galvanized steel sheet 100 in the rolling process, so as to ensure that the antibacterial passivation film layer 120 of the antibacterial passivated galvanized steel sheet 100 is not damaged.
The applicant verifies that the efficient antibacterial passivated galvanized steel sheet 100 prepared by the embodiment has good inhibition effects on escherichia coli, staphylococcus aureus, klebsiella pneumoniae, pseudomonas aeruginosa, wood army bacterium and diphtheria bacillus on the basis of keeping the basic performances of the passivation film layer such as corrosion resistance, processability, paintability, conductivity and the like, the inhibition rate reaches over 99 percent, and the breeding and propagation of various bacteria on the surface of the efficient antibacterial passivated galvanized steel sheet 100 are reliably prevented.
Comparative example 1: the other technical schemes of the comparative example 1 are the same as those of the example 1, except that in the comparative example 1, the hexavalent chromium passivator is adopted to replace the trivalent chromium passivator in the example 1, the hexavalent chromium passivator has no compatibility with the inorganic silver-based nano antibacterial particle additive, and the compactness of a passivation film layer is poor in time, so that the corrosion resistance, the processability and the coating performance of the galvanized steel plate are obviously poor, and the application requirements of customers cannot be met.
Comparative example 2: the other technical solutions of the comparative example 1 are the same as those of the example 1, except that in the comparative example 1, the inorganic silver-based nano antibacterial particle assistant in the example 1 is replaced by the non-nano antibacterial assistant (the average particle size is greater than 100 micrometers) with the conventional particle size, and by observing the surface state of the galvanized steel sheet, obvious shrinkage cavities exist, so that the galvanized steel sheet is poor in performance of a basic passivation film layer and an antibacterial effect and cannot meet the application requirements of customers because the compatibility of the non-nano antibacterial assistant and a trivalent chromium passivating agent is poor, and the non-nano antibacterial assistant cannot be well and uniformly dispersed in the trivalent chromium passivating agent.
The embodiment creatively provides the passivation film layer 120 with the antibacterial function, and particularly provides an antibacterial passivating agent prepared by adding a nano antibacterial particle assistant into a trivalent chromium passivating agent, wherein the nano antibacterial particle assistant has a very high specific surface area and very good compatibility with the trivalent chromium passivating agent; then, the antibacterial passivating agent is coated, heated and dried, and then the antibacterial passivating agent is respectively formed on the upper surface and the lower surface of the galvanized steel sheet substrate 110 to obtain the antibacterial passivating film layer 120, so that the addition of the nano antibacterial particle auxiliary agent can be effectively ensured not to influence the compact passivating effect of the passivating film layer 120, and the further production and application verification of an actual production line is carried out.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The high-efficiency antibacterial passivated galvanized steel plate comprises a galvanized steel plate base material and is characterized in that antibacterial passivation film layers are arranged on the upper surface and the lower surface of the galvanized steel plate base material, an antibacterial passivating agent liquid film is formed by coating an antibacterial passivating agent on the surface of the galvanized steel plate, and then the antibacterial passivating agent liquid film is heated and dried to obtain the high-efficiency antibacterial passivated galvanized steel plate, wherein the antibacterial passivating agent is a trivalent chromium passivating agent added with a nano antibacterial particle auxiliary agent, the average particle size of the nano antibacterial particle auxiliary agent is not more than 60nm, the nano antibacterial particle auxiliary agent and the trivalent chromium passivating agent are compatible, and the thickness range of the antibacterial passivation film layers is 1-10 microns.
2. The highly efficient antibacterial passivated galvanized steel sheet according to claim 1, characterized in that the nano antibacterial particle assistant accounts for 1-5% of the weight of the trivalent chromium passivator.
3. A highly efficient antibacterial passivated galvanized steel sheet according to claim 1 wherein the pH of said trivalent chromium passivating agent ranges from 1 to 2.
4. A highly efficient antibacterial passivated galvanized steel sheet according to claim 1 wherein the average particle size of the nano antibacterial particle assistant is not more than 30 nm.
5. The high-efficiency antibacterial passivated galvanized steel sheet according to claim 1 or 4, characterized in that the nano antibacterial particle assistant is an inorganic silver-based nano antibacterial particle assistant.
6. A highly effective antibacterial passivated galvanized steel sheet according to claim 1 wherein the coating is performed by extrusion roll coating process, the operation steps of which include:
A10) preparing a trivalent chromium passivator added with a nano antibacterial particle assistant in advance, uniformly dispersing the nano antibacterial particle assistant in the trivalent chromium passivator through a stirring device to obtain an antibacterial passivator, and placing the antibacterial passivator in a material tray of an extrusion roller coating device;
A20) starting the extrusion roller coating device, and conveying the antibacterial passivating agent in the adsorption material tray to the coating roller through the material carrying roller;
A30) and respectively and uniformly coating the antibacterial passivating agent on the upper surface and the lower surface of the galvanized steel sheet base material through the paint roller, wherein the upper surface and the lower surface of the galvanized steel sheet base material respectively form an antibacterial passivating agent liquid film.
7. A highly effective antibacterial passivated galvanized steel sheet according to claim 1 characterized in that said strip roll and said paint roll are both made of rubber.
8. The highly effective antibacterial passivated galvanized steel sheet according to claim 1 or 6 is characterized in that the operation steps of heating and drying are as follows: placing the galvanized steel sheet substrate with the antibacterial passivator liquid films formed on the upper surface and the lower surface in a thermal radiation type oven; and the heating temperature range of the heat radiation type drying oven is 80-100 ℃, and the heating time is 5-20 seconds, so that the moisture in the antibacterial passivating agent liquid film is volatilized to form the antibacterial passivating film layer, and the antibacterial passivated galvanized steel sheet is obtained.
9. The high-efficiency antibacterial passivated galvanized steel sheet according to claim 7, characterized in that the antibacterial passivated galvanized steel sheet is cooled and rolled in an air cooling mode after being heated and dried, wherein the cooling temperature is not more than 40 ℃ for avoiding the adhesion of the antibacterial passivation film layers of the adjacent antibacterial passivated galvanized steel sheets in the rolling process.
10. A highly effective antibacterial passivated galvanized steel sheet according to claim 1 characterized in that the chromium content in the antibacterial passivation film layer ranges from 40 to 50mg/m2。
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| CN201911250521.1A CN110760833A (en) | 2019-12-09 | 2019-12-09 | High-efficiency antibacterial passivated galvanized steel sheet |
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