CN101671825B - Pre-treating technique for composite metal plastic pipe - Google Patents
Pre-treating technique for composite metal plastic pipe Download PDFInfo
- Publication number
- CN101671825B CN101671825B CN2009101930204A CN200910193020A CN101671825B CN 101671825 B CN101671825 B CN 101671825B CN 2009101930204 A CN2009101930204 A CN 2009101930204A CN 200910193020 A CN200910193020 A CN 200910193020A CN 101671825 B CN101671825 B CN 101671825B
- Authority
- CN
- China
- Prior art keywords
- washing
- phosphatization
- technology
- pretreatment technology
- concentration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Chemical Treatment Of Metals (AREA)
Abstract
The invention discloses a pre-treating technique for a composite metal plastic pipe which pre-treats a steel tube with a parkerizing process. The treating process orderly consists of removing grease, washing with water, washing with acid, washing with water, neutralizing, washing with water, regulating surface, parkerizing, washing with water, regulating surface and drying. By pre-treating a composite metal plastic pipe with the parkerizing process, the invention not only solves the rust-proof and rot-proof problems in the middle processes of the composite metal plastic pipe, but also promotes the adhesive attraction of the macromolecular powder doped plastic-coated steel tube. By adopting dipping mode, with simple and convenient operation, the invention can treat the worepieces with various geometrical shapes. The invention can obtain an excellent effect which the spraying and printing techniques cannot obtain. According to the characteristic of the composite metal plastic pipe, the invention optimizes the parameters in parkerizing process and detects and maintains during the pre-treating process, to ensure that the whole treating process can be finished under any condition and to ensure the quality during the pre-treating process.
Description
Technical field
The present invention relates to the steel-plastics composite pipe technical field, relate in particular to a kind of pretreatment technology of steel-plastics composite pipe.
Background technology
Steel-plastics composite pipe is to be parent tube with weldless steel tube, Welded Steel Pipe, interior finishing high adhesive force, polyethylene powders anticorrosion, the food grade hygiene-type are coated with or epoxypaint, zinc-plated internal plastic coating composite steel tube of feedwater that employing pre-treatment, preheating, application, levelling (or curing), aftertreatment technology are made or combustion gas, fire-fighting spraying inside and outside composite steel tube are the upgraded products of traditional galvanized pipe.
Present preprocessing technical field at steel-plastics composite pipe, domestic technology all adopts carries out the antirust processing of sandblast earlier to steel pipe, and then will be sprayed at pretreated steel tube surface to polymeric powder coating equably, after curing or plasticizing, even, fine and close, the slick plastic coating of formation one deck in the metallic surface.Yet the effect of pretreated like this spraying is unsatisfactory, and main blasting craft can not be consistent at each section to the steel pipe effect that reaches 6m, makes follow-up spraying homogeneity be subjected to very big influence.
In addition, because the geometrical shape of steel-plastics composite pipe is complicated different, adopt technologies such as spray, brushing can't reach evenly antirust comprehensively, etch-proof purpose, therefore in the preparation technology of steel-plastics composite pipe, before not spraying after the steel pipe pre-treatment, steel pipe is carried out rust resistance and corrosion resistance become maximum problem.Moulding pipe manufacturing enterprise for large-scale steel especially, solve rust prevention during manufacture and be after the pre-treatment antirust before the spraying, is the basis of its suitability for industrialized production.
The phosphating process process is the process that a kind of chemistry and electrochemical reaction form the phosphate chemical conversion film; formed phosphate conversion film is referred to as phosphatize phosphate coat; phosphating process can provide protection to matrix metal; prevent that to a certain extent metal is corroded; can also be used to the preceding bottoming of painting; improve the sticking power and the anti-corrosion capability of paint film layer, and in the metal cold machining process, play the lubricated use of antifriction.
The normal temperature low-temperature zinc-based phosphatization is to use a kind of very widely phosphating process, and particularly in the household electrical appliance industry, low-temperature zinc-based phosphatization occupies dominant position fully, even in automobile industry, low-temperature zinc-based phosphatization also occupies certain proportion.
In phosphating process, normal temperature phosphating is the phosphatization of not heating, and temperature range is 5～30 ℃.It is 35～45 ℃ phosphating process that low temperature phosphor is often referred to phosphatization temperature, even in that temperature drift is more on the low side in some cases, also think low temperature phosphor.
Low-temperature zinc-based phosphatization generally needs the colloidal titanium surface preparation, the grain formation slim phosphatize phosphate coat of refinement phosphatization first; Second improve phosphorization filming speed.Low-temperature zinc-based phosphatization is adjusted pretreated workpiece through surperficial colloidal titanium, in 35～45 ℃ of temperature ranges, only need 1～2min during spray, soaking also only needs 3～8min can form evenly complete careful phosphatize phosphate coat, film weighs 1.5～2.5g/m2, can increase thickness a little by regulating methods such as free acidity.Low temperature phosphor and all kinds of japanning all have good matching capacity.
Had not yet to see phosphating process, especially normal temperature low-temperature zinc-based phosphatization technology is used for the pretreated relevant report of steel-plastics composite pipe.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, provide a kind of employing phosphating process technology that firm plastic composite is carried out pretreated technology, not only the rust resistance and corrosion resistance effect can be played, and the sticking power of later stage during the macromolecular material plastic-coated steel can be improved.
Above-mentioned purpose of the present invention is achieved by following scheme:
A kind of pretreatment technology of steel-plastics composite pipe, this technology are to adopt phosphating process that steel pipe is carried out pre-treatment, and its treating processes adopts traditional phosphating process process " to remove grease → washing → pickling → washing → neutralization → washing → table accent → phosphatization ".
In the above-mentioned pretreatment technology, the preferred normal temperature low-temperature zinc-based phosphatization of phosphating process technology is carried out pre-treatment to steel pipe.
In the above-mentioned pretreatment technology, the inventor is optimized improvement at the characteristics of steel-plastics composite pipe with some parameters in traditional normal temperature low-temperature zinc-based phosphatization technology, thereby obtains the pretreatment technology that a cover is fit to steel-plastics composite pipe, specific as follows shown in:
(1) removes grease and pickling
These two steps all adopt the salt acid treatment, and the hydrochloric acid working concentration is 30～40% (volume percent), and add the acid deoiling agent of 1～2% (volume percent) simultaneously in hydrochloric acid: described acid deoiling agent is nitric acid or nitrous acid solution.
The treatment time of these two steps all can be selected 5～20min, in the specific operation process, can also look workpiece surface dirt degree and adjust, and is unsuitable long as long as with workpiece surface oil, rust, oxide skin Ex-all, in order to avoid excessive erosion.
(2) washing
Have three step washings to handle in the whole technology, selecting pH is that 7～8 water is washed processing, and the treatment time is 0.5～1min; Require water quality clean during washing, keep overflow, changed water once in 1～2 day.
(3) neutralization
Adopt neutralizing agent to carrying out neutralizing treatment through the system of removing grease operation and pickling operation; Described neutralizing agent is the sodium hydroxide solution of 0.1mol/l.
The time of neutralizing treatment is 0.5～1min, and the pH value is 10～12.
When in and the pH value of system for handling when being lower than 10～12, add neutralizing agent in right amount, maintenance pH value; If sediment is too much in the system, blackout then need be changed, and is generally 5～7 days.
(4) (table is transferred) adjusted on the surface
Table is transferred and can be impelled phosphatization to form the careful closely knit phosphatize phosphate coat of crystal grain, improves phosphatization speed.
The employing table is adjusted and is shown to mediate reason, and described table is adjusted can be titanium phosphate colloidal solution, and the concentration that table is adjusted is 2 ‰ (quality permillage concentration), also can be 3～5% oxalic acid solution for mass percent concentration.
It is 0.5～1min that table is mediated the reason time, and pH is 8～9.
Dirt is black if table is adjusted jaundice, and then catabiosis appears in explanation, needs to change again, and replacing in general 5～7 days once table is adjusted.
(5) phosphatization
Phosphatization adopts zinc phosphate as the Zinc phosphating agent, the zinc phosphate zinc phosphate solution that is mixed with soluble in water carries out bonderizing to steel pipe, the concentration of zinc phosphate solution is 5%～6% (mass percent), also be added with in the zinc phosphate solution 1.2 ‰～1.8 ‰ (quality permillage concentration) in and the promotor of powder and 1～3 ‰ (quality permillage concentration).
Above-mentioned Zinc phosphating agent also can be the acidic solution of dihydrogen phosphate, as Zn (H
2PO
4)
2The dilute acidic aqueous solution of forming, pH value is 1～3, the solution relative density is 1.05～1.10.
In above-mentioned and powder be sodium hydroxide.
Above-mentioned promotor is nitrate, molybdate, nitrite, oxymuriate, hypochlorite or organic nitre nitro-compound, can also adopt nitrate and nitrite, and perhaps nitrite and hypochlorite are used.
Controlled variable is during phosphatization: the total acidity of phosphatization liquid is 25～35 points, the free acidity of phosphatization liquid is 1.0～2.0 points, and the concentration of promotor is 1～3 point, 30～35 ℃ of treatment temps, 10～30 minutes treatment times, acid ratio=total acidity/free acidity=20～30 (preferred 25); Described phosphatization liquid is the working fluid when carrying out bonderizing;
The measuring method that above-mentioned total acidity (TA) is counted is those skilled in the art's common practise: get in the Erlenmeyer flask that 10 milliliters of phosphatization liquid add 250 milliliters and add 50 ml deionized water, add 2～3 phenolphthalein indicators, standard NaOH solution titration with 0.1 mol, become pink up to solution, the milliliter number of the standard NaOH solution that consumed this moment is counting of General Acidity in Phosphating Solution.
The measuring method that above-mentioned free acidity (FA) is counted is those skilled in the art's common practise: get in the Erlenmeyer flask that 10 milliliters of phosphatization liquid add 250 milliliters and add 50 ml deionized water, add 2～3 tetrabromophenol sulfonphthalein indicator, standard NaOH solution titration with 0.1 mol, become blueness up to solution, the milliliter number of the standard NaOH solution that consumed this moment is counting of free acidity.
The measuring method that above-mentioned promotor is counted is those skilled in the art's common practise: phosphatization liquid is filled fermentation tube (about 120 grammes per square metres), add thionamic acid 2～3 grams with the ox horn spoon, immediately mouth is obturaged with palm, unclamp palm, set level and leave standstill about one minute, observe the scale reading that the fermentation tube top gas is occupied height, be counting of promoter concentration.
Pretreatment technology of the present invention also can once show to mediate reason again behind bonderizing, its whole technological process is: remove grease → washing → pickling → washing → neutralization → washing → table accent → phosphatization → washing → table accent → oven dry.Be weakly alkaline because table is adjusted, many step tables are transferred and can be made product surface be weakly alkaline, and the extension acid of having avoided the product surface washing thoroughly not bring causes the problem of returning rust, thereby has improved the antirust ability of product.
Pretreatment technology of the present invention in whole technological process, detects free acidity, total acidity and the promoter concentration of phosphatization liquid, simultaneously according to detected result, it is handled, thereby the acidity that guarantees phosphatization liquid remains in the suitable scope, it is as follows to handle operation:
(1) adjusting of General Acidity in Phosphating Solution and free acidity Zinc phosphating agent, about 1 point of 3kg rising total acidity that adds per ton, about 0.13 point of the free acidity that raises simultaneously;
(2) promotor repeatedly be added on a small quantity suitable, the general 1kg promotor that adds per ton, promoter concentration about 0.5 point of counting that raises;
(3) measured a total acidity in per 2～4 hours, promotor of measurement in 1～2 hour is counted, and measures free acidity every day 2 times, according to concentration parameter, and an amount of the interpolation, and perform relevant parameters and add record;
(4) if free acidity raises, turn down with neutralizing agent, groove per ton, can raise with phosphorization agent if free acidity is on the low side with reducing about 1 point of free acidity with powder among the 0.5kg; Also phosphoric acid groove per ton adds 1kg phosphoric acid, about 0.86 point of rising free acid (behind the first dilute with water, the limit edged stirs).
Pretreatment technology of the present invention adopts the form of soaking, adorning various treatment solutions in the groove respectively, then pending steel pipe is dipped in the groove, taking-up enters in the next treatment trough after pending for some time, thereby finishes targets such as oil removing, rust cleaning and phosphatization successively; No matter how complicated and simple different the geometrical shape of pending workpiece is, as long as processing target can both be realized in the place that liquid can arrive.
Compared with prior art, the present invention has following beneficial effect:
1. the present invention is applied to phosphating process in the preprocessing process of steel-plastics composite pipe, not only can solve the antirust, anti-corrosive problem in the middle operation of steel-plastics composite pipe effectively, and the formed phosphatize phosphate coat of phosphating process can also improve the sticking power of follow-up polymeric powder coating plastic-coated steel;
2. the present invention adopts the mode of immersion that steel-plastics composite pipe is carried out pre-treatment, simple to operation, no matter how complicated and simple different the geometrical shape of pending workpiece is, as long as the place that liquid can arrive, can both realize processing target, and owing to be soaked with liquid, the uniformity coefficient of processing also is best in the present pretreatment technology, this is spray, brush can not compare;
3. the present invention is according to the characteristics of steel-plastics composite pipe, various parameters in the phosphating process are optimized, also in preprocessing process, follow the tracks of to detect simultaneously and safeguard, thereby guarantee that the entire treatment process carries out in suitable appropriate condition, guaranteed the quality of preprocessing process.
Description of drawings
Fig. 1 is the distribution plan of each cell body in the pretreatment technology of steel-plastics composite pipe of the present invention.
Embodiment
Below in conjunction with specific embodiment the present invention is done description further, but specific embodiment is not done any qualification to the present invention.
Steel-plastics composite pipe pretreatment technology of the present invention, it is technological process according to " removing grease → washing → pickling → washing → neutralization → washing → table accent → phosphatization → washing → table accent → oven dry ", the steel pipe of tape handling is put into various treatment troughs successively, take out after pending for some time and enter in the next treatment trough, thereby finish targets such as oil removing, rust cleaning and phosphatization successively, cell body of the present invention distributes as shown in Figure 1.
As shown in Figure 1, degreasing tank, washing bath, acid tank, washing bath, neutralizing well, washing bath, table transfer groove, phosphatization groove, washing bath, table to transfer groove to be arranged in order.
In the above-mentioned degreasing tank, the hydrochloric acid water is mixed with the hydrochloric acid soln of 30～40% (volume percent), pours in the groove, in groove, add 1～2% acid deoiling agent (this per-cent is the per-cent that accounts for the hydrochloric acid soln cumulative volume) simultaneously.
In the above-mentioned washing bath, be that 7～8 water pours in the groove with pH.
In the above-mentioned acid tank, the hydrochloric acid water is mixed with the hydrochloric acid soln of 30～40% (volume percent), pours in the groove, in groove, add 1～2% acid deoiling agent (this per-cent is the per-cent that accounts for the hydrochloric acid soln cumulative volume) simultaneously.
In the above-mentioned neutralizing well, the sodium hydroxide solution of water compound concentration 0.1mol/l pours in the groove.
Above-mentioned table is transferred in the groove, and the water of will showing to adjust is mixed with the solution that concentration is 2 ‰ (quality permillage concentration), pours in the groove.
In the above-mentioned phosphatization groove, the zinc phosphate water is mixed with the zinc phosphate solution that concentration is 5%～6% (mass percent), pour in the groove, in groove, add simultaneously 1.2 ‰～1.8 ‰ in and the promotor of powder and 1～3 ‰ (1.2 ‰～1.8 ‰ and 1～3 ‰ be meant respectively in and powder or promotor account for the permillage concentration of zinc phosphate solution total mass).
Operational process of craft of the present invention is as follows:
(1) will treat that pretreated steel pipe submerges earlier in the degreasing tank, steel tube surface oil will be removed, be generally 5～20min;
(2) the steel pipe that takes out from degreasing tank submerges washing bath again, require water quality clean during washing, keep overflow, following water inlet, upper water-out; 0.5～1min is handled in washing; Water in the washing bath can change water once in 1～2 day;
(3) will wash steel pipe after handling and submerge in the acid tank, to steel pipe eliminate rust, descaling handles, and is generally 5～20min;
(4) washing operation same step (2);
(5) the submerge steel pipe of neutralizing well, the treatment time in neutralizing well is 0.5～1min; The pH of total system in the monitoring neutralizing well remains in 10～12 the scope, if pH value is lower than 10～12, then adds an amount of neutralizing agent that adds, maintenance pH value; If sediment is too much in the system, blackout then need be changed the liquid in the neutralizing well, and replacing in general 5～7 days once gets final product;
(6) washing operation same step (2);
(7) table that after the washing steel pipe submerged is transferred groove, and it is 0.5～1min that table is mediated the reason time; Table transfers the total system pH in the groove to be controlled at 8～9; If table transfers the pH of groove undesirable, the suitable NaOH solution of available adding is adjusted; Dirt is black if table is adjusted jaundice, and then catabiosis appears in explanation, needs to change again, and replacing in general 5～7 days once table is adjusted;
(8) submerge 30～35 ℃ of its bonderizing temperature of steel pipe of phosphatization groove, 10～30 minutes treatment times; Monitor the concentration of total acidity, free acidity and the promotor of phosphatization liquid in the phosphatization groove by phased manner;
In the time of monitoring, earlier in the phosphatization groove, get phosphatization liquid (working fluid), detect the concentration of its total acidity, free acidity and promotor then, being controlled at total acidity is 25～35 points, the free acidity of phosphatization liquid is 1.0～2.0 points, the concentration of promotor is 1～3 point, acid ratio=total acidity/free acidity=20～30 (25 are advisable);
Measured a total acidity in per 2～4 hours, promotor of measurement in 1～2 hour is counted, and measures free acidity every day 2 times, according to concentration parameter, and an amount of the interpolation, and perform relevant parameters and add record;
The adjusting phosphorization agent of General Acidity in Phosphating Solution and free acidity, about 1 point of 3kg rising total acidity that adds per ton, about 0.13 point of the free acidity that raises simultaneously;
Promotor repeatedly is added to suitable on a small quantity, the general 1kg promotor that adds per ton, promoter concentration about 0.5 point of counting that raises;
If free acidity raises, to turn down with neutralizing agent, groove per ton, can raise with phosphorization agent if free acidity is on the low side with reducing about 1 point of free acidity with powder among the 0.5kg; Also phosphoric acid groove per ton adds 1kg phosphoric acid, about 0.86 point of rising free acid (behind the first dilute with water, the limit edged stirs);
1～3min wanted gentle agitation after steel pipe was put into the phosphatization groove, made phosphatize phosphate coat even, densification;
Small-caliber steel pipe will be noted seething several times more, makes evenly phosphatization of its surface;
Regularly clear up sediment every day, avoids sediment too much, impact effect;
(9) washing operation same step (2);
(10) table is transferred operation same step (7);
Steel pipe after will handling through above steps takes out, and can carry out polyethylene coated after the drying.
Claims (9)
1. the pretreatment technology of a steel-plastics composite pipe is characterized in that this technology is to adopt phosphating process that steel pipe is carried out pre-treatment, and the process of described phosphating process is followed successively by except that grease, washing, pickling, washing, neutralization, washing, table mediation phosphatization; In the described parkerizing process, the total acidity of phosphatization liquid is 25～35 points, and the free acidity of phosphatization liquid is 1.0～2.0 points, and the concentration of promotor is 1～3 point, and the bonderizing temperature is 30～35 ℃, and the time is 10～30 minutes.
2. according to the described pretreatment technology of claim 1, it is characterized in that described phosphating process is a normal temperature low-temperature zinc-based phosphatization technology.
3. according to the described pretreatment technology of claim 1, it is characterized in that describedly removing grease and pickling is to adopt the salt acid treatment, hydrochloric acid is the hydrochloric acid soln of 30～40 volume %, is added with the acid deoiling agent of 1～2 volume % in the hydrochloric acid soln.
4. according to the described pretreatment technology of claim 1, it is characterized in that described washing is that employing pH is 7～8 water, washing 0.5～1min.
5. according to the described pretreatment technology of claim 1, it is characterized in that described neutralization is to adopt aqueous sodium hydroxide solution, the neutralizing treatment time is 0.5～1min, and the pH value is 10～12.
6. according to the described pretreatment technology of claim 1, it is characterized in that the treatment time that described table is transferred is 0.5～1min, pH is 8～9.
7. according to the described pretreatment technology of claim 1, it is characterized in that described phosphatization is that to adopt mass percent concentration be 5%～6% zinc phosphate solution, also be added with quality permillage concentration in this solution and be 1.2 ‰～1.8 ‰ neutralizing agent and quality permillage concentration and be 1～3 ‰ promotor.
8. according to the described pretreatment technology of claim 1, it is characterized in that the process of described phosphating process is followed successively by except that grease, washing, pickling, washing, neutralization, washing, table accent, phosphatization, washing, table mediation oven dry.
9. according to the described pretreatment technology of claim 1, it is characterized in that described technology is to adopt infusion method that steel pipe is carried out pre-treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101930204A CN101671825B (en) | 2009-10-13 | 2009-10-13 | Pre-treating technique for composite metal plastic pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101930204A CN101671825B (en) | 2009-10-13 | 2009-10-13 | Pre-treating technique for composite metal plastic pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101671825A CN101671825A (en) | 2010-03-17 |
| CN101671825B true CN101671825B (en) | 2011-05-18 |
Family
ID=42019235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101930204A Active CN101671825B (en) | 2009-10-13 | 2009-10-13 | Pre-treating technique for composite metal plastic pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101671825B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878360A (en) * | 2012-09-28 | 2013-01-16 | 天津盛象塑料管业有限公司 | Method for increasing steel-plastic cohesion for steel-framed plastic composite pipes |
| CN109488814A (en) * | 2017-09-12 | 2019-03-19 | 丹阳市丹达防腐设备有限公司 | A kind of moulding process of fluoroplastics steel-lined plastic composite pipe |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102094195B (en) * | 2011-01-14 | 2012-07-18 | 中国科学院宁波材料技术与工程研究所 | Phosphating method of surface of metal material |
| CN102218388B (en) * | 2011-02-14 | 2013-07-24 | 广东联塑科技实业有限公司 | Equipment and method for pretreating inner wall of zinc-coated steel-plastic composite pipe |
| CN102181852A (en) * | 2011-03-31 | 2011-09-14 | 常州常宝精特钢管有限公司 | Method for coating cold drawn steel tube leather diaphragm |
| CN102211113A (en) * | 2011-05-04 | 2011-10-12 | 文富祥 | Process for producing variable diameter pipe |
| CN102330853B (en) * | 2011-07-26 | 2016-03-30 | 广东联塑科技实业有限公司 | A kind of external galvanized layer internal plastic coating pipe fitting and production technology thereof |
| CN102330852B (en) * | 2011-07-26 | 2016-06-15 | 广东联塑科技实业有限公司 | The production technique of a kind of external galvanized layer internal plastic coating tubing |
| CN102410408B (en) * | 2011-07-26 | 2016-03-30 | 广东联塑科技实业有限公司 | A kind of production technology without the need to secondary tapping plastic-coated pipe fitting |
| CN102560513A (en) * | 2012-02-13 | 2012-07-11 | 铃木加普腾钢丝（苏州）有限公司 | Surface treatment process for steel wire |
| CN103625038A (en) * | 2012-08-20 | 2014-03-12 | 芳源企业（上海）有限公司 | Pvc plastic soft coating metal armrest and manufacturing method thereof |
| CN103805980B (en) * | 2012-11-12 | 2016-05-04 | 中国南方航空工业(集团)有限公司 | A kind of steel-iron components phosphorous oxide metallization processes method |
| CN103056126B (en) * | 2013-01-30 | 2015-02-04 | 宋小林 | Microwave rust cleaning device |
| CN103572303B (en) * | 2013-10-24 | 2015-11-25 | 中联重机股份有限公司 | A kind of steel chemical pre-processing method and pickle solution used |
| CN103882419A (en) * | 2014-02-24 | 2014-06-25 | 宿迁华宇纺织机电有限公司 | Surface phosphatizing process of textile manufacturing machine |
| CN104278265A (en) * | 2014-09-22 | 2015-01-14 | 安徽喜洋洋儿童用品有限公司 | Rapid phosphorization process of steel tube for baby carriage |
| CN104454996A (en) * | 2014-11-05 | 2015-03-25 | 芜湖金龙模具锻造有限责任公司 | Anti-corrosion treatment method for sliding bearing shaft sleeve |
| CN106119874A (en) * | 2016-06-23 | 2016-11-16 | 巢湖鹏远金属焊管有限公司 | A kind of preprocess method of spiral welded pipe processing steel band |
| CN106111426A (en) * | 2016-08-29 | 2016-11-16 | 永康市恒久涂装设备有限公司 | A kind of ABS plastic profiled member finishing system |
| CN109731760A (en) * | 2019-03-04 | 2019-05-10 | 杭州柯洛建材科技有限公司 | A kind of lacquer spraying technique of Chinese style ancient architecture aluminium alloy element |
| CN111676471A (en) * | 2020-07-31 | 2020-09-18 | 江苏北特汽车零部件有限公司 | Phosphating process of diesel injector body made of 42CrMo material |
| CN113441373A (en) * | 2020-09-27 | 2021-09-28 | 海口锦嘉成实业有限公司 | Steel formwork rust-proof corrosion-resistant processing method |
| CN115537797B (en) * | 2022-10-09 | 2023-09-29 | 徐州二川机械有限公司 | Phosphating pretreatment process for engineering machinery oil tank |
-
2009
- 2009-10-13 CN CN2009101930204A patent/CN101671825B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878360A (en) * | 2012-09-28 | 2013-01-16 | 天津盛象塑料管业有限公司 | Method for increasing steel-plastic cohesion for steel-framed plastic composite pipes |
| CN109488814A (en) * | 2017-09-12 | 2019-03-19 | 丹阳市丹达防腐设备有限公司 | A kind of moulding process of fluoroplastics steel-lined plastic composite pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101671825A (en) | 2010-03-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101671825B (en) | Pre-treating technique for composite metal plastic pipe | |
| CN101935832B (en) | Zinc-iron metal alramenting liquid capable of being recycled at normal temperature | |
| CN103668151A (en) | Pretreatment process of low-carbon steel pipe | |
| KR101319078B1 (en) | Methods for passivating a metal substrate and related coated metal substrates | |
| EP2529041B1 (en) | Painting pre-treatment processes with low environmental impact, as an alternative to conventional phosphating treatments | |
| CN101864564B (en) | High corrosion-resistance black phosphating process | |
| CN102959127A (en) | Method for selectively phosphating composite metal construction | |
| CN102639750A (en) | Multi-stage pre-treatment method for metal components having zinc and iron surfaces | |
| CN102534591B (en) | Thick film phosphating method | |
| CN105779988A (en) | Chromate-free passivation solution for electroplated zinc and passivation technology thereof | |
| CN101135050B (en) | Metasilicate cleaning inactivating process | |
| CN105643208A (en) | Production process suitable for high-strength round link chain under marine environment | |
| CN104711560A (en) | Novel medium-temperature zinc-manganese system phosphating agent and production method thereof | |
| CN104278261A (en) | Environment-friendly type phosphate concentrated liquor for removing rust and iron oxide scales and phosphating and application of environment-friendly type phosphate concentrated liquor | |
| KR20200121310A (en) | Method for selective phosphateization of composite metal structures | |
| US5516372A (en) | Process for phosphating steel strip galvanized on one side | |
| CN100432291C (en) | New type environmental protective metal finishing liquid, and processing method | |
| KR910002568B1 (en) | Phosphating process for zinc-plated metals | |
| CN1034681C (en) | Method for making manganese-containing zinc phosphate layer on surface of zinc-plated steel | |
| CN104711559A (en) | Normal-temperature rapid phosphatizing agent with excellent corrosion resistance and production method thereof | |
| CN1043962A (en) | A kind of novel passivating solution and preparation method thereof | |
| CN102560459A (en) | Phosphorizing liquid for phosphorization of thick film | |
| CN104711563A (en) | Composite phosphatizing agent with degreasing rust-removing phosphatization functions, and production method thereof | |
| CN103088324A (en) | Phosphating solution for corrosion prevention of iron towers and preparation method thereof | |
| CN102628167A (en) | Uniform phosphorizing technology for surface coating of steel tube |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |