CN105149192A - Metal surface coating process - Google Patents
Metal surface coating process Download PDFInfo
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- CN105149192A CN105149192A CN201510576902.4A CN201510576902A CN105149192A CN 105149192 A CN105149192 A CN 105149192A CN 201510576902 A CN201510576902 A CN 201510576902A CN 105149192 A CN105149192 A CN 105149192A
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Abstract
The invention discloses a metal surface coating process. The process sequentially comprises the steps of surface treatment, wherein the surface of a metal workpiece is ground through sand blasting and shot blasting, an oxide film, rust and paint on the metal surface are removed, the surface of the metal workpiece can obtain certain cleanliness, meanwhile, the roughness of the metal surface is improved, and the mechanical property of the surface of the metal workpiece is improved; silane treatment, wherein the workpiece obtained after the surface treatment is impregnated into a silane treating agent solution, or the silane treating agent solution is sprayed or applied to the surface of the workpiece obtained after the surface treatment; baking, wherein the metal workpiece obtained after the silane treatment is baked; coating, wherein coating is conducted on the metal workpiece obtained after the baking drying. By means of the metal surface coating process, the problems that in the prior art, processes in which phosphatization or chromizing is used are long, the production efficiency is low, the coating effect is poor, the energy consumption is high, and environmental pollution is severe are solved.
Description
Technical field
The present invention relates to field of metal surface treatment, more particularly, it relates to a kind of metal surface coating process.
Background technology
Coating metal surfaces is generally divided into two parts: one is metallic surface process before application, is also pretreatment technology; Two is construction technologies of application.Surface treatment is divided into Mechanical Method and chemical method by processing method, and Mechanical Method the oxide layer of metal surface, paint and rust is removed by methods such as manual method, electric tool, flame method or sandblasting ball blasts; And chemical rule carries out oil removing, rust cleaning, clean process by the mode of chemical reaction.Surface treatment must well with the bad quality that directly affect application, being related to antirust ability and the life-span of metal works, is a very important important step.
Metal is carrying out application after surface treatment, and usually can carry out bottoming to metal surface before application, improves adhesive force and the anti-corrosion capability of paint film layer; Antifriction lubrication is played in metal cold processing technology.The bottoming of current use is all cover one deck phosphating coat by phosphatization in metal surface, or namely use chromatedsolution and metal function to generate trivalent or sexavalence chromizing layer in metal surface by chromaking, but all there is larger defect in above two kinds of processing methods: environment compatibility is poor and use cost is high.Environmental hazard: phosphatization containing heavy metal ion such as zinc, manganese, nickel and containing a large amount of phosphorus, and uses nitrite to do promoter in production and application process, is serious carcinogen.The chromium (VI) of chromaking process inherently containing serious toxicity, due to the promulgation about the dangerous regulation of heavy metal, will disabled (European Union be in total ban in July, 2007 chromium (VI) use in Treatment of Metal Surface) in a lot of field containing the processing method of chromium (VI).Whether use cost is high: can produce a large amount of phosphatization slag in Phosphating Treatment Process, needs a set of deslagging device to support the use with it, running check nozzle and pipeline to block, cleaning sediment etc. of stopping work.And phosphatization serviceability temperature is mostly 30-50 DEG C, ancillary heating equipment and thermal source is therefore also needed to heat Phosphating Slot.The sewage of phosphatization and the discharge of chromaking technique needs the process of high cost just can reach discharge standard simultaneously.
Occur at present using silane finish to replace phosphatization and chromaking process, although use existing silane finish process to solve problem of environmental pollution, but also there is the defects such as antiseptic property is not strong, film forming is uneven, adhesive ability is poor in existing silane finish, affects painting effect.
Summary of the invention
For the deficiency that prior art exists, the object of the present invention is to provide a kind of environmental protection no pollution, production efficiency high and the metal surface coating process that painting effect is excellent.
For achieving the above object, the invention provides following technical scheme: a kind of metal surface coating process, comprises the following steps:
(1) surface treatment, by the surface of sandblasting ball blast polishing metal works, on removing metal surface oxide-film, embroidery and paint, improve the roughness of metal surface while making the surface of metal works obtain certain cleannes, the mechanical performance of surface of workpiece improved;
(2) silane treatment, is impregnated into surface treated metal works in silane treatment agent solution, or by silane finish solution spraying, be coated to surface treated surface of workpiece;
(3) toast, the metal works after silane treatment is toasted;
(4) application, carries out application to through the dried metal works of overbaking.
By adopting technique scheme, first by sandblasting ball blast, preliminary treatment is carried out to surface of workpiece, improve the roughness of surface of workpiece simultaneously, again the metal works after sandblasting ball blast is carried out silane treatment and cover the last layer macromolecule permeable membrane raising antiseptic property of metal works and the adhesion property of application paint vehicle at surface of workpiece, finally dry metal works and application is carried out to metal works.The present invention replaces original phosphatization and chromaking process by silane treatment, because silane treatment is not containing any heavy metal, and only need add silane finish after using a period of time, do not need often to drag for slag, clear barrel reason, make metal surface coating process of the present invention can realize non-wastewater discharge, zero environmental.
The present invention is set to further: the parts by weight formula of the silane finish used in described silane treatment is: silane coupler 20 ~ 30 parts, thickener 20 ~ 30 parts, natrium citricum 5 ~ 7 parts, pure water 15 ~ 23 parts; Wherein, described silane coupler is two amino silicane coupling agents, and described pair of amino silicane coupling agent is N-(β-aminoethyl-γ-aminopropyl) methyl dimethoxysilane, and described thickener is hydroxyethylcellulose.
By adopting technique scheme, by finding after great many of experiments, reduce the content of pure water, and the content adding thickener and increase silane coupler can make Metal surface silane treatment agent of the present invention accomplish high enrichment, in use only need with 0.2 ‰ ratio and water wiring solution-forming use, silane treatment of the present invention is entered easy to carry, store occupation of land little; Meanwhile, by the use of natrium citricum while complexing, can make solution and silane film more stable, stop sedimentary generation in water, make production equipment keep clean, do not produce hard scale.
In addition, because thickener also can be used as coalescents, the speed of Metal surface silane treatment agent at metal surface formation permeable membrane is increased, only needs to form a kind of nano-high molecule permeable membrane in metal surface in 3 ~ 5 seconds, there is the advantage of high timeliness; And, the use of thickener also improves the performance of permeable membrane, strengthen viscosity and the film forming uniformity of permeable membrane, the permeable membrane formed in metal surface by the present invention is made to have good quality, antiseptic property is excellent, and even film layer is continuous, without dust, hangs white image, laminin material itself, corrosion protection, adhesive force all technical are excellent.
The present invention is set to further: the solution pH value that described silane finish is configured to controls as 6.8-7.5.
By adopting technique scheme, it is 6.8-7.5 that the silane finish that lid formula is arranged uses PH to require, therefore uses the metal works after the process of this silane finish can not need washing or neutralization procedure, enormously simplify the production cycle of operation easier and technique.
The present invention is set to further: in described silane treatment agent solution, the concentration of silane finish is 0.2 ‰.
The present invention is set to further: in described silane treatment process, metal works dipping or spray time are 3-5 second.
The present invention is set to further: described baking time is 10-15 minute, and described baking temperature is 180-200 DEG C.
In sum, metal surface coating process of the present invention has non-wastewater discharge, zero environmental, and technological process is short, and production efficiency is high, the advantage that coating quality is excellent.
Detailed description of the invention
In conjunction with specific embodiments metal surface coating process of the present invention is described further.
Embodiment one:
A kind of metal surface coating process, comprises the following steps:
(1) surface treatment, by the surface of sandblasting ball blast polishing metal works, on removing metal surface oxide-film, embroidery and paint, improve the roughness of metal surface while making the surface of metal works obtain certain cleannes, the mechanical performance of surface of workpiece improved;
(2) silane treatment, with the proportional arrangement silane treatment agent solution of 0.2 ‰, and the pH value controlling solution controls 6.8, and by silane finish solution spraying to surface treated surface of workpiece, spray time is 5 seconds; The parts by weight formula of the silane finish wherein used in silane treatment is: silane coupler 25 parts, Polyurethane thickener 30 parts, natrium citricum 5 parts, pure water 23 parts;
(3) toast in the metal works feeding baking box after silane treatment, baking time is 15 minutes, and baking temperature is 180 DEG C;
(4) application, carries out application to through the dried metal works of overbaking, and application paint vehicle used is determined according to metal work piece materials and purposes.
Table 1, the film performance index that embodiment one is formed on 08f steel surface
| sequence number | project | index |
| 1 | rete outward appearance | in metal material true qualities |
| 2 | thicknesses of layers | 247nm |
| 3 | indoor rust-proof life | 107 days |
| 4 | adhesive force | 1 grade |
| 5 | flexibility | 1mm |
| 6 | under shock-resistant | 100cm |
| 7 | corrosion resistance | ironware neutral salt spray test: 500 hours paint films without coming off, bubble, the phenomenon such as to get rusty; Aluminum component acetic acid salt spray is tested: 1000 hours. |
Embodiment two:
A kind of metal surface coating process, comprises the following steps:
(1) surface treatment, by the surface of sandblasting ball blast polishing metal works, on removing metal surface oxide-film, embroidery and paint, improve the roughness of metal surface while making the surface of metal works obtain certain cleannes, the mechanical performance of surface of workpiece improved;
(2) silane treatment, with the proportional arrangement silane treatment agent solution of 0.2 ‰, and the pH value controlling solution controls 6.9, is impregnated in silane treatment agent solution by surface treated metal works and takes out after 4 seconds; The parts by weight formula of the silane finish wherein used in silane treatment is: silane coupler 25 parts, Polyurethane thickener 25 parts, natrium citricum 6 parts, pure water 19 parts;
(3) toast in the metal works feeding baking box after silane treatment, baking time is 12 minutes, and baking temperature is 190 DEG C;
(4) application, carries out application to through the dried metal works of overbaking, and application paint vehicle used is determined according to metal work piece materials and purposes.
Table 2, the film performance index that embodiment two is formed on 08f steel surface
| sequence number | project | index |
| 1 | rete outward appearance | in metal material true qualities |
| 2 | thicknesses of layers | 264nm |
| 3 | indoor rust-proof life | 103 days |
| 4 | adhesive force | 1 grade |
| 5 | flexibility | 1mm |
| 6 | under shock-resistant | 100cm |
| 7 | corrosion resistance | ironware neutral salt spray test: 500 hours paint films without coming off, bubble, the phenomenon such as to get rusty; Aluminum component acetic acid salt spray is tested: 1000 hours. |
Embodiment three:
A kind of metal surface coating process, comprises the following steps:
(1) surface treatment, by the surface of sandblasting ball blast polishing metal works, on removing metal surface oxide-film, embroidery and paint, improve the roughness of metal surface while making the surface of metal works obtain certain cleannes, the mechanical performance of surface of workpiece improved;
(2) silane treatment, with the proportional arrangement silane treatment agent solution of 0.2 ‰, and the pH value controlling solution controls 7.3, is impregnated in silane treatment agent solution by surface treated metal works and takes out after 5 seconds; The parts by weight formula of the silane finish wherein used in silane treatment is: silane coupler 27 parts, Polyurethane thickener 20 parts, natrium citricum 7 parts, pure water 15 parts;
(3) toast in the metal works feeding baking box after silane treatment, baking time is 10 minutes, and baking temperature is 200 DEG C;
(4) application, carries out application to through the dried metal works of overbaking, and application paint vehicle used is determined according to metal work piece materials and purposes.
Table 3, the film performance index that embodiment three is formed on 08f steel surface
| sequence number | project | index |
| 1 | rete outward appearance | in metal material true qualities |
| 2 | thicknesses of layers | 285nm |
| 3 | indoor rust-proof life | 111 days |
| 4 | adhesive force | 1 grade |
| 5 | flexibility | 1mm |
| 6 | under shock-resistant | 100cm |
| 7 | corrosion resistance | ironware neutral salt spray test: 500 hours paint films without coming off, bubble, the phenomenon such as to get rusty; Aluminum component acetic acid salt spray is tested: 1000 hours. |
Embodiment four:
A kind of metal surface coating process, comprises the following steps:
(1) surface treatment, by the surface of sandblasting ball blast polishing metal works, on removing metal surface oxide-film, embroidery and paint, improve the roughness of metal surface while making the surface of metal works obtain certain cleannes, the mechanical performance of surface of workpiece improved;
(2) silane treatment, with the proportional arrangement silane treatment agent solution of 0.2 ‰, and the pH value controlling solution controls 7.5, by silane finish solution spraying, is coated to surface treated surface of workpiece, sprays and takes out after 3 seconds; The parts by weight formula of the silane finish wherein used in silane treatment is: silane coupler 20 parts, Polyurethane thickener 29 parts, natrium citricum 5 parts, pure water 23 parts;
(3) toast in the metal works feeding baking box after silane treatment, baking time is 13 minutes, and baking temperature is 185 DEG C;
(4) application, carries out application to through the dried metal works of overbaking, and application paint vehicle used is determined according to metal work piece materials and purposes.
Table 4, the film performance index that embodiment four is formed on 08f steel surface
| sequence number | project | index |
| 1 | rete outward appearance | in metal material true qualities |
| 2 | thicknesses of layers | 256nm |
| 3 | indoor rust-proof life | 107 days |
| 4 | adhesive force | 1 grade |
| 5 | flexibility | 1mm |
| 6 | under shock-resistant | 100cm |
| 7 | corrosion resistance | ironware neutral salt spray test: 500 hours paint films without coming off, bubble, the phenomenon such as to get rusty; Aluminum component acetic acid salt spray is tested: 1000 hours. |
The above is only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (7)
1. a metal surface coating process, is characterized in that, comprises step:
Surface treatment, by the surface of sandblasting ball blast polishing metal works;
Silane treatment, is impregnated into surface treated metal works in silane treatment agent solution, or by silane finish solution spraying, be coated to surface treated surface of workpiece;
Baking, toasts the metal works after silane treatment;
Application, carries out application to through the dried metal works of overbaking.
2. metal surface coating process according to claim 1, is characterized in that: the parts by weight formula of the silane finish used in described silane treatment is: silane coupler 20 ~ 30 parts, thickener 20 ~ 30 parts, natrium citricum 5 ~ 7 parts, pure water 15 ~ 23 parts.
3. metal surface coating process according to claim 2, is characterized in that: described silane coupler is two amino silicane coupling agent, and described thickener is hydroxyethylcellulose.
4. metal surface coating process according to claim 2, is characterized in that: the solution pH value that described silane finish is configured to controls as 6.8-7.5.
5. metal surface coating process according to claim 2, is characterized in that: in described silane treatment agent solution, the concentration of silane finish is 0.2 ‰.
6. metal surface coating process according to claim 1, is characterized in that: in described silane treatment process, metal works dipping or spray time are 3-5 second.
7. metal surface coating process according to claim 1, is characterized in that: described baking time is 10-15 minute, and described baking temperature is 180-200 DEG C.
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| CN201510576902.4A CN105149192A (en) | 2015-09-12 | 2015-09-12 | Metal surface coating process |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106221565A (en) * | 2016-08-27 | 2016-12-14 | 合肥普庆新材料科技有限公司 | A kind of preparation method of the reinforcing agent for strengthening chromium-free fingerprint-resistant plate powder coating adhesive force |
| CN107400883A (en) * | 2017-08-03 | 2017-11-28 | 浙江五源科技股份有限公司 | Silane/zirconium composite treating agent and preparation method thereof before galvanized sheet application |
| CN107442365A (en) * | 2017-08-31 | 2017-12-08 | 中潜股份有限公司 | Coating machine for diving dress production |
| CN108841323A (en) * | 2018-06-05 | 2018-11-20 | 陈太师 | A kind of steel silane finish |
| CN109261735A (en) * | 2018-08-24 | 2019-01-25 | 太仓久进汽车零部件有限公司 | The lubrication processing method of metal surface |
| CN110976236A (en) * | 2020-01-03 | 2020-04-10 | 湖南飞沃新能源科技股份有限公司 | Surface treatment method for wind power threaded sleeve |
| CN113000343A (en) * | 2021-02-20 | 2021-06-22 | 上海阿尔斯通交通电气有限公司 | Metal surface coating process |
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| CN101386990A (en) * | 2007-09-12 | 2009-03-18 | 浙江工贸职业技术学院 | Environment-friendly type metal normal temperature surface preservative treatment technique |
| CN103938199A (en) * | 2014-04-24 | 2014-07-23 | 湖南金裕化工有限公司 | Chromium-free coating agent and preparation method thereof |
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2015
- 2015-09-12 CN CN201510576902.4A patent/CN105149192A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101386990A (en) * | 2007-09-12 | 2009-03-18 | 浙江工贸职业技术学院 | Environment-friendly type metal normal temperature surface preservative treatment technique |
| CN103938199A (en) * | 2014-04-24 | 2014-07-23 | 湖南金裕化工有限公司 | Chromium-free coating agent and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106221565A (en) * | 2016-08-27 | 2016-12-14 | 合肥普庆新材料科技有限公司 | A kind of preparation method of the reinforcing agent for strengthening chromium-free fingerprint-resistant plate powder coating adhesive force |
| CN107400883A (en) * | 2017-08-03 | 2017-11-28 | 浙江五源科技股份有限公司 | Silane/zirconium composite treating agent and preparation method thereof before galvanized sheet application |
| CN107400883B (en) * | 2017-08-03 | 2019-08-27 | 浙江五源科技股份有限公司 | Silane/zirconium composite treating agent and preparation method thereof before galvanized sheet coating |
| CN107442365A (en) * | 2017-08-31 | 2017-12-08 | 中潜股份有限公司 | Coating machine for diving dress production |
| CN108841323A (en) * | 2018-06-05 | 2018-11-20 | 陈太师 | A kind of steel silane finish |
| CN109261735A (en) * | 2018-08-24 | 2019-01-25 | 太仓久进汽车零部件有限公司 | The lubrication processing method of metal surface |
| CN110976236A (en) * | 2020-01-03 | 2020-04-10 | 湖南飞沃新能源科技股份有限公司 | Surface treatment method for wind power threaded sleeve |
| CN113000343A (en) * | 2021-02-20 | 2021-06-22 | 上海阿尔斯通交通电气有限公司 | Metal surface coating process |
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Application publication date: 20151216 |