CN105088218A - Metal surface coating technology - Google Patents
Metal surface coating technology Download PDFInfo
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- CN105088218A CN105088218A CN201510580095.3A CN201510580095A CN105088218A CN 105088218 A CN105088218 A CN 105088218A CN 201510580095 A CN201510580095 A CN 201510580095A CN 105088218 A CN105088218 A CN 105088218A
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Abstract
The invention discloses a metal surface coating technology solving the problems that in the prior art, environmental protection can not be achieved and coating quality is poor. According to the technical scheme, the metal surface coating technology is characterized in that cleaning liquid and pickling liquor are mixed into combined liquid which is used for treating the surface of a metal workpiece, wherein the cleaning liquid includes, by weight, 45-50 parts of emulsifiers, 8-10 parts of permeating agents and 20-24 parts of water; the metal workpiece is subjected to water washing twice after being cleaned through the combined liquid; the metal workpiece washed with water is activated; the metal workpiece is washed with water twice after being activated; silane treatment is carried out on the metal workpiece after the metal workpiece is washed with water again; and the metal workpiece is coated after being roasted and dried.
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 process and chemical method by treatment process, and mechanical process the zone of oxidation of metallic surface, paint and rust is removed by methods such as manual method, power 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 metallic surface before application, improves sticking power and the anti-corrosion capability of paint film layer; Antifriction lubrication is played in metal cold complete processing.The bottoming of current use is all cover one deck phosphatize phosphate coat by phosphatization in metallic surface, or namely use chromatedsolution and metal function to generate trivalent or sexavalence chromizing layer in metallic surface by chromaking, but all there is larger defect in above two kinds for the treatment of processs: environment compatibility is poor and use cost is high.And due to phosphatization needs table tune, and need after chromaking repeatedly to clean workpiece, when causing using phosphatization and chromaking to carry out bottoming to metallic surface, there is long flow path, defect that production efficiency is low, and also there is the problem that energy consumption is high and environmental pollution is serious in phosphatization and chromaking.
Application number be 201110446471.1 Chinese patent disclose a kind of silane agent that adopts metalwork surface protected separately, first metal works is carried out skimming treatment, then twice washing is carried out, carry out polishing rust cleaning again, again wash, use caustic dip again, wash again, metal works dipping silanization treating agent after washing, then it is allowed to solidify, solidification terminates, be dipped into again in acrylic resin soln, after several minutes, taking-up dries up, this invented technology, simple to operate, treatment agent stable performance used, environmental protection, effectively instead of phosphatization and chromaking technology.
But polishing rust cleaning mode and be not suitable for all metal works, for some have corner, the metal works such as tubular polishing difficulty and cannot polish due to some dead angles and cause rust and surface film oxide cleaning not exclusively, cause follow-up silane treatment poor effect and affect follow-up painting effect, reduce application work-ing life, in addition, also there is the defects such as antiseptic property is not strong, film forming is uneven, adhesive ability is poor in existing silane finish, also can affect 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 painting effect excellent and the metal surface coating process of environmental protection.
For achieving the above object, the invention provides following technical scheme: a kind of metal surface coating process, is characterized in that, comprises step:
A kind of metal surface coating process, is characterized in that, comprise step:
(1) two closes liquid cleaning, and use scavenging solution and pickle solution to be mixed into two close liquid carries out degreasing and rust cleaning, oxide film dissolving to surface of workpiece; Described two close the cleaning agent formula used in liquid cleaning is: with parts by weight, emulsifying agent 45-50 part, permeate agent 8-10 part, water 20-24 part;
(2) twice washing is carried out to the metal works after two close liquid cleaning;
(3) activate, the metal works after washing is carried out activation treatment;
(4) again twice washing is carried out to the metal works through activation treatment;
(5) silane treatment, by again through washing after metal works be impregnated in silane treatment agent solution, or by silane finish solution spraying, be coated to surface treated workpiece surface;
(6) toast, the metal works after silane treatment is toasted;
(7) application, carries out application to through the dried metal works of overbaking.
By adopting technique scheme, use scavenging solution degreasing, pickle solution rust cleaning and oxide film, and corrosion can caused to metal body in degreasing and descaling process, after metal works is corroded, the residue class material that one deck water is difficult to wash off is often left on its surface, they can affect follow-up silane treatment and application, therefore first this layer of residue is removed by activation before silane treatment, again by the adhesion property of silane treatment paint vehicle when surface of workpiece covers antiseptic property and the application of last layer polymer permeable membrane raising metal works, finally dry metal works and application is carried out to metal works.And the scavenging solution used in the present invention not phosphate-containing and other heavy metal ion, environmental protection, pollution-free, environmental protection three wastes requirement discharge can be met.
The present invention is set to further: the parts by weight formula of the silane finish used in described silane treatment is for being silane coupling agent 20 ~ 30 parts, thickening material 20 ~ 30 parts, Trisodium Citrate 5 ~ 7 parts, pure water 15 ~ 23 parts; Wherein, described silane coupling agent is two amino silicane coupling agents, and described pair of amino silicane coupling agent is N-(β-aminoethyl-γ-aminopropyl) methyl dimethoxysilane, and described thickening material is Natvosol.
By adopting technique scheme, secondly, by finding after great many of experiments, reduce the content of pure water, and the content adding thickening material and increase silane coupling agent can make Metal surface silane treatment agent of the present invention accomplish high enrichment, only need use with water wiring solution-forming with the ratio of 0.2 ‰ in use, silane treatment of the present invention is entered easy to carry, storage occupation of land is little; Meanwhile, by the use of Trisodium Citrate while complexing, can make solution and silane film more stable, stop sedimentary generation in water, make production unit keep clean, do not produce hard scale.
In addition, because thickening material also can be used as film coalescence aid, the speed of Metal surface silane treatment agent at metallic surface formation permeable membrane is increased, only needs to form a kind of nano-high molecule permeable membrane in metallic surface in 3 ~ 5 seconds, there is the advantage of high timeliness; And, improve the performance of permeable membrane, strengthen viscosity and the film forming uniformity coefficient of permeable membrane, the permeable membrane formed in metallic 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, sticking power all technical are excellent.
The present invention is set to further: the solution pH value that described silane finish is mixed with controls as 6.8-7.5.
By adopting technique scheme, compared with needing under the acidic conditions of control PH at 4-6 with existing silane finish, it is 6.8-7.5 that the silane finish that this formula is arranged uses PH to require, therefore use 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 storing temperature is 180-200 DEG C.
In sum, a kind of metal surface coating process of the present invention has more environmental protection, high financial profit, surface treatment without dead angle, the advantage that production efficiency is high and the application life-span is long.
Accompanying drawing explanation
Fig. 1 is a kind of schema of metal surface coating process.
Embodiment
With reference to Fig. 1, a kind of metal surface coating process of the present invention is described further.
Embodiment one:
A kind of metal surface coating process, is characterized in that, comprise step:
(1) two closes liquid cleaning, first uses sulfuric acid, nitric acid and mixed in hydrochloric acid to be mixed with Acidwash solution, then in Acidwash solution, adds clean-out system; Described two close the cleaning agent formula used in liquid cleaning is: with parts by weight, emulsifying agent 47 parts, permeate agent 9 parts, 22 parts, water;
(2) twice washing is carried out to the metal works after two close liquid cleaning;
(3) activate, the metal works after washing is carried out activation treatment;
(4) again twice washing is carried out to the metal works through activation treatment;
(5) silane treatment, with the proportions silane treatment agent solution of 0.2 ‰, and the pH value controlling solution controls 6.8, by silane finish solution spraying to surface treated surface of workpiece, spray time is 5 seconds, and the parts by weight formula of the silane finish wherein used in silane treatment is for being silane coupling agent 25 parts, polyurethane thickening material 30 parts, Trisodium Citrate 5 parts, pure water 23 parts;
(6) toast, toast the metal works after silane treatment, baking time is 15 minutes, and storing temperature is 180 DEG C;
(7) application, carries out application to through the dried metal works of overbaking.
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 | sticking power | 1 grade |
| 5 | flexibility | 1mm |
| 6 | under shock-resistant | 100cm |
| 7 | solidity to corrosion | 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, is characterized in that, comprise step:
(1) two closes liquid cleaning, first uses sulfuric acid, nitric acid or hydrochloric acid to be mixed with Acidwash solution, then in Acidwash solution, adds clean-out system; Described two close the cleaning agent formula used in liquid cleaning is: with parts by weight, emulsifying agent 46 parts, permeate agent 9 parts, 21 parts, water;
(2) twice washing is carried out to the metal works after two close liquid cleaning;
(3) activate, the metal works after washing is carried out activation treatment;
(4) again twice washing is carried out to the metal works through activation treatment;
(5) silane treatment, with the proportions silane treatment agent solution of 0.2 ‰, and the pH value controlling solution controls 6.9, surface treated metal works is impregnated in silane treatment agent solution and takes out after 4 seconds, the parts by weight formula of the silane finish wherein used in silane treatment is for being silane coupling agent 25 parts, thickening material 25 parts, Trisodium Citrate 6 parts, pure water 19 parts;
(6) toast, toast the metal works after silane treatment, baking time is 12 minutes, and storing temperature is 190 DEG C;
(7) application, carries out application to through the dried metal works of overbaking.
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 | sticking power | 1 grade |
| 5 | flexibility | 1mm |
| 6 | under shock-resistant | 100cm |
| 7 | solidity to corrosion | 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, is characterized in that, comprise step:
(1) two closes liquid cleaning, first uses sulfuric acid, nitric acid and mixed in hydrochloric acid to be mixed with Acidwash solution, then in Acidwash solution, adds clean-out system; Described two close the cleaning agent formula used in liquid cleaning is: with parts by weight, emulsifying agent 45 parts, permeate agent 8 parts, 20 parts, water;
(2) twice washing is carried out to the metal works after two close liquid cleaning;
(3) activate, the metal works after washing is carried out activation treatment;
(4) again twice washing is carried out to the metal works through activation treatment;
(5) silane treatment, with the proportions 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 for the parts by weight formula for: the silane finish wherein used in silane treatment is for being silane coupling agent 27 parts, polyurethane thickening material 20 parts, Trisodium Citrate 7 parts, pure water 15 parts;
(6) toast, toast the metal works after silane treatment, baking time is 10 minutes, and storing temperature is 200 DEG C;
(7) application, carries out application to through the dried metal works of overbaking.
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 | sticking power | 1 grade |
| 5 | flexibility | 1mm |
| 6 | under shock-resistant | 100cm |
| 7 | solidity to corrosion | 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, is characterized in that, comprise step:
(1) two closes liquid cleaning, first uses sulfuric acid, nitric acid or hydrochloric acid to be mixed with Acidwash solution, then in Acidwash solution, adds clean-out system; Described two close the cleaning agent formula used in liquid cleaning is: with parts by weight, emulsifying agent 50 parts, permeate agent 10 parts, 24 parts, water;
(2) twice washing is carried out to the metal works after two close liquid cleaning;
(3) activate, the metal works after washing is carried out activation treatment;
(4) again twice washing is carried out to the metal works through activation treatment;
(5) silane treatment, with the proportions 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 for the parts by weight formula for: the silane finish wherein used in silane treatment is for being silane coupling agent 20 parts, polyurethane thickening material 29 parts, Trisodium Citrate 5 parts, pure water 23 parts;
(6) toast, toast the metal works after silane treatment, baking time is 13 minutes, and storing temperature is 185 DEG C;
(7) application, carries out application to through the dried metal works of overbaking.
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 | sticking power | 1 grade |
| 5 | flexibility | 1mm |
| 6 | under shock-resistant | 100cm |
| 7 | solidity to corrosion | 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:
(1) two closes liquid cleaning, and use scavenging solution and pickle solution to be mixed into two close liquid carries out degreasing and rust cleaning, oxide film dissolving to surface of workpiece; Described two close the cleaning agent formula used in liquid cleaning is: with parts by weight, emulsifying agent 45-50 part, permeate agent 8-10 part, water 20-24 part;
(2) twice washing is carried out to the metal works after two close liquid cleaning;
(3) activate, the metal works after washing is carried out activation treatment;
(4) again twice washing is carried out to the metal works through activation treatment;
(5) silane treatment, by again through washing after metal works be impregnated in silane treatment agent solution, or by silane finish solution spraying, be coated to surface treated workpiece surface;
(6) toast, the metal works after silane treatment is toasted;
(7) application, carries out application to through the dried metal works of overbaking.
2. a kind of metal surface coating process according to claim 1, it is characterized in that: the parts by weight formula of the silane finish used in described silane treatment is for being silane coupling agent 20 ~ 30 parts, thickening material 20 ~ 30 parts, Trisodium Citrate 5 ~ 7 parts, pure water 15 ~ 23 parts.
3. metal surface coating process according to claim 2, is characterized in that: state silane coupling agent for two amino silicane coupling agent, described thickening material is Natvosol.
4. a kind of metal surface coating process according to claim 2, is characterized in that: the solution pH value that described silane finish is mixed with controls as 6.8-7.5.
5. a kind of 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. a kind of 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. a kind of metal surface coating process according to claim 1, is characterized in that: described baking time is 10-15 minute, and described storing temperature is 180-200 DEG C.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586587A (en) * | 2016-03-25 | 2016-05-18 | 大连新锋钢管厂 | Hoop surface protection process |
| CN108031634A (en) * | 2017-11-30 | 2018-05-15 | 安徽雷萨重工机械有限公司 | A kind of sheet metal pretreatment to the coating method |
| CN109487259A (en) * | 2018-12-28 | 2019-03-19 | 浙江五源科技股份有限公司 | The preparation method of Chrome-free silane film before a kind of aluminium coil painting |
| CN111482345A (en) * | 2020-03-18 | 2020-08-04 | 安徽昌发实业有限公司 | Surface corrosion-resistant treatment process for iron artware |
| CN112337770A (en) * | 2020-11-19 | 2021-02-09 | 马鞍山市三川机械制造有限公司 | Preparation method of steel structure material surface coating |
| 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 |
| CN113388315A (en) * | 2021-04-25 | 2021-09-14 | 中国科学院福建物质结构研究所 | Graphene/resin composite coating and preparation method of graphene/resin composite coating |
| CN113414087A (en) * | 2021-06-21 | 2021-09-21 | 嘉兴敏实机械有限公司 | Non-electrophoretic coating process for stainless steel decorative strip |
| CN114226205A (en) * | 2021-12-14 | 2022-03-25 | 杭州易博乐科技有限公司 | Water-washing-free process for coating metal surface |
| CN114592188A (en) * | 2022-03-10 | 2022-06-07 | 常州市春雷浩宇环保科技有限公司 | Vitrification process |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586587A (en) * | 2016-03-25 | 2016-05-18 | 大连新锋钢管厂 | Hoop surface protection process |
| CN108031634A (en) * | 2017-11-30 | 2018-05-15 | 安徽雷萨重工机械有限公司 | A kind of sheet metal pretreatment to the coating method |
| CN109487259A (en) * | 2018-12-28 | 2019-03-19 | 浙江五源科技股份有限公司 | The preparation method of Chrome-free silane film before a kind of aluminium coil painting |
| CN111482345A (en) * | 2020-03-18 | 2020-08-04 | 安徽昌发实业有限公司 | Surface corrosion-resistant treatment process for iron artware |
| CN112337770A (en) * | 2020-11-19 | 2021-02-09 | 马鞍山市三川机械制造有限公司 | Preparation method of steel structure material surface coating |
| 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 |
| CN113388315A (en) * | 2021-04-25 | 2021-09-14 | 中国科学院福建物质结构研究所 | Graphene/resin composite coating and preparation method of graphene/resin composite coating |
| CN113414087A (en) * | 2021-06-21 | 2021-09-21 | 嘉兴敏实机械有限公司 | Non-electrophoretic coating process for stainless steel decorative strip |
| CN114226205A (en) * | 2021-12-14 | 2022-03-25 | 杭州易博乐科技有限公司 | Water-washing-free process for coating metal surface |
| CN114592188A (en) * | 2022-03-10 | 2022-06-07 | 常州市春雷浩宇环保科技有限公司 | Vitrification process |
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