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Ceramization agent for electrophoretic coating pretreatment, preparation method and usage method for ceramization agent

An electrophoretic coating and pre-treatment technology, applied in the direction of metal material coating process, etc., can solve the problems of limited types and limited scope of use, and achieve the effect of improving bonding, excellent effect and good conductivity

Active Publication Date: 2017-05-24
芜湖市瑞杰环保材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the application of a single silane treatment agent in the pretreatment of metal surfaces is still in the research and development stage.
[0004] Although the vitrification agent is generally recognized in the home appliance industry, it has not been widely used in other industries. The main reason is that the film layer formed by compounding zirconium salt and silane coupling agent and the bonding force of the organic coating are only in some parts. The performance is better in coatings, and the types of silane coupling agents suitable for coatings are limited, which greatly limits its scope of use

Method used

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  • Ceramization agent for electrophoretic coating pretreatment, preparation method and usage method for ceramization agent
  • Ceramization agent for electrophoretic coating pretreatment, preparation method and usage method for ceramization agent
  • Ceramization agent for electrophoretic coating pretreatment, preparation method and usage method for ceramization agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A vitrifying agent for pretreatment of electrophoretic coating, containing the following raw materials in weight percentage:

[0045]

[0046]

[0047] The rest is deionized water.

[0048] 45% fluorozirconic acid provides both fluoride and zirconium ions; 45% fluorotitanic acid provides both fluoride and titanium ions.

[0049] A preparation method of a vitrifier for electrophoretic coating pretreatment, comprising the following steps:

[0050] 1) Add two-thirds of the formula amount of deionized water into the reaction kettle, then add the formula amount of 45% fluozirconic acid and 45% fluotitanic acid in turn, and stir well until it completely dissolves into a clear solution; then add the formula amount Rare earth promoter cerium nitrate, complexing agent citric acid and oxidant hydrogen peroxide, stirred until clear and transparent;

[0051] 2) Add one-tenth of the formula amount of deionized water to another container, heat to 30-40°C, add the formula amou...

Embodiment 2

[0063] A vitrifying agent for pretreatment of electrophoretic coating, containing the following raw materials in weight percentage:

[0064]

[0065] remaining deionized water.

[0066] The ammonium fluorozirconate provides both fluoride and zirconium ions; sodium fluorotitanate provides both fluoride and titanium ions.

[0067] A preparation method of a vitrifier for electrophoretic coating pretreatment, comprising the following steps:

[0068] 1) Add two-thirds of the formula amount of deionized water into the reaction kettle, then add the formula amount of ammonium fluozirconate and sodium fluotitanate in turn, and stir well until completely dissolved into a clear solution; then add the formula amount of rare earth Accelerator lanthanum nitrate, complexing agent potassium sodium tartrate and oxidant potassium chlorate are stirred until clear and transparent;

[0069] 2) Add one-tenth of the formula amount of deionized water into another container, heat to 30-40°C, add ...

Embodiment 3

[0081] A vitrifying agent for pretreatment of electrophoretic coating, containing the following raw materials in weight percentage:

[0082] Potassium fluozirconate 0.5%

[0083] Sodium fluotitanate 1%

[0084] γ-Aminopropyltriethoxysilane 0.8%

[0085] Chelate solution of bis(dioctyloxypyrophosphate)ethylene titanate and triethanolamine 0.2%

[0086]

[0087] The balance is deionized water.

[0088] Potassium fluozirconate provides both fluoride and zirconium ions; sodium fluotitanate provides both fluoride and titanium ions.

[0089] A preparation method of a vitrifier for electrophoretic coating pretreatment, comprising the following steps:

[0090] 1) Add two-thirds of the formula amount of deionized water into the reaction kettle, then add the formula amount of potassium fluozirconate and sodium fluotitanate in turn, stir well until completely dissolved into a clear solution; then add the formula amount of rare earth Accelerator cerium chloride, complexing agent t...

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Abstract

The invention method provides a ceramization agent for electrophoretic coating pretreatment, a preparation method and a usage method for the ceramization agent. Compared with the prior art, fluorine ions slightly dissolve the surfaces of steel and a zinc substrate first, and meanwhile, the fluorine ions and zirconium / titanium ions form a compact conversion film layer on the dissolved metal surface; and a silane coupling agent and a cross-linking agent in colloid achieve the synergistic effect, and meanwhile, a rare earth promoter in a solution also plays a role. An organic-inorganic hybrid film is formed on the metal surface, and the corrosion resistance of the conversion film as well as the adhesive force of the conversion film and electrophoretic paint are far superior to that of ternary phosphating films and common ceramization films.

Description

technical field [0001] The invention belongs to metal surface treatment technology, and in particular relates to a ceramic agent for electrophoretic coating pretreatment, a preparation method and a use method thereof, which are suitable for the electrophoretic coating pretreatment process of automobiles and auto parts products, so that electrophoretic paint and metal The matrix is ​​tightly bound. Background technique [0002] At present, the application of metal surface treatment agent technology to replace phosphating solution is becoming more and more mature in the home appliance industry, and it is showing a trend of diversification. Among them, zirconium salt or ceramic agent compounded with zirconium salt and silane is dominant. A single zirconium film not only It has poor corrosion resistance, is also brittle, and has poor binding force with electrophoretic organic coatings. [0003] Silane is called industrial monosodium glutamate and is widely used. Silane contain...

Claims

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Application Information

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IPC IPC(8): C23C22/34C23C22/73
CPCC23C22/34C23C22/73C23C2222/20
Inventor 褚云婷
Owner 芜湖市瑞杰环保材料科技有限公司
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