Recipe design for enabling aluminum alloy spraying oil removal groove and chromate-free passivation groove chemical to be compatible

A chromium-free passivation agent and chromium-free passivation technology, applied in the direction of metal material coating process, can solve the problems of the toxic environment of rare earth inorganic salts, which cannot be effectively solved, volatilization pollution, etc., and achieve stable operation and increase stability. , the effect of reducing production costs

Inactive Publication Date: 2019-05-03
熊映明
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Although the rare earth chromium-free passivation technology has made some progress, it has not been able to effectively solve the problems such as the toxicity of rare earth inorganic salts and its impact on the environment.
However, the applicant believes that, compared with the inorganic salt composite conversion film, although the organic passivation film is a directional technology for surface pretreatment in the future, there are still many factors such as cost, solvent volatilization pollution, etc. Constraints, a long way to go

Method used

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  • Recipe design for enabling aluminum alloy spraying oil removal groove and chromate-free passivation groove chemical to be compatible
  • Recipe design for enabling aluminum alloy spraying oil removal groove and chromate-free passivation groove chemical to be compatible
  • Recipe design for enabling aluminum alloy spraying oil removal groove and chromate-free passivation groove chemical to be compatible

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0180] 2# flowing water washing tank, 3# flowing water washing tank, 5# flowing water washing tank, and 6# tank flowing water washing tank are washed with tap water for 60 seconds and dripped for 30 seconds for production.

[0181] The aluminum alloy spraying degreasing tank of the present invention is designed to be compatible with chromium-free passivation tank agents, including 1# degreasing tank and 4# chrome-free passivating tank, and the aluminum alloy enters 4# chrome-free passivation after degreasing in 1# degreasing tank The tank is passivated, the 1# degreasing tank contains a degreasing agent, and the 4# chromium-free passivation tank contains a chromium-free passivating agent. 2# flowing water washing tank and 3# flowing water washing tank are located before 4# chrome-free passivation tank, 5# flowing water washing tank and 6# flowing water washing tank are located after 4# chrome-free passivation tank. The cleaning water in the cleaning tank is tap water.

[0182...

Embodiment 2

[0187] The aluminum alloy spray degreasing tank of the present embodiment is the same as embodiment 1 to the passivation line compatible with the chromium-free passivation tank medicament, and the difference is that the PBTCA concentration of 4# chromium-free passivation tank is increased to 4.5g / L, 4# , 5#, and 6# grooves are clearer, and the national standard inspection of spraying materials is qualified; reduce the PBTCA concentration of 4# chromium-free passivation tank to 2.0g / L, and the national standard inspection of spraying materials is qualified, 4# grooves are clear, and 5#, 6# grooves are slightly Turbid, with a small amount of fluoride separated out. It can not only meet the requirements of the national standard, reduce the cost, but also block the precipitation of fluoride in the 4# chromium-free passivation tank, 5#, and 6# washing tanks. %)): PBTCA (50wt.%)=1:1 (weight ratio, wherein the weight ratio of fluotitanic acid to fluozirconic acid is also 1:1); consid...

Embodiment 3

[0190] The passivation line compatible with the chromium-free passivation tank agent of the aluminum alloy spraying degreasing tank of this embodiment is the same as that of embodiment 1, the difference is that the passivation time of 4# chromium-free passivation tank is increased to 240 seconds, and the national standard test is qualified ;Reduce the passivation time of 4# chrome-free passivation tank to 20 seconds, and the national standard test occasionally fails; the passivation time can be shortened appropriately at room temperature, but not less than 30 seconds; the passivation time can be extended appropriately at low temperature, but not more than 240 seconds.

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Abstract

The invention discloses recipe design for enabling an aluminum alloy spraying oil removal groove and chromate-free passivation groove chemical to be compatible. The recipe design thoroughly solves theproblems that a 1# oil removal groove and a 4# chromate-free passivation groove are not stable, fluorine-containing sludge is generated on the groove bottom easily, and toxic and dangerous waste needs to be cleared manually. Stable ingredients of groove liquid in a traditional oil removal groove and a chromate-free passivation groove are insufficient and are decomposed and deposited easily; and ingredients of oil removing liquid is brought into the 4# chromate-free passivation groove through a 3# water washing groove, and incompatibility is caused. By means of the design for enabling the ingredients of the 1# oil removing groove and the ingredients of the 4# chromate-free passivation groove to be compatible, the oil removing liquid does not consume chromate-free passivation groove chemical and can supplement ingredients, and the production cost is reduced. By means of addition of a corrosion inhibitor, a chelating agent and bonderite, and chelation with positive ions, generation of fluoride and hydroxide is eradicated, it is ensured that the groove liquid is not turbid or deposited, and aluminum alloy powder spraying chromate-free passivation pre-treatment stable production is achieved.

Description

technical field [0001] The invention relates to the technical field of chromium-free passivation pretreatment of aluminum alloy spraying, in particular to the formulation design of an aluminum alloy spraying degreasing tank compatible with chromium-free passivation tank chemicals. Background technique [0002] For a long time, people have realized that the chromium-containing passivation technology has serious chromium pollution in the whole process of aluminum profile production, use and disposal. It is the goal of the aluminum profile manufacturing industry to achieve chromium-free passivation treatment on the surface of aluminum profiles. In order to meet the needs of the industry for chromium-free passivation technology, researchers have carried out a lot of research work. In the past 30 years of research on the technology of chromium-free passivation on the surface of aluminum and its alloys, a variety of aluminum and aluminum alloys have been produced. The research res...

Claims

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Application Information

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IPC IPC(8): C23G1/12C23C22/34C23C22/78
Inventor 熊映明
Owner 熊映明
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