Reverse tandem water-saving device for aluminium alloy spraying pre-treatment chromium-free passivating line cleaning water

A chrome-free passivation, reverse series technology, applied in the direction of metal material coating process, etc., can solve the problem that the influence of rare earth inorganic salt toxicity environment can not be effectively solved, volatilization pollution and other problems, to increase stability, slow down corrosion, reduce The effect of production and environmental costs

Active Publication Date: 2019-03-22
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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  • Reverse tandem water-saving device for aluminium alloy spraying pre-treatment chromium-free passivating line cleaning water
  • Reverse tandem water-saving device for aluminium alloy spraying pre-treatment chromium-free passivating line cleaning water
  • Reverse tandem water-saving device for aluminium alloy spraying pre-treatment chromium-free passivating line cleaning water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0185] The 2# flowing washing tank, the 3# flowing washing tank, the 5# flowing washing tank and the 6# flowing washing tank are washed with tap water for 60 seconds and dripped for 30 seconds for production.

[0186] The aluminum alloy spraying pretreatment chrome-free passivation line cleaning water of the present invention is configured in reverse series to save water, including 1# degreasing tank, 2# flowing water washing tank, 3# flowing water washing tank, 4# chrome-free passivation tank, 5# Flowing washing tank and 6# flowing washing tank, the aluminum alloy passes through 1# degreasing tank, 2# flowing washing tank, 3# flowing washing tank, 4# chrome-free passivation tank, 5# flowing washing tank and 6# flowing washing tank ; 2# flowing washing tank, 3# flowing washing tank, 5# flowing washing tank and 6# flowing washing tank are reversely connected in series. The 1# degreasing tank contains a degreasing agent, and the 4# chromium-free passivation tank contains a chrom...

Embodiment 2

[0193] The passivation line of the aluminum alloy spraying pretreatment chromium-free passivation line of this embodiment is the same as that of embodiment 1, the difference is that the PBTCA concentration of the 4# chromium-free passivation tank is increased to 4.5g / L, 4# flowing water washing tank, 5# flowing water washing tank, 6# flowing water washing tank 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# chromium-free passivation tank is clear, 5# flowing water washing tank, 6# flowing water washing tank is slightly turbid, and a small amount of fluoride is decomposed and released. It can not only meet the requirements of the national standard, reduce the cost, but also block the precipitation of fluoride in the 4# chrome-free passivation tank, 5# flowing water washing tank and 6# fl...

Embodiment 3

[0196] The passivation line of the aluminum alloy spraying pretreatment chromium-free passivation line 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, the national standard test is qualified; reduce the passivation time of 4# chromium-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 time, but do not exceed 240 seconds.

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Abstract

The invention discloses a reverse tandem water-saving device for aluminium alloy spraying pre-treatment chromium-free passivating line cleaning water. A 6# slot, a 5# slot, a 3# slot and a 2# slot arein reverse tandem connection; cleaning water is in reverse tandem flow through the 6# slot, the 5# slot, the 3# slot and the 2# slot; an oil remover is contained in a 1# oil removal slot; the oil remover is prepared from the following chemical components: fluotitanic acid, fluozirconic acid and phosphonobutane tricarboxylic acid; and a chromium-free passivating agent is contained in a 4# chromium-free passivating slot, and the chromium-free passivating agent is prepared from the following chemical components: fluotitanic acid, fluozirconic acid and phosphonobutane tricarboxylic acid. All metal cations are chelated by utilizing the unique design which is compatible with a medicament in the 4# chromium-free passivating slot, and chemical properties with ultra-strong chelating ability on PBTCA, so that the 1# slot to 6# slot are kept to be not muddy and free of precipitates; and two sets of cleaning water are in reverse tandem connection, so that one half of cleaning water is reduced, treatment amount of fluorine-containing wastewater is greatly reduced, conventional pure water cleaning is abandoned, and production and environment-friendly cost is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of chromium-free passivation pretreatment of aluminum alloy spraying, in particular to a reverse series water-saving configuration of cleaning water for a chromium-free passivation line of aluminum alloy spraying pretreatment. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/34C23C22/73
CPCC23C22/34C23C22/73
Inventor 熊映明
Owner 熊映明
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