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Aluminum alloy vanadium-titanium-europium passivation solution and preparation method and using method thereof

A technology of aluminum alloy and passivation solution, which is applied in the coating process of metal materials, can solve the problems of high operating temperature, long passivation time, and short salt spray resistance time of the passivation film, and achieve good corrosion resistance and passivation. Short melting time and excellent salt spray resistance

Inactive Publication Date: 2021-08-10
齐齐哈尔北方集团北方化学工业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention provides an aluminum alloy vanadium titanium europium passivation solution, which solves the problems of high operating temperature, long passivation time and short salt spray resistance time of the passivation film in the existing passivation solution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] Water-based epoxy ester resin dispersion 8%, cobalt sulfate monohydrate 4%, sodium fluoride 3%, sodium molybdate 6%, sulfuric acid 5%, citric acid 2%, sodium fluotitanate 1%, europium chloride hexahydrate matter (EuCl 3 ·6H 2 O) 5%, vanadium pentoxide (V2 o 5 ) 5%, organic bentonite 0.15%, and the balance is water.

[0074] The passivation solution in this example is operated at 40-45° C., the passivation time is 50 seconds, and the salt spray resistance of the obtained passivation film reaches 500 hours.

Embodiment 2

[0076] Water-based epoxy ester resin dispersion 10%, cobalt sulfate monohydrate 2%, sodium fluoride 6%, sodium molybdate 4%, sulfuric acid 5%, citric acid 3%, sodium fluotitanate 3%, europium chloride hexahydrate matter (EuCl 3 ·6H 2 O) 6%, vanadium pentoxide (V 2 o 5 ) 6%, organic bentonite 0.2%, and the balance is water.

[0077] The passivation solution in this example is operated at 40-45° C., the passivation time is 40 seconds, and the salt spray resistance of the obtained passivation film reaches 600 hours.

Embodiment 3

[0079] Water-based epoxy ester resin dispersion 12%, cobalt sulfate monohydrate 3%, sodium fluoride 4%, sodium molybdate 5%, sulfuric acid 4%, citric acid 3%, sodium fluotitanate 3%, europium chloride hexahydrate matter (EuCl 3 ·6H 2 O) 9%, vanadium pentoxide (V 2 o 5 ) 8%, organic bentonite 0.2%, and the balance is water.

[0080] The passivation solution in this example is operated at 40-45° C., the passivation time is 30 seconds, and the salt spray resistance of the obtained passivation film reaches 720 hours.

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Abstract

The invention discloses an aluminum alloy vanadium-titanium-europium passivation solution and a preparation method and a using method thereof. The passivation solution comprises a film-forming carrier, a film-forming accelerant and an anti-corrosion reinforcing agent; the film forming carrier is used for forming a passivation film; the film forming accelerant is used for providing a titanium element and a vanadium element in the passivation film; the titanium element and the vanadium element are used for reducing the operation temperature and passivation time for forming the passivation film and adjusting the layer color of the passivation film; the anti-corrosion reinforcing agent is used for providing an europium element in the passivation film; and the europium element is used for prolonging the salt spray resistance time of the passivation film. The problems that an existing passivation solution is high in operation temperature and long in passivation time, and a passivation film is short in salt spray resistance time are solved.

Description

technical field [0001] The invention relates to the field of metal surface treatment agents, in particular to a passivation solution used in an aluminum alloy passivation process. Background technique [0002] Passivation solution is a solution that can make the metal surface passive. It is generally used for post-plating treatment of galvanized, cadmium and other coatings. The purpose is to form a surface layer on the surface of the coating that can prevent the normal reaction of the metal and improve its corrosion resistance. Sex, and increase product beauty. Widely used in shipbuilding industry, machinery industry, aviation, construction and many other fields. [0003] The passivation solution used in the aluminum alloy passivation process in my country is still mainly chromate passivation. The passivation solution has a high operating temperature of 80-90 ° C, a long passivation time of 10-20 minutes, and a passivation film. Salt spray resistance only reaches 200 hours ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/44
CPCC23C22/44
Inventor 梁胜伟宋海东袁弥强
Owner 齐齐哈尔北方集团北方化学工业有限责任公司
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