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Antimonate chemical conversion treatment solution for improving corrosion resistance of magnesium alloy

An antimonate chemical and conversion treatment technology, which is applied in the coating process of metal materials, etc., can solve the problems of general self-healing performance, fast solution consumption, instability, etc., and achieves expanded application range, uniform and flat conversion film, and simple composition Effect

Active Publication Date: 2021-12-31
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some of the above systems have problems such as fast solution consumption, instability, and general self-healing performance.

Method used

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  • Antimonate chemical conversion treatment solution for improving corrosion resistance of magnesium alloy
  • Antimonate chemical conversion treatment solution for improving corrosion resistance of magnesium alloy
  • Antimonate chemical conversion treatment solution for improving corrosion resistance of magnesium alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] A kind of antimonate chemical conversion treatment solution for improving the corrosion resistance of magnesium alloy, including solvent and solute, solvent is water, solute includes antimonate and co-solvent, antimonate is potassium hexahydroxy antimonate, co-solvent It is triethanolamine, the concentration of potassium hexahydroxyantimonate is 0.3mol / L, and the concentration of triethanolamine is 0.5mol / L.

[0078] A method for using the above-mentioned antimonate chemical conversion treatment solution in preparing a magnesium alloy chemical conversion film, specifically comprising the following steps:

[0079] 1. Pretreatment: Cut out a sample with a size of 40mm×10mm×1mm from the AZ31B magnesium alloy plate. Use 200#, 400#, 800#, 1500# silicon carbide water abrasive paper successively to polish the surface evenly.

[0080] 2. The solution used and operating conditions: the aqueous solution is prepared with deionized water, and the composition and content are as fol...

Embodiment 2

[0091] A kind of antimonate chemical conversion treatment solution for improving the corrosion resistance of magnesium alloy, including solvent and solute, solvent is water, solute includes antimonate and co-solvent, antimonate is potassium hexahydroxy antimonate, co-solvent It is glycerol, the concentration of potassium hexahydroxyantimonate is 0.25mol / L, and the concentration of glycerol is 0.5mol / L.

[0092] A method for using the above-mentioned antimonate chemical conversion treatment solution in preparing a magnesium alloy chemical conversion film, specifically comprising the following steps:

[0093] 1. Pretreatment: Cut out a sample with a size of 40mm×10mm×1mm from the AZ31B magnesium alloy plate. Use 200#, 400#, 800#, 1500# silicon carbide water abrasive paper successively to polish the surface evenly.

[0094] 2. The solution used and operating conditions: the aqueous solution is prepared with deionized water, and the composition and content are as follows.

[009...

Embodiment 3

[0105] A kind of antimonate chemical conversion treatment solution for improving the corrosion resistance of magnesium alloy, including solvent and solute, solvent is water, solute includes antimonate and co-solvent, antimonate is potassium hexahydroxy antimonate, co-solvent It is sorbitol, the concentration of potassium hexahydroxyantimonate is 0.5mol / L, and the concentration of sorbitol is 1mol / L.

[0106] A method for using the above-mentioned antimonate chemical conversion treatment solution in preparing a magnesium alloy chemical conversion film, specifically comprising the following steps:

[0107] 1. Pretreatment of the sample: cut out a sample with a size of 40mm×10mm×1mm from the AZ31B magnesium alloy plate. Use 200#, 400#, 800#, 1500# silicon carbide water abrasive paper successively to polish the surface evenly.

[0108] 2. The solution used and operating conditions: the aqueous solution is prepared with deionized water, and the composition and content are as follo...

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Abstract

The invention relates to an antimonate chemical conversion treatment solution for improving corrosion resistance of a magnesium alloy and an application method. The chemical conversion treatment solution is used for preparing a magnesium alloy chemical conversion film, the chemical conversion treatment solution comprises a solvent and a solute, the solute comprises antimonate and a cosolvent, and the molecules of the cosolvent contain three or more hydroxyl groups and / or carbonyl groups. The application method specifically comprises the following steps of (a) conducting degreasing, specifically, conducting degreasing treatment on the magnesium alloy through degreasing fluid, and then taking out and cleaning; (b) conducting pickling, specifically, conducting rust removal treatment on the magnesium alloy obtained in the step (a) by adopting a pickling solution, and then taking out and cleaning; and (c) conducting conversion treatment, specifically, soaking the magnesium alloy obtained in the step (b) in the chemical conversion treatment solution for conversion treatment, and then taking out, cleaning and drying. Compared with the prior art, the chemical conversion treatment solution disclosed by the invention is relatively simple in composition, small in corrosivity and capable of being used in a relatively wide temperature range, and an obtained conversion film is uniform and flat and has few cracks.

Description

technical field [0001] The invention relates to the technical field of surface coating preparation and corrosion protection of metal materials, in particular to an antimonate chemical conversion treatment solution for improving the corrosion resistance of magnesium alloys and the antimonate chemical conversion treatment solution in the preparation of magnesium alloy chemical conversion How to use the membrane. Background technique [0002] Chemical conversion coating is one of the important means of light alloy protection. Chemical conversion coating is a fast and economical treatment technology, which can not only effectively improve the corrosion resistance of the alloy, but also serve as the substrate for subsequent coating treatment of the alloy. [0003] Magnesium alloys have low density and high specific strength, and are more and more widely used in vehicles to achieve lightweight, energy saving and emission reduction. However, the high chemical activity of magnesiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/60C23C22/68
CPCC23C22/60C23C22/68
Inventor 古立建程呵呵朱天佑罗子俊陆科睿杨鑫宋仁宏陈爱英
Owner UNIV OF SHANGHAI FOR SCI & TECH
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