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Passivating solution for plated metal

A passivation solution and post-passivation technology, applied in the direction of metal material coating process, etc., can solve the problems of different directions and failure to provide, and achieve low cost, environmental protection, high temperature resistance and enhanced fingerprint resistance. Effect

Active Publication Date: 2012-01-11
CHANGSHU FENGFAN POWER EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the research on the replacement of chromate passivation has different directions and many schemes, but it has not yet provided a product that can provide high corrosion resistance, fingerprint resistance and high temperature resistance.

Method used

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  • Passivating solution for plated metal
  • Passivating solution for plated metal
  • Passivating solution for plated metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Use deionized water to prepare passivation with ammonium vanadate concentration of 0.01g / L, ammonium molybdate concentration of 5g / L, 3-aminopropyltriethoxysilane concentration of 15g / L, and phytic acid concentration of 60g / L Liquid, adjust its pH to 3 to obtain passivation liquid 1.

Embodiment 2

[0057] Use deionized water to prepare a passivated with a vanadium sodium salt concentration of 0.5g / L, ammonium molybdate concentration of 5g / L, butyl-aminopropyltriethoxysilane concentration of 9g / L, and phytic acid concentration of 30g / L. And adjust the pH to 6 to obtain passivation solution 2.

Embodiment 3

[0059] Prepared with deionized water, the concentration of ammonium vanadate is 5g / L, the concentration of sodium molybdate is 8g / L, the concentration of 3-glycidyl ether propyltrimethoxysilane is 2g / L, and the concentration of epoxy water-based resin is 50g / L. The passivation solution has a pH of 6, and the passivation solution 3 is obtained.

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PUM

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Abstract

The invention relates to a chromium-free passivating solution for plated metal and a plating method thereof. The passivating solution comprises 0.001 to 30 g / L of vanadate and 0.01 to 30 g / L of molybdate, and can further comprise an aqueous solution of one or more selected from the group consisting of 1 to 300 g / L of phytic acid, 0.01 to 30 g / L of silane and 1 to 500 g / L of a resin. The passivating solution can be used for plated metal through immersion, spraying, roller coating or brush painting and forms a replacing layer and / or a covering layer on the surface of treated metal, which enables surface anti-corrosion performance of treated metal to be effectively enhanced; in addition, the passivating solution provided in the invention does not contain environment-polluting chromium of any valence state, which is beneficial for environmental protection.

Description

Technical field [0001] The present invention relates to a protective liquid after plating on a metal surface and a method of use thereof. More specifically, the present invention relates to a passivation liquid after plating of a metal without chromium and a method of use thereof. Background technique [0002] After the metal is plated (the current surface treatment includes electroplating, hot-dip plating, etc.), it is exposed to the air during storage and transportation or during use. Due to the change of air humidity and temperature, condensation will form on the surface of the coating, causing the metal to rust Or discoloration affects the rust-proof performance of the product surface. In order to prevent such rusting of the coating, after coating the metal surface, the surface coating needs to be passivated. [0003] The traditional passivation treatment usually uses hexavalent or trivalent chromate to form a passivation film on the surface of the coating. The film has good is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/40
Inventor 尤为
Owner CHANGSHU FENGFAN POWER EQUIP
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