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Passivating solution for plated metal

A passivation solution and post-passivation technology, which is applied in the direction of metal material coating technology, can solve the problems of failure to provide, different directions, etc., and achieve the effects of environmental protection, low cost, and wide application prospects

Active Publication Date: 2014-04-16
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 the 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 solution, adjust its pH value to 3 to obtain passivation solution 1.

Embodiment 2

[0057]With deionized water preparation vanadium sodium salt concentration is 0.5g / L, ammonium molybdate concentration is 5g / L, butyl-aminopropyltriethoxysilane concentration is 9g / L, phytic acid concentration is the blunt solution of 30g / L. The passivation solution was adjusted to a pH of 6 to obtain passivation solution 2.

Embodiment 3

[0059] Use deionized water to prepare ammonium vanadate concentration of 5g / L, sodium molybdate concentration of 8g / L, 3-glycidyl ether propyl trimethoxysilane concentration of 2g / L, epoxy water-based resin concentration of 50g / L passivation solution, its pH value is 6, and 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 invention relates to a protective solution after plating on metal surfaces and a method for using the same. More specifically, the invention relates to a passivation solution for metal plating without chromium and a method for using the same. Background technique [0002] After metal plating (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 changes in air humidity and temperature, condensation will form on the surface of the coating, causing metal rust Or discoloration will affect the anti-rust performance of the product appearance. In order to prevent this kind of corrosion of the coating, after the metal surface is coated, 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. This film has good isol...

Claims

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Application Information

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