Colored chromium-free passivation solution

A chrome-free passivation and color technology, applied in the direction of metal material coating process, can solve the problems of affecting the long-term corrosion resistance of metals, difficult to obtain coating, etc., and achieve the effect of good passivation performance

Active Publication Date: 2017-10-10
上海釜强智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, in order to improve the corrosion resistance of the alloy and show the thickness of the film, organic substances are introduced into the chromium-free passivation solution to form a colorful f

Method used

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  • Colored chromium-free passivation solution

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The colored chrome-free passivation solution consists of 3 parts by weight of fluorozirconic acid solution, 4 parts by weight of fluorotitanic acid, 2 parts by weight of ammonium metavanadate, 1 part by weight of tannic acid, 0.1 parts by weight of silica sol solution and 0.05 parts by weight The dispersant of parts by weight, the catechin gallate of 0.1 parts by weight, the nanometer tantalum oxide solution of 0.1 parts by weight and the water of 100 parts by weight, described fluozirconic acid solution is the aqueous solution containing 50%wt fluozirconic acid, the The fluorotitanic acid solution is an aqueous solution containing 50%wt fluorotitanic acid, the silica sol solution is an aqueous solution containing 30%wt silicon dioxide, and the nano-tantalum oxide solution is an aqueous solution containing 15%wt nano-tantalum oxide.

[0052] The nanometer tantalum oxide solution is prepared through the following steps:

[0053] 8 parts by weight of tantalum pentachlorid...

Embodiment 2

[0060] The colored chrome-free passivation solution consists of 3 parts by weight of fluorozirconic acid solution, 4 parts by weight of fluorotitanic acid, 2 parts by weight of ammonium metavanadate, 1.2 parts by weight of tannic acid, 0.13 parts by weight of silica sol solution and 0.05 parts by weight The dispersant of parts by weight, the catechin gallate of 0.08 parts by weight, the nanometer tantalum oxide solution of 0.08 parts by weight and the water of 100 parts by weight, described fluozirconic acid solution is the aqueous solution containing 50%wt fluozirconic acid, the The fluorotitanic acid solution is an aqueous solution containing 50%wt fluorotitanic acid, the silica sol solution is an aqueous solution containing 30%wt silicon dioxide, and the nano-tantalum oxide solution is an aqueous solution containing 15%wt nano-tantalum oxide.

[0061] The nanometer tantalum oxide solution is prepared through the following steps:

[0062] 8 parts by weight of tantalum pentac...

Embodiment 3

[0069] The colored chrome-free passivation solution consists of 3 parts by weight of fluorozirconic acid solution, 4 parts by weight of fluorotitanic acid, 2 parts by weight of ammonium metavanadate, 0.8 parts by weight of tannic acid, 0.07 parts by weight of silica sol solution and 0.05 parts by weight The dispersant of parts by weight, the catechin gallate of 0.12 parts by weight, the nanometer tantalum oxide solution of 0.12 parts by weight and the water of 100 parts by weight, described fluozirconic acid solution is the aqueous solution containing 50%wt fluozirconic acid, the The fluorotitanic acid solution is an aqueous solution containing 50%wt fluorotitanic acid, the silica sol solution is an aqueous solution containing 30%wt silicon dioxide, and the nano-tantalum oxide solution is an aqueous solution containing 15%wt nano-tantalum oxide.

[0070] The nanometer tantalum oxide solution is prepared through the following steps:

[0071] 8 parts by weight of tantalum pentac...

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Abstract

The invention relates to a colored chromium-free passivation solution. The colored chromium-free passivation solution is an aqueous solution, and is prepared from, by weight, 1-5 parts of a hexafluorozirconic acid solution, 2-8 parts of hexafluorotitanic acid, 1-3 parts of ammonium metavanadate, 0.1-2 parts of tannic acid and 80-100 parts of water; the hexafluorozirconic acid solution is an aqueous solution containing 30-60wt% of hexafluorozirconic acid; and the hexafluorotitanic acid solution is an aqueous solution containing 30-60wt% of hexafluorotitanic acid. The prepared colored chromium-free passivation solution has very good passivation performance.

Description

technical field [0001] The invention relates to a colored chrome-free passivation solution. Background technique [0002] Metals in the atmosphere will react chemically or electrochemically with oxygen, water and other impurities under certain conditions to cause metal corrosion. Metal corrosion not only damages the metal material itself in terms of its shape, color and mechanical properties, but more importantly, it reduces the quality level of its products, and damages its precision and sensitivity. Although stains from corrosion of metal surfaces can be removed from the metal substrate, these methods are often time consuming and also reduce the strength of the metal. In addition, when the metal surface is coated with polymer coatings, adhesives or rubber preservatives, the corrosion of the metal surface will cause the loss or weakening of the adhesion between the preservative coating and the metal surface, which cannot play a good role in anti-corrosion. Effect. Theref...

Claims

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Application Information

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IPC IPC(8): C23C22/44
CPCC23C22/44
Inventor 傅利平焦艳超
Owner 上海釜强智能科技有限公司
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