Chromate-free passivation solution for stainless steel

A chrome-free passivation, stainless steel technology, applied in the field of passivation solution, can solve the problems affecting human health, chromate is highly toxic, waste water pollutes the environment, etc., to enhance self-healing and corrosion resistance, use value High and enhanced corrosion inhibition effect

Active Publication Date: 2017-05-31
ANHUI BAOHENG ADVANCED MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, chromate is highly toxic and carcinogenic. The aerosol generated during the passivation process is harmful to the health of workers. Regular use of chromium passivation products will seriously affect human health. The waste wa...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A chromium-free passivation solution for stainless steel, made of the following materials in parts by weight:

[0019] 13 parts of molybdate, 6 parts of tungstate, 3 parts of tannic acid, 4 parts of phytic acid, 1 part of silane coupling agent, 2 parts of rare earth sulfate, 0.5 parts of nano-modified filler, 3 parts of additives, 1000 parts Water; the auxiliary agent is made up of the following parts by weight: 15 parts of fatty alcohol polyoxyethylene ether, 6 parts of polyethylene glycol octylphenyl ether, 3 parts of methacrylic resin, 2 parts of epoxy resin, 2 parts Mercaptobenzothiazole, 1 part of sodium lignin sulfonate; the nano-modified filler is made of the following parts by weight: 4 parts of nano silicon dioxide, 1 part of nano titanium carbide.

[0020] Further, the silane coupling agent is silane coupling agent kh550.

[0021] Further, the preparation method of the nano-modified filler comprises the following steps:

[0022] (1) Mix nano-silica and nano-...

Embodiment 2

[0029] A chromium-free passivation solution for stainless steel, made of the following materials in parts by weight:

[0030] 15 parts of molybdate, 8 parts of tungstate, 4 parts of tannic acid, 5 parts of phytic acid, 2 parts of silane coupling agent, 3 parts of rare earth sulfate, 0.8 parts of nano-modified filler, 4 parts of additives, 1100 parts Water; the auxiliary agent is made up of the following parts by weight: 18 parts of fatty alcohol polyoxyethylene ether, 9 parts of polyethylene glycol octylphenyl ether, 4 parts of methacrylic resin, 3 parts of epoxy resin, 4 parts mercaptobenzothiazole, 2 parts of sodium lignosulfonate; the nano-modified filler is made of the following parts by weight: 5 parts of nano-silicon dioxide, 1.5 parts of nano-titanium carbide. All the other method steps are the same as in Example 1.

Embodiment 3

[0032] A chromium-free passivation solution for stainless steel, made of the following materials in parts by weight:

[0033] 16 parts of molybdate, 9 parts of tungstate, 5 parts of tannic acid, 6 parts of phytic acid, 3 parts of silane coupling agent, 4 parts of rare earth sulfate, 1 part of nano-modified filler, 5 parts of additives, 1200 parts Water; the auxiliary agent is made up of the following parts by weight: 20 parts of fatty alcohol polyoxyethylene ether, 10 parts of polyethylene glycol octylphenyl ether, 5 parts of methacrylic resin, 4 parts of epoxy resin, 5 parts mercaptobenzothiazole, 4 parts of sodium lignosulfonate; the nano-modified filler is made of the following parts by weight: 6 parts of nano silicon dioxide, 2 parts of nano titanium carbide. All the other method steps are the same as in Example 1.

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PUM

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Abstract

The invention discloses a chromate-free passivation solution for stainless steel, and relates to a passivation solution. The chromate-free passivation solution for the stainless steel is specifically prepared from molybdate, tungstate, gallotannic acid, phytic acid, a silane coupling agent, a rare-earth sulfate, nano-modified packing, auxiliaries and water. The prepared passivation solution has the characteristics of being environmentally friendly, free of strong pungent odor and nontoxic, harm to personnel and the environment can be obviously reduced, the production cost is effectively reduced, and compared with similar products, the passivation speed of the chromate-free passivation solution is increased by about 35%; and the stainless steel treated with the chromate-free passivation solution is more excellent in corrosion resistance and high in use value.

Description

technical field [0001] The invention relates to a passivation solution, in particular to a chromium-free passivation solution for stainless steel. Background technique [0002] During the processing of stainless steel, it will cause surface defects, hidden dangers of corrosion, black scale and other metal compounds, yellow welds and grease during cold drawing, etc. In order to improve the appearance and corrosion resistance of stainless steel, the processed stainless steel must be acidified Wash passivation treatment. For a long time, people have mainly adopted chromate passivation method for the surface passivation treatment of stainless steel. The chromate passivation film formed on the metal surface has a good anti-corrosion effect on the base metal. The passivation process is mature and the cost is low. be widely used. However, chromate is highly toxic and carcinogenic. The aerosol generated during the passivation process is harmful to the health of workers. Regular us...

Claims

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Application Information

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IPC IPC(8): C23C22/40
CPCC23C22/40
Inventor 洪功正潘永刚蔡永波
Owner ANHUI BAOHENG ADVANCED MATERIAL TECH CO LTD
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