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Preparation method of chromium-free passivation liquid

A chromium-free passivation and silicon oxide technology, applied in the coating process of metal materials, etc., can solve the problems of poor corrosion resistance of the protective film, and achieve the effect of excellent storage resistance and excellent corrosion resistance

Inactive Publication Date: 2019-01-04
镇江瑞德新材料科技研发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the invention is to overcome the poor corrosion resistance defect of the protective film formed by the existing chromium-free passivation solution, and provide a chromium-free passivation solution capable of forming a better protective film with corrosion resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0011] 1. Mix 30 parts by weight of water and 2 parts by weight of silane coupling agent CH 2 =C(CH 3 )COO(CH 2 ) 3 Si(OCH 3 ) 3 , and mix until uniform at a stirring speed of 1800 rpm to obtain uniform liquid A.

[0012] All of the homogeneous liquid A and 1 part by weight of the water-soluble silicate pentahydrate sodium metasilicate were mixed until uniform at a stirring speed of 1800 rpm to obtain a homogeneous liquid B.

[0013] All of the homogeneous liquid B and 1 part by weight of the accelerator thiourea were mixed until uniform at a stirring speed of 1800 rpm to obtain a homogeneous liquid C.

[0014] All of the homogeneous liquid C and 2.5 parts by weight of silica filler were mixed until uniform at a stirring speed of 1800 rpm to obtain a homogeneous liquid D.

[0015] All of the homogeneous liquid D and 1 part by weight of the water-soluble film-forming resin in terms of solids were mixed until uniform at a stirring speed of 1800 rpm to obtain a homogeneous ...

example 2

[0017] 25 parts by weight of water and 1.5 parts by weight of silane coupling agent CH 2 =C(CH 3 )COO(CH 2 ) 3 Si(OCH 3 ) 3 , and mix until uniform at a stirring speed of 1800 rpm to obtain uniform liquid A.

[0018] All of the homogeneous liquid A and 1 part by weight of the water-soluble silicate potassium silicate were mixed until uniform at a stirring speed of 1800 rpm to obtain a homogeneous liquid B.

[0019] All of the homogeneous liquid B and 0.5 parts by weight of an equal weight mixture of accelerators thiourea and urea were mixed until uniform at a stirring speed of 1800 rpm to obtain a homogeneous liquid C.

[0020] All of the homogeneous liquid C and 1.8 parts by weight of silica filler nano-silica sol were mixed at a stirring speed of 1800 rpm to obtain a homogeneous liquid D.

[0021] All of the homogeneous liquid D and 1 part by weight of the water-soluble film-forming resin in terms of solids were mixed until uniform at a stirring speed of 1800 rpm to ob...

example 3

[0023] 90 parts by weight of water and 5 parts by weight of silane coupling agent CH 2 =C(CH 3 )COO(CH 2 ) 3 Si(OCH 3 ) 3 , and mix until uniform at a stirring speed of 1800 rpm to obtain uniform liquid A.

[0024] All of the homogeneous liquid A and 1 part by weight of the water-soluble silicate potassium silicate were mixed until uniform at a stirring speed of 1800 rpm to obtain a homogeneous liquid B.

[0025] All of the homogeneous liquid B and 1.8 parts by weight of an equal weight mixture of accelerators thiourea and urea were mixed until uniform at a stirring speed of 1800 rpm to obtain a homogeneous liquid C.

[0026] All of the homogeneous liquid C and 2.5 parts by weight of silica filler nano-silica sol were mixed at a stirring speed of 1800 rpm to obtain a homogeneous liquid D.

[0027] All of the homogeneous liquid D and 5 parts by weight of the water-soluble film-forming resin in terms of solids were mixed until uniform at a stirring speed of 1800 rpm to obt...

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Abstract

The invention provides a preparation method of chromium-free passivation liquid. Specifically, water, a silane coupling agent, water-soluble silicate, a promoter, silicon oxide filler and water-soluble film-forming resin are sequentially mixed evenly. Protection film formed by the chromium-free passivation liquid is excellent in corrosion resistance. In addition, the chromium-free passivation liquid is very excellent in storage endurance, and can be stored at the room temperature for multiple days without obvious property change or performance degradation after being prepared.

Description

technical field [0001] The invention relates to the field of metal protection, in particular to a preparation method of a chromium-free passivation solution, a chromium-free passivation solution obtained by the preparation method, and applications of the chromium-free passivation solution. Background technique [0002] Metal materials include hot-dip galvanized metal materials and hot-dip galvanized metal materials. In order to prevent corrosion, a layer of chromium-free passivation solution is applied on the surface of the metal materials to form a protective film. Therefore, the performance of chromium-free passivation solution is very important for the anti-corrosion of metal materials. [0003] For example, CN101608306A discloses a passivation solution, which is characterized in that: the passivation solution is an aqueous solution containing a water-soluble molybdenum compound, boric acid, water-soluble organic matter and silica sol, wherein the water-soluble organic ma...

Claims

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Application Information

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IPC IPC(8): C23C22/05
CPCC23C22/05C23C2222/20
Inventor 潘亚军
Owner 镇江瑞德新材料科技研发有限公司
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