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Chromium-free passivation solution and preparation method and use thereof, and metal material

A chromium-free passivation, metal material technology, applied in the preparation of chromium-free passivation solution, metal materials, chromium-free passivation solution field, can solve the problem of poor corrosion resistance of protective film, achieve excellent storage resistance, corrosion resistance excellent effect

Inactive Publication Date: 2014-09-24
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose 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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  • Chromium-free passivation solution and preparation method and use thereof, and metal material

Examples

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preparation example Construction

[0013] The invention provides a method for preparing a chromium-free passivation solution, which method comprises mixing water, a silane coupling agent, a water-soluble silicate, an accelerator, a silicon oxide filler and a water-soluble film-forming resin in sequence; The silane coupling agent is CH 2 =C(CH 3 )COO(CH 2 ) 3 Si(OCH 3 ) 3 、CH 2 =C(CH 3 )COO(CH 2 ) 3 Si(OC 2 h 5 ) 3 、CH 2 =C(CH 3 )COO(CH 2 ) 3 SiCH 3 (OCH 3 ) 2 and CH 2 =C(CH 3 )COO(CH 2 ) 3 SiCH 3 (OC 2 h 5 ) 2 At least one of them; the accelerator is thiourea and / or urea.

[0014] Wherein, in detail, the method includes: (1) uniformly mixing water and the silane coupling agent to obtain a uniform liquid A; (2) uniformly mixing the uniform liquid A and a water-soluble silicate to obtain a uniform liquid B; (3) uniformly mix the uniform liquid B and accelerator to obtain uniform liquid C; (4) uniformly mix the uniform liquid C and silicon oxide filler to obtain uniform liquid D; (5) uni...

Embodiment 1

[0051] 28 parts by weight of water and 1.6 parts by weight of silane coupling agent (CH 2 =C(CH 3 )COO(CH 2 ) 3 Si(OCH 3 ) 3, purchased from Hubei Debang Chemical New Material Co., Ltd., brand DB-570) and mixed until uniform at a stirring speed of 1500 rpm to obtain a uniform liquid A.

[0052] Mix all the uniform liquid A and 1 part by weight of water-soluble silicate (sodium metasilicate pentahydrate, purchased from Qingdao Darun Chemical Co., Ltd.) at a stirring speed of 1500 rpm until uniform to obtain uniform liquid B .

[0053] All of the homogeneous liquid B and 0.6 parts by weight of accelerator (thiourea) were mixed until uniform at a stirring speed of 1500 rpm to obtain a homogeneous liquid C.

[0054] All the homogeneous liquid C and 0.72 parts by weight of silica filler (nano silica sol, purchased from Shandong Baite New Material Co., Ltd., the brand is SS-30, and the weight is calculated as silica) at 1500 rpm Mix until homogeneous at stirring speed to obta...

Embodiment 2

[0063] 25 parts by weight of water and 1.4 parts by weight of silane coupling agent (CH 2 =C(CH 3 )COO(CH 2 ) 3 Si(OCH 3 ) 3 , purchased from Hubei Debang Chemical New Material Co., Ltd., brand DB-570) and mixed until uniform at a stirring speed of 1500 rpm to obtain a uniform liquid A.

[0064] All of the uniform liquid A and 1 part by weight of water-soluble silicate (potassium silicate, purchased from Baoding Runfeng Industrial Co., Ltd.) were mixed until uniform at a stirring speed of 1500 rpm to obtain a uniform liquid B.

[0065] All of the homogeneous liquid B and 0.5 parts by weight of accelerator (an equal weight mixture of thiourea and urea) were mixed until uniform at a stirring speed of 1500 rpm to obtain a homogeneous liquid C.

[0066] Mix all the homogeneous liquid C and 0.6 parts by weight of silica filler (nano silica sol, purchased from ADEKA Co., Ltd., the brand is AT-30, and the weight is calculated as silica) at a stirring speed of 1500 rpm until uni...

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Abstract

The invention provides a preparation method of a chromium-free passivation solution. The method comprises successively mixing evenly water, silane coupling agents, water-soluble silicate, an accelerant, a silica filler and water-soluble film-forming resin. The invention also provides the chromium-free passivation solution prepared according to the preparation method and a use thereof in preparation of metal materials. The invention further provides a metal material which comprises a metal substrate and a coating layer adhering onto the metal substrate, wherein the coating layer is a cured product of the chromium-free passivation solution. A protective film formed by the chromium-free passivation solution provided by the invention is quite excellent in corrosion resistance. In addition, the chromium-free passivation solution provided by the invention is quite excellent in storage resistance, and can be stored for 180 days at room temperature after completion of preparation but does not generate obvious character changes and performance reduction.

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, applications of the chromium-free passivation solution and metal materials. Background technique [0002] Metal materials, including hot-dip galvanized metal materials and hot-dip galvanized metal materials, in order to prevent corrosion, a layer of chromium-free passivation solution will be 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 also belongs to a chromium-free passivation solution, and is characterized in that the passivation solution is an aqueous solution containing water-soluble molybdenum compound, boric acid, wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D167/00C09D125/14C09D163/00C09D175/04C09D133/04C09D127/12C09D7/12C09D5/08B32B15/08
Inventor 许哲峰陈永徐权冉长荣汤佩林周一林
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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