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A kind of method and protective coating of nickel-free stainless steel coating hydroxyl graphene modified electrophoretic paint

A hydroxyl graphene and stainless steel technology, applied in electrophoretic coatings, coatings, anti-corrosion coatings, etc., can solve the problem of not being able to completely achieve nickel-free, improve chemical stability and solubility, avoid aggregation and precipitation, and improve corrosion resistance. sexual effect

Active Publication Date: 2021-12-24
GUANGZHOU ULTRA UNION CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it is not yet able to fully achieve the goal of nickel-free
[0004] Therefore, how to make the processing technology and surface treatment technology of nickel-free stainless steel can achieve the purpose of nickel-free, and at the same time, it can also improve the corrosion resistance of nickel-free stainless steel, and there are no related reports.

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  • A kind of method and protective coating of nickel-free stainless steel coating hydroxyl graphene modified electrophoretic paint

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Effect test

Embodiment 1

[0065] Such as figure 1 As shown, from bottom to top, it includes 0Cr13 stainless steel substrate, trivalent chromium white chrome coating 0.1 μm and hydroxyl graphene modified electrophoretic paint coating 8 μm;

[0066] The method of coating nickel-free stainless steel with hydroxygraphene modified electrophoretic paint is as follows:

[0067] After the surface of the 0Cr13 stainless steel substrate is drawn with a felt wheel wire drawing machine, the surface of the nickel-free stainless steel after wire drawing is sequentially subjected to alkaline chemical degreasing, water washing, alkaline cathode electrolytic degreasing, water washing, alkaline anode electrolytic degreasing, water washing, Cathodic electrolytic activation and washing to obtain pretreated nickel-free stainless steel; in the cathodic electrolytic activation, the nickel-free stainless steel after drawing is used as the cathode, and the graphite rod is used as the anode; the electrolyte is 100g / L sulfuric a...

Embodiment 2

[0072] Such as figure 1 As shown, from bottom to top, it includes 1Cr13 stainless steel substrate, trivalent chromium white chrome coating 0.15 μm and hydroxyl graphene modified electrophoretic paint coating 10 μm;

[0073] The method of coating nickel-free stainless steel with hydroxygraphene modified electrophoretic paint is as follows:

[0074] After the surface of the 1Cr13 stainless steel substrate is drawn with a felt wheel wire drawing machine, the surface of the nickel-free stainless steel after wire drawing is sequentially subjected to alkaline chemical degreasing, water washing, alkaline cathode electrolytic degreasing, water washing, alkaline anode electrolytic degreasing, water washing, Cathodic electrolytic activation and washing to obtain pretreated nickel-free stainless steel; in the cathodic electrolytic activation, the nickel-free stainless steel after wire drawing is used as the cathode, and the graphite rod is used as the anode; the electrolyte is 180g / L sul...

Embodiment 3

[0079] Such as figure 1 As shown, from bottom to top, it includes 2Cr13 stainless steel substrate, trivalent chromium black chrome coating 0.07μm and hydroxyl graphene modified electrophoretic paint coating 15μm;

[0080] The method of coating nickel-free stainless steel with hydroxygraphene modified electrophoretic paint is as follows:

[0081] After the surface of the 2Cr13 stainless steel substrate is drawn with a felt wheel wire drawing machine, the surface of the nickel-free stainless steel after wire drawing is sequentially subjected to alkaline chemical degreasing, water washing, alkaline cathode electrolytic degreasing, water washing, alkaline anode electrolytic degreasing, water washing, Cathodic electrolytic activation and washing to obtain pretreated nickel-free stainless steel; in the cathodic electrolytic activation, the nickel-free stainless steel after wire drawing is used as the cathode, and the graphite rod is used as the anode; the electrolyte is 150g / L sulfu...

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Abstract

The invention relates to the technical field of metal electroplating and coating, in particular to a method for coating a nickel-free stainless steel with a hydroxyl graphene modified electrophoretic paint and a protective coating. The method provided by the invention comprises the following steps: after wire drawing the nickel-free stainless steel, cathodic electrolytic activation is performed on the surface of the nickel-free stainless steel after wire drawing to obtain a pretreated nickel-free stainless steel; electroplating on the surface of the pretreated nickel-free stainless steel A trivalent chromium coating is obtained to obtain nickel-free stainless steel with a trivalent chromium coating; a cathodic electrophoretic coating method is used to coat a hydroxyl graphene modified electrophoretic paint coating on the surface of the nickel-free stainless steel with a trivalent chromium coating. The trivalent chromium coating improves the bonding force between the coating and the nickel-free stainless steel substrate, and at the same time improves the corrosion resistance of the nickel-free stainless steel, overcoming the technical defect of low corrosion resistance of the nickel-free stainless steel; at the same time, the hydroxyl graphene The modified electrophoretic paint coating makes the prepared electrophoretic paint coating have good lubricity, wear resistance and corrosion resistance.

Description

technical field [0001] The invention relates to the technical field of metal electroplating and coating, in particular to a method for coating a nickel-free stainless steel with a hydroxyl graphene modified electrophoretic paint and a protective coating. Background technique [0002] As we all know, nickel is harmful to the human body, and even some people's skin has obvious allergic reaction to nickel. Nickel-free stainless steel, such as 0Cr13 and 1Cr13, is easy to change color or even rust in the natural environment. Therefore, this material has not been commonly used. With the increasing awareness of environmental protection, more and more countries have restricted the use of nickel-containing steel, especially nickel-containing stainless steel parts that come into contact with the human body. Therefore, the manufacturing industry has to replace nickel-containing stainless steel with nickel-free stainless steel. However, if nickel-free stainless steel is used to make ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D3/06C25D5/36C25D7/06C25D15/00C09D177/00C09D161/20C09D5/44C09D5/08C09D7/61C09D7/65
CPCC25D3/06C25D5/36C25D7/0607C25D15/00C09D177/00C09D161/20C09D5/4461C09D5/448C09D5/08C08L2201/10C08L2205/035C08L61/20C08L75/04C08L83/04C08K13/02C08K3/042C08L77/00
Inventor 赖奂汶郭崇武陈媚陈康
Owner GUANGZHOU ULTRA UNION CHEM LTD
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