Method for preparing silicon oxide ceramic coatings on steel member through electrophoretic deposition

An electrophoretic deposition method and ceramic coating technology, which is applied in the direction of coating, electrolytic coating, electrophoretic plating, etc., can solve the problems of weak film/substrate binding force, difficulty, easy peeling process, etc., and achieve good compactness and uniform composition , The effect of simple process

Inactive Publication Date: 2012-10-17
SHENYANG LIGONG UNIV
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Problems solved by technology

However, preparing ceramic coatings directly on carbon steel, stainless steel, and low-alloy steel substrates has technical difficulties

Method used

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Embodiment Construction

[0013] A method for preparing a silicon oxide ceramic coating by electrophoretic deposition on a steel piece, comprising the following process steps:

[0014] 1) Pretreatment: The workpiece is used as a ceramic coating or composite ceramic coating substrate. The workpiece can be steel, copper, zinc, nickel, tin and their alloys, and the substrate is pretreated. The pretreatment process is: sequentially use coarse sandpaper 、1000 # , 1500 # and 2000 # Metallographic sandpaper step by step grinding, water washing, chemical degreasing, hot water washing, cold water washing, electrochemical degreasing, hot water washing, cold water washing, pickling, two cold water washing, phosphating or electroplating nickel or composite nickel plating or electrogalvanizing , copper and other metals that can be used as intermediate layers are known technologies;

[0015] 2) Preparation of the intermediate transition layer: nickel sulfate is used as the main salt, nickel chloride is used as th...

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Abstract

The invention discloses a method for preparing silicon oxide ceramic coatings on surfaces of Fe, Cu, Zn, Ni, Sn and their alloy through electrophoretic deposition. The method comprises the following steps: carrying out dark nickel electroplating or composite nickeling, or phosphorizing with above metals as electrophoretic silicon oxide coating matrixes, nickel sulfate as a main salt, nickel chloride as an anodic activator, boric acid as a buffering agent and Al2O3 as a powder body; carrying out electrophoretic deposition on the nickeled or phosphorized metal matrixes in a prepared silicon oxide sol; drying the matrixes; and sintering the matrixes to obtain the silicon oxide ceramic coatings. The method provided in the invention, which uses the electrophoretic deposition, has the characteristics of simple technology and no need of expensive or complex devices, and the prepared ceramic coatings have better compactness than pulled films, and have good performances and uniform components. The method can be used for preparing wear resistant coatings and high temperature oxidation resistant coatings on surfaces of metals especially common steel and above metals, can substitute hard chromium electroplating technologies with severe pollutions, and has the advantages of cleanness, no pollution and easy industrialization realization.

Description

technical field [0001] The invention belongs to the field of metal surface treatment, and relates to a method for preparing a silicon oxide ceramic coating by electrophoretic deposition technology, in particular to a method for preparing a silicon oxide ceramic coating by electrophoretic deposition on a steel piece. Background technique [0002] Surface modification technology can improve the surface properties of metal materials, prevent or delay the failure of workpieces, and prolong the service life of workpieces and equipment, which has huge economic benefits. Ceramic materials have high hardness, good wear resistance, corrosion resistance and high temperature oxidation resistance. The preparation of ceramic coatings on metal surfaces can combine the above advantages of ceramic materials with the advantages of high plasticity and toughness of metal materials to obtain workpieces with good comprehensive properties. At present, steel-based ceramic coating preparation techn...

Claims

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Application Information

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IPC IPC(8): C25D13/20C25D13/02C25D13/10
Inventor 周琦万文露
Owner SHENYANG LIGONG UNIV
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