Method for preparing graphene oxide and micro-arc oxidized ceramic composite coating on surface of magnesium alloy

A ceramic composite film and micro-arc oxidation technology, which is applied in anodic oxidation, metal material coating process, coating, etc., can solve the problems of poor corrosion resistance, achieve the effects of improved corrosion resistance, stable structure, and corrosion prevention
CN104878377AInactive Publication Date: 2015-09-02HARBIN INST OF TECH

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HARBIN INST OF TECH
Publication Date
2015-09-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a method for preparing a graphene oxide and micro-arc oxidized ceramic composite coating on the surface of a magnesium alloy and relates to a method of preparing a coating on the surface of the magnesium alloy. The method is used for solving the problem of poor corrosion resistance of the micro-arc oxidized ceramic coating of a porous structure due to large contact area of the coating with a corrosive medium in the corrosion process. The method comprises the following steps: 1, magnesium alloy pre-processing; 2, ultrasonic processing; 3, oil removal; 4, micro-arc oxidization; 5, graphene oxide preparation; 6, application of the graphene oxide solution to the micro-arc oxidized ceramic coating on the magnesium alloy, thereby obtaining the magnesium alloy coated with the graphene oxide and micro-arc oxidized ceramic composite coating. According to the method, the corrosion current density of the graphene oxide and micro-arc oxidized ceramic composite coating is reduced to 14.5nA / cm<2>, which is 1 / 7240 of the corrosion current of the matrix magnesium alloy. The invention relates to the method for preparing the graphene oxide and micro-arc oxidized ceramic composite coating on the surface of the magnesium alloy.
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Description

technical field

[0001] The invention relates to a method for preparing a film layer on the surface of a magnesium alloy. Background technique

[0002] Graphene is a new two-dimensional nanomaterial discovered in 2004. The unique electronic and physical properties of graphene have important application prospects in the fields of molecular electronics, micro-nano devices, composite materials, field emission materials, sensors, batteries and hydrogen storage materials. From graphene, people have seen the possibility of more practical use of carbon nanomaterials, so although the discovery of graphene has only been a few decades, it has aroused great research interest of scientists, and it has quickly become a material science and condensation technology. It is a research hotspot in the field of state physics, has important theoretical and experimental research value, and is expected to set off a new technical revolution of carbon nanomaterials in the 21st century.

[0003] Stu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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