Manufacturing method of metal oxidation layer

Abstract

The invention provides a manufacturing method of a metal oxidation layer. The manufacturing method comprises the following steps: first, providing a metal member, then placing the metal member in an electrolyte to process the metal member by utilizing a micro-arc oxidation technology, and finally forming a metal oxidation layer on the surface of the metal member; wherein the electrolyte comprises the following components: sodium hexametaphosphate, sodium silicate, sodium metaaluminate, sodium hydroxide, sodium tungstate, and sodium carbonate. Thus a high hardness surface of the metal member is generated to avoid destructions and abrasions on the metal member, furthermore, the surface of the metal member is provided with small micro-holes to prevent accumulation of foreign substances, so that the metal member coated by the metal oxidation layer has a very high practicability.

Description

technical field [0001] The invention relates to a method for manufacturing an oxide layer, in particular to a method for manufacturing a metal oxide layer with a high-hardness oxide layer. Background technique [0002] It is known that surface treatment is usually performed on the surface of metals to form an oxide film layer with high hardness and strong corrosion resistance on the surface, and micro-arc oxidation technology is one of the most important surface treatment methods today. Micro-arc oxidation technology (also known as plasma oxidation, micro-plasma oxidation, anode spark deposition, spark discharge anode deposition and surface ceramization, etc.) is a technology that directly grows an oxide film on the metal surface in situ. In the micro-arc oxidation process, the matrix metal reacts strongly with oxygen ions and electrolyte ions under the joint action of thermochemistry, electrochemistry, and plasma chemistry, undergoes melting, eruption, crystallization, and ...

AI Technical Summary

Problems solved by technology

The metals or alloys formed by the aforementioned methods can indeed increase the hardness or corrosion resistance. Generally, the thickness of cast iron is still insufficient, which also causes wear on the surface

Furthermore, the surface of the metal or alloy obtained by the aforementioned method has a material difference from its internal metal or alloy. If the metal or alloy is used in high-temperature products or equipment, cracks or even cracks will occur due to its different properties or expansion coefficients. cracked situation

[0005] Therefore, the effect of the method through the above-mentioned surface is poor, and the micro-arc oxidation treatment is required to produce a hard oxide ceramic layer on the surface of the metal or alloy. However, there are some problems in the existing micro-arc oxidation treatment that need to be improved. If the hardness of the oxide ceramic layer formed by the existing production is not enough, there will still be wear and tear. In addition, the surface holes of the oxide ceramic layer formed by the existing production are too large, and foreign matter is easy to fill and accumulate. Therefore, the existing manufacturing still has considerable room for improvement.

[0006] Since the existing technology is still unable to perfectly deal with such problems, it is necessary to break through, improve and solve them.

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