Titanium and titanium alloy surface anodic oxidation coloring method

Abstract

The invention discloses a titanium and titanium alloy surface anodic oxidation coloring method and belongs to the technical field of metal surface treatment. The method includes the following steps that a cleaned commercial pure titanium sample is put in a solution with a proportion of HF: HNO3: H2O for electrolytic polishing; the cleaned and dried sample is put in a mixed solution of concentrated sulfuric acid and methanesulfonic acid for anodic oxidation treatment; and the sample obtained after being subjected to the anodic oxidation treatment is rapidly cleaned through ethyl alcohol and deionized water and then dried under the vacuum condition so that the colored sample can be obtained. Anodic oxide films in different colors are obtained through control over anodic oxidation voltage and treatment time, and the anodic oxide films are bright and uniform in color and luster and good in corrosion resistance.

Description

technical field

[0001] The invention relates to a method for anodic oxidation and coloring of titanium and titanium alloy surfaces, belonging to the technical field of metal surface treatment. Background technique

[0002] Titanium and titanium alloys have good mechanical and mechanical properties, low density, high stiffness, low hardness, high temperature resistance, and good corrosion resistance. They are widely used in aerospace, automotive, military, and chemical industries. Titanium and titanium alloys also have some inherent defects, such as low hardness, poor wear resistance, and poor thermal and electrical conductivity. When titanium is in contact with parts of other metal materials, due to the excessive potential difference, galvanic corrosion is very easy to occur, resulting in corrosion of the parts connected to it. In order to further improve the use characteristics of titanium and titanium alloys, it is necessary to carry out surface treatment and modification...

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