Method for preparing corrosion-resisting wear-proof ceramic coat on TA15 titanium alloy surface

A technology of wear-resistant ceramics and titanium alloys, which is applied in the field of preparation of anti-corrosion and wear-resistant ceramic coatings on the surface of titanium alloys, can solve the problems of metal corrosion, poor wear resistance and friction reduction of TA15 alloys, and achieve the effect of solving metal corrosion

Inactive Publication Date: 2008-09-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of poor wear resistance and friction reduction of TA15 alloy, and when TA15 is used in contact with other dissimilar metals in a corr

Method used

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Experimental program
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Effect test

specific Embodiment approach 1

[0007] Specific Embodiment 1: The preparation method of the anti-corrosion and wear-resistant ceramic coating on the surface of TA15 titanium alloy in this embodiment is as follows: 1. The surface of TA15 titanium alloy is polished to a smoothness of 0.5-2.0, and then the TA15 titanium alloy is ultrasonicated in acetone Cleaning for 3 to 5 minutes; 2. Put the cleaned TA15 titanium alloy in a stainless steel tank with alkaline electrolyte, use the TA15 titanium alloy as the anode, and the stainless steel tank as the cathode. The frequency is 400-800Hz, the pulse duty ratio is 4-20%, and the temperature of the alkaline electrolyte is 0-50 °C under the condition of micro-arc oxidation for 30-80 minutes, and the ceramic with a thickness of 10-50 μm is obtained on the surface of the TA15 titanium alloy. coating, wherein the concentration of the alkaline electrolyte in step 2 is 5-100 g / L.

[0008] In this embodiment, the TA15 titanium alloy cleaned in step 1 is placed in NaAlO 2 T...

specific Embodiment approach 2

[0010] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the solute of the alkaline electrolyte described in step two is sodium silicate, sodium metaaluminate, trisodium phosphate, sodium hexametaphosphate, sodium hypophosphite, One or a combination of sodium tungstate, sodium carbonate or sodium molybdate. Others are the same as in the first embodiment.

[0011] In this embodiment, when the solute of the alkaline electrolyte is a composition, various compositions are mixed in any proportion.

specific Embodiment approach 3

[0012] Embodiment 3: This embodiment differs from Embodiment 1 in that the pulse voltage in step 2 is 401-500V. Others are the same as in the first embodiment.

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Abstract

The invention relates to a preparation method for a TA15 titanium alloy surface corrosion resistant and abrasion resistant ceramic coating. The invention solves the problems of bad abrasion resistance of TA15 alloys and severe corrosion of the TA15 and metals which contact the TA15 when the TA15 contacts other dissimilar metals for use in corrosive environment. The invention comprises the following steps that: the TA15 titanium alloys after surface grinding and ultrasonic cleaning are arranged inside a stainless steel bath body which is provided with alkaline electrolytes; the TA15 titanium alloys are used as an anode and the stainless steel bath body is used as a cathode; micro-arc oxidation is performed under the condition of 400 to 600 volt pulse voltage, 400 to 800 herz frequency, 4 to 20 percent duty ratio and 0 to 50 DEG C temperature. The shear strength of the oxide coating obtained by the method reaches 50 to 80 million pascals; when the oxide coating is used on a component of an airplane, a ship or a naval vessel, the coating prevents direct contact of dual components of dissimilar metals and prevents the metals from being corroded.

Description

technical field [0001] The invention relates to a method for preparing a corrosion-resistant and wear-resistant ceramic coating on the surface of a titanium alloy. Background technique [0002] Titanium and titanium alloys are widely used in aerospace and ship parts due to their light weight, high mechanical strength, and good corrosion resistance. TA15 is a titanium alloy brand imported from Russia and localized in recent years. Lightweight and high strength, it is mainly used in the manufacture of aircraft parts. However, although the TA15 titanium alloy has high strength, it has low hardness and poor wear resistance. In addition, the titanium dioxide film formed by natural oxidation on the surface of the TA15 alloy has a standard electrode potential of 0.86V, which is very beneficial for improving its corrosion resistance. But its electrode potential is much higher than that of iron (-0.44), copper (0.34), tin (-0.136), lead (-0.126) and antimony (0.75). When titanium al...

Claims

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Application Information

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IPC IPC(8): C25D11/26
Inventor 王亚明郭立新张鹏飞周玉贾德昌欧阳家虎
Owner HARBIN INST OF TECH
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