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Preparation method for titanium alloy micro-arc oxidation ceramic film

A technology of micro-arc oxidation and ceramic film layer, which is applied in the direction of coating, surface reaction electrolytic coating, electrolytic coating, etc., can solve the problems of poor wear resistance and corrosion resistance, low surface hardness of titanium alloy, etc., and achieve high production efficiency , less environmental pollution, less power consumption

Inactive Publication Date: 2017-12-12
NINGBO RUILONG SURFACE TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Titanium alloys have excellent comprehensive properties such as light weight, high specific strength, and good thermal stability, and are widely used in aerospace and civil industries. However, titanium alloys have low surface hardness, poor wear resistance and corrosion resistance, which limits its further application

Method used

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  • Preparation method for titanium alloy micro-arc oxidation ceramic film

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Embodiment 1

[0016] (1) Configure the electrolyte, the concentration of the electrolyte is: sodium hexametaphosphate 20 g / L, sodium molybdate 15 g / L, potassium hydroxide 5 g / L, glycerin 15 g / L;

[0017] (2) Micro-arc oxidation was performed on the cleaned titanium alloy surface with a DC pulse micro-arc oxidation device, and the current density was 5 A / dm 2 , the frequency is 400 HZ, the duty cycle is 4%, the temperature is controlled at 20-30°C, and the constant-current micro-arc oxidation time is 30 min under constant stirring.

Embodiment 2

[0019] (1) Configure the electrolyte, the concentration of the electrolyte is: sodium hexametaphosphate 30 g / L, sodium molybdate 5 g / L, potassium hydroxide 3 g / L, glycerin 30 g / L;

[0020] (2) Use DC pulse micro-arc oxidation device to perform micro-arc oxidation on the cleaned titanium alloy surface with a current density of 10A / dm 2 , the frequency is 400 HZ, the duty cycle is 4%, the temperature is controlled at 20-30 ° C, and the constant current micro-arc oxidation time is 10 min under constant stirring.

Embodiment 3

[0022] (1) Configure the electrolyte, the concentration of the electrolyte is: sodium hexametaphosphate 40 g / L, sodium molybdate 10 g / L, potassium hydroxide 2 g / L, glycerin 10 g / L;

[0023] (2) Micro-arc oxidation was performed on the cleaned titanium alloy surface with a DC pulse micro-arc oxidation device, and the current density was 15 A / dm 2 , the frequency is 400 HZ, the duty cycle is 4%, the temperature is controlled at 20-30 ° C, and the constant current micro-arc oxidation time is 10 min under constant stirring.

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Abstract

The invention provides a method for preparing a titanium alloy micro-arc oxidation ceramic film. The steps are as follows: (1) Electrolyte is configured, and the composition concentration of the electrolyte is: sodium hexametaphosphate 20-40 g / L, sodium molybdate 5 ‑20 g / L, potassium hydroxide 2‑5 g / L, glycerin 10‑30 g / L; (2) Micro-arc oxidation was performed on the cleaned titanium alloy surface with a current density of 5 ‑15 A / dm2, the frequency is 400 HZ, the duty cycle is 4%, the temperature is controlled at 20‑30 °C, and the constant current micro-arc oxidation time is 10‑30 min under constant stirring. The surface of the prepared ceramic film layer is relatively smooth and the roughness is small; the wear resistance of the obtained film layer is greatly improved; the process is simple, the production efficiency is high, the consumption of electric energy is small, the cost is low, and the environmental pollution is small.

Description

technical field [0001] The invention belongs to the surface treatment technology of titanium alloy micro-arc oxidation, and in particular relates to a preparation method of a titanium alloy micro-arc oxidation ceramic film layer. Background technique [0002] Titanium alloys have excellent comprehensive properties such as light weight, high specific strength, and good thermal stability, and are widely used in aerospace and civil industries. However, titanium alloys have low surface hardness, poor wear resistance and corrosion resistance, which limits its further application. Therefore, it is necessary to modify the surface of titanium alloy to improve its surface properties. Among them, micro-arc oxidation technology has achieved good results in practice. [0003] Micro-arc oxidation is developed from ordinary anodic oxidation. Its basic principle is: it breaks through the current and voltage limitations of traditional anodic oxidation, and increases the anode voltage from...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26
CPCC25D11/26
Inventor 宋若希庄俊杰宋仁国孔德军李红霞熊缨
Owner NINGBO RUILONG SURFACE TECH CO LTD
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