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Research progress on pitting mechanism for electrochemical machining of titanium alloys |
LI Haiyang, ZHAN Zhongwei, LUO Chen, SUN Zhihua |
AECC Key Laboratory of Advanced Corrosion and Protection for Aviation Material, AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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Abstract: Electrochemical machining is usually used to shape titanium and titanium alloys because it has high efficiency and great capability to manufacture thin-walled and special-shaped components. However,the passive film and formation of pitting corrosion on both workpiece surface and the non-machined part are the main drawbacks when the machining uses low working electric currents. Therefore, research on pits initiation, pits growth and pits control during electrochemical machining is in great need. This paper reviews the research progress on cause, prevention, and control of pitting corrosion of titanium alloys during electrochemical machining. Meanwhile, the advantages and weaknesses of each strategy are well illustrated. The research trend in pitting corrosion for electrochemical machining of titanium is also presented.
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Received: 07 September 2021
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