乙醇胺溶液中Inconel690合金微动磨损与腐蚀的交互作用

采用PLINT微动腐蚀试验机,位移幅值为100~200μm,法向载荷为20~80 N,频率为2 Hz,循环次数为10000次,在乙醇胺(ETA)溶液中对Inconel690合金进行了切向微动腐蚀试验。结果表明:微动腐蚀与磨损呈"负交互作用",其原因是表面膜和腐蚀产物组成的第三体层参与微动磨损过程,改变了摩擦接触界面状态;微动使自腐蚀电位负移,位移幅值增加,引起腐蚀速率增大;Inconel690合金在ETA溶液中的微动磨损机制主要表现为磨粒磨损和剥层的共同作用。

Fretting Corrosion and Wear Interactions of Inconel690 Alloy in Ethanolamine Solution

Fretting corrosion test of Inconel690 in ethanolamine (ETA) solution was carried out by PLINT fretting corrosion rig under the conditions of displace amplitudes 100-200 μm,normal loads from 20 N to 80 N,frequency 2 Hz and number of fretting cycles 10 000.The results showed that the reason of the negative interaction between fretting corrosion and wear was that the surface film and corrosive products of the third layer took part in the process of fretting wear.The frictional contact interface states were changed.The self corrosion potential showed a more obvious negative shift during the fretting,and corrosion rate increased with increasing displacement.Abrasive wear and delamination were main fretting wear mechanisms of Inconel690 alloy in ETA solution.