外加极化电位对316L不锈钢微动磨蚀行为的影响

采用球－平面接触微动磨损试验机考察了轧制固溶316L不锈钢在不同极化状态下的微动磨蚀行为。结果表明：在阳极极化状态下，随着极化电位的升高，腐蚀疲劳微断裂作用增强，促进了微动损伤过程的发展；在阴极保护状态下，摩擦系数随微动过程的变化规律及微动损伤形貌与阳极极化态下的存在显著差异，在阴极极化态下，微动磨擦副之间的粘着导致较高的微动摩擦应力状态，但与阳极极化态相比并未产生严重损伤。

The Effect of Applied Potential on the Fretting Corrosion-wear Behavior of 316L Stainless Steel

The influence of applied potential on the fretting corrosion wear behavior of 316L stainless steel in saline solution has been investigated with a test rig of ball on plane contact configuration. It has been found that under anodic polarization conditions, the friction coefficients and especially the steady state fretting wear process is dependent on the anodic polarization parameters. The higher the applied potential, the more severe the fretting damage will be. This is because 316L stainless steel is of high chemical activity under anodic polarization, which promotes the fretting damage of the steel. Contrary to the above, the fretting damage of 316L stainless steel is effectively prevented by cathodic protection. This is because the adhesion between the contact surfaces of the fretting pair can be abated by cathodic protection, though a relatively higher friction coefficient is recorded in this case.