论文部分内容阅读
采用球－平面接触微动磨损设备，对轧制固溶３１６Ｌ不锈钢在０．９％ＮａＣｌ溶液微动过程中局部腐蚀的作用进行了研究．结果表明微动是使不锈钢发生腐蚀的主导因素．开路状态下，３１６Ｌ不锈钢在微动过程中发生严重缝隙腐蚀，金属离子在微动区外发生氧化反应，生成碱性氢氧化物沉淀，加剧了微动区中心的贫氧特征，并改变了材料表面钝化膜与基体间的应力状态，使材料表面氧化膜发生局部损伤，成为主导微动损伤扩展的主要因素之一．在强阳极极化态下，微动区边缘磨屑诱发点蚀，促进了微动损伤区的扩展过程，增大了不锈钢的微动失重
The effect of the localized corrosion on the rolling solid solution 316L stainless steel during the fretting of 0.9% NaCl solution was studied by ball-plane contact fretting wear equipment. The results show that fretting is the dominant factor in corrosion of stainless steel. In open state, 316L stainless steel undergoes serious crevice corrosion during the fretting process. Metal ions undergo oxidation reaction outside the fretting zone to form alkaline hydroxide precipitate, aggravating the oxygen-depleted features in the center of the fretting zone and changing the material Surface passivation film and the matrix between the stress state, the local oxide film on the surface of the material damage, leading to the expansion of the fretting damage is one of the main factors. In the strong anodic polarization state, fretting edge edge debris induced pitting corrosion, promote the expansion of fretting damage zone, increasing the fretting of stainless steel