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| FRETTING CORROSIONWEARTRANSFERABILITY OF 316L STAINLESS STEEL |
| ;;Jiuqing Li |
| 北京科技大学腐蚀与防护中心 腐蚀、磨蚀与表面技术开放研究实验室 |
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Abstract A sphereplane contact device has been used to stu d y the fretting corrosionwear transferability of 316L stainless steel in saline solution. The evolution of fretting damage rates such as the total weight loss r ate (KTt), mechanical damage rate (Kmt), corrosion rate (K ct) and the damage induced by the synergistic effect between mechanical and chemical actions as a function of fretting cycle has been investigated. In t he same time, the variation of the components of mechanical action, corrosion ac tion and the synergistic effect in the total weight loss rate have also been stu died. The variations of KTt,Kmt,Kct were equal to each other. In spite of the difference between the variation of Kct an d the variations of KTt,Kmt,Kct,the fretting of 31 6L stainless steel was characteristic of three stages. And each of these three s tages was of the different mechanism. In the beginning of fretting the damage oc curred in local areas, and the material suffered ploughing damage because of the hard debris formed by fabrication of passive film. In the second period, seriou s crevice corrosion occurred nearby the fretted region, which has taken a great important role in the fretting process. And in the final period, the damage mech anism could be defined as corrosive flaking process. The results showed there wa s a relationship between the of damage rates and mechanisms. The synergistic eff ect took an important role in fretting, and in stable stage, more than 60 percent of fretting damage was due to the conjoint action of mechanical and chemical effects. The result finds the inter relationship between the transition s of fretting damage rates and the synergistic effect and the variation of damag e mechanisms in different fretting periods.
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Received: 14 February 2000
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