Fretting corrosion wear of synergy between mechanical and electrochemical for biomaterials in hanks balanced salt solution
The objective of the present work was to characterize the fretting corrosion behavior of Co-Cr-Mo and Ti-6A1-4V alloys using fretting,corrosion and electrochemical techniques under corrosion and corrosive fretting conditions. The material removal caused by syn ergistic interaction of fretting and corrosion is much larger than the summation of individual fretting and corrosion loss. The increment of removal should result from the synergistic effect of mechanical and corrosive losses of materials,i.e. The acceleration of corrosion by fret ting and the increase of fretting by corrosion. The fretting corrosion behaviors of biomaterials,Co-Cr-Mo and Ti-6A1-4V alloys were inves tigated. The total removals of materials should come from five components,pure corrosion,pure mechanical wear,corrosion increment caused by fretting,fretting increment caused by corrosion and synergy.Experimental results showed that the dissolution processes of ma terials were accelerated significantly by fretting. The approximate removals of materials caused by synergy in hanks balanced salt solution are 55.70% for Co-Cr-Mo alloy and 46.50% for Ti-6A1-4V alloy of total loss,respectively. The synergistic process of materials was dis cussed based on three important stages,pure mechanical,pure electrochemical and synergy. The results suggested that both factors of materials and surface contact state should be considered simultaneously for the protection of biomaterials under fretting corrosion condi tions. The possible mechanism responsible for synergy between mechanical and electrochemical was also discussed.
fretting corrosion synergistic interaction biomaterials electrochemical factors
LI Jiwu A.Iwabuchi
College of Mechanical Engineering,Jiaxing University,Jiaxing 314001,China Department of Mechanical Engineering,Iwate University,4-3-5 Ueda,Morioka 020-8551,Japan
国际会议
The 10th China-Russia System on Advanced Materials and Technologies(第十届中俄新材料新工艺研讨会)
浙江嘉兴
英文
514-520
2009-10-20（万方平台首次上网日期，不代表论文的发表时间）