Inhibition effect on microbiologically influenced corrosion of Ti-6Al-4V-5Cu alloy against marine bacterium Pseudomonas aeruginosa  

作　　者：Mohammed Arroussi Qing Jia Chunguang Bai Shuyuan Zhang Jinlong Zhao Zhizhou Xia Zhiqiang Zhang Ke Yang Rui Yang 

机构地区：[1]Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China [2]School of Materials Science and Engineering,University of Science and Technology of China,Hefei 230022,China

出　　处：《Journal of Materials Science & Technology》2022年第14期282-296,共15页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.U1906226);the United Research&Development Program(No.E049A201);the National Key Research and Development Program(No.2017YFB0306201);the support of CAS-TWAS President Fellowship。

摘　　要：With rapid development of marine infrastructures,materials with better biocorrosion resistance and antibiofouling performance will be highly demanded.Ti6Al4V alloy is susceptible to the above.The inhibition to the microbiologically influenced corrosion of Ti6Al4V-5Cu alloy against Pseudomonas aeruginosa was investigated using antibacterial test,electrochemical techniques,surface analysis,and weight loss test conducted for 2.5 months.At a sputtering depth of 0 nm,the passive film of Ti6Al4V-5Cu alloy was mainly composed of ideal oxide TiO_(2).With increasing sputtering thickness to 6 nm,Ti_(2)O_(3)and TiO were detected with a relative fraction of 14.6%and 14.8%,respectively,in the oxide layer of Ti6Al4V-5Cu alloy.In contrast,the outermost layer of Ti6AlV alloy was predominantly composed of TiO_(2)but Ti_(2)O_(3)(22.8%),Al_(2)O_(3)and V_(2)O_(5) were also detected.With increasing sputtering depth to 6 nm,fitting revealed the presence of Ti_(2)O_(3)and TiO with relative fractions of 25.3%and 35.8%,respectively.Yet,a spot of TiO(8%)was also observed at 12 nm in the oxide layer of Ti6Al4V alloy.Although the addition of Cu into Ti6Al4V alloy generated the self-healing property of passive film in the presence of P.aeruginosa,it also reduced resistance to corrosion in general condition.

关 键 词：Titanium alloy Biocorrosion inhibition Passive film P.aeruginosa 

分 类 号：TG146.23[一般工业技术—材料科学与工程]