Inhibition effect on microbiologically influenced corrosion of Ti-6Al-4V-5Cu alloy against marine bacterium Pseudomonas aeruginosa. (20th May 2022)

• Record Type: Journal Article
• Authors: Arroussi, Mohammed; Jia, Qing; Bai, Chunguang; Zhang, Shuyuan; Zhao, Jinlong; Xia, Zhizhou; Zhang, Zhiqiang; Yang, Ke; Yang, Rui
• Is Part Of: Journal of materials science & technology. Volume 109(2022)
• Page Start: 282
• Page End: 296
• Publication Date: 2022-05-20
• Subjects: Titanium alloy -- Biocorrosion inhibition -- Passive film -- P. aeruginosa; Metals -- Periodicals; Materials science -- Periodicals; Materials science; Metals; Periodicals; 620.1105
• DOI: 10.1016/j.jmst.2021.08.084
• Languages: English
• ISSNs: 1005-0302

Abstract

Highlights: Electrochemical behavior of ti-6al-4v-5cu alloy in the presence of Pseudomonas aeruginosa . Effect of Ti2 Cu intermetallics on the passivity system of the alloy in the presence of Pseudomonas aeruginosa . Antibacterial ability and inhibition efficiency of ti-6al-4v-5cu alloy against Pseudomonas aeruginosa . Abstract: 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 TiO2 . With increasing sputtering thickness to 6 nm, Ti2 O3 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 Ti6Al4V alloy was predominantly composed of TiO2 but Ti2 O3 (22.8%), Al2 O3 and V2 O5 were also detected. With increasing sputtering depth to 6 nm, fitting revealed the presence of Ti2 O3 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. Graphical abstract: Image, graphical abstract