Corrosion behaviour of Ti‐Al‐xV‐yFe experimental alloys in 3.5wt% NaCl and 3.5M H2SO4

• Published in: Materials and corrosion Vol. 69; no. 6; pp. 770 - 780
• Main Authors: Bodunrin, Michael O, Chown, Lesley H, Josias W van der Merwe, Alaneme, Kenneth K
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01.06.2018
• Subjects: Alloy development; Chemical industry; Chloride resistance; Corrosion resistance; Corrosion resistant alloys; Iron; Open circuit voltage; Repair & maintenance; Sodium chloride; Sulfuric acid; Titanium alloys; Titanium base alloys; Vanadium
• DOI: 10.1002/maco.201709709
• ISSN: 0947-5117

The corrosion behaviour of Ti‐6Al‐xV‐yFe (where x + y = 4; x = 0–3; and y = 1–4) experimental alloys in comparison with commercial Ti‐6Al‐4V alloy was investigated in sodium chloride and sulphuric acid solutions. Iron, a less expensive beta stabilising element was substituted for vanadium in the newly developed alloys in order to assess the influence of iron addition on the corrosion performance of the alloys. Electrochemical parameters were obtained using open circuit potential and potentiodynamic polarisation measurements. The results show that partial replacement of vanadium with 2–3 wt% iron yielded excellent corrosion resistance in 3.5 wt% sodium chloride. The experimental alloys have better corrosion resistance than the commercial Ti‐6Al‐4V alloy in 3.5 M sulphuric acid.