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

Michael O. Bodunrin; Lesley H. Chown; Josias W. van der Merwe; Kenneth K. Alaneme

doi:10.1002/maco.201709709

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

Michael O. Bodunrin, Lesley H. Chown, Josias W. van der Merwe, Kenneth K. Alaneme

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	770-780
Number of pages	11
Journal	Materials and Corrosion - Werkstoffe und Korrosion
Volume	69
Issue number	6
DOIs	https://doi.org/10.1002/maco.201709709
Publication status	Published - Jun 2018
Externally published	Yes

Keywords

low-cost titanium
open circuit potential
passivation
polarisation

ASJC Scopus subject areas

Environmental Chemistry
Mechanics of Materials
Mechanical Engineering
Surfaces, Coatings and Films
Metals and Alloys
Materials Chemistry

Access to Document

10.1002/maco.201709709

Cite this

@article{592d1d31aef849448481388091ce1197,

title = "Corrosion behaviour of Ti-Al-xV-yFe experimental alloys in 3.5 wt% NaCl and 3.5 M H2SO4 ",

abstract = "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.",

keywords = "low-cost titanium, open circuit potential, passivation, polarisation",

author = "Bodunrin, {Michael O.} and Chown, {Lesley H.} and {van der Merwe}, {Josias W.} and Alaneme, {Kenneth K.}",

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year = "2018",

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AU - Bodunrin, Michael O.

AU - Chown, Lesley H.

AU - van der Merwe, Josias W.

AU - Alaneme, Kenneth K.

PY - 2018/6

Y1 - 2018/6

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AB - 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.

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KW - passivation

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