Premium
Pitting corrosion on anodized titanium: Effect of halides
Author(s) -
Prando Davide,
Nicolis Davide,
Pedeferri MariaPia,
Ormellese Marco
Publication year - 2018
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201810171
Subject(s) - anodizing , corrosion , titanium , halide , materials science , metallurgy , pitting corrosion , electrochemistry , oxide , inorganic chemistry , chemistry , aluminium , electrode
Titanium corrosion resistance is high in the majority of environments. However, titanium is susceptible to different forms of corrosion, if exposed to high concentrated halides containing solutions. To face this corrosion problem, expensive titanium alloys are used. An alternative method, consisting of electrochemical anodizing treatment, which promote the formation of a compact titanium oxide on the surface, could be applied to increase titanium corrosion resistance. In this work, titanium samples anodized at 20 V in H 2 SO 4 0.5 M have been tested in sodium fluorides, chlorides, bromides, and iodides at 0.5 and 2.0 M in order to define halides aggressiveness.