One of the suggested strategies for preventing crevice corrosion of titanium is by incorporating inhibitors into the solutions. These inhibitors can be anionic species which are intended to inhibit crevice attack when present in solutions, especially in halides. It is well known that oxidizing cationic species such as ferric and cupric ions which are very effective in reducing general corrosion resistance tend to accelerate crevice corrosion when present in bulk chloride solutions. At the same time, certain anionic oxidizing species such as chlorates are believed to inhibit crevice corrosion in halide solutions through crevice diffusion. In this study, both anionic and cationic oxidizing species were incorporated into halide solutions to observe the effects. This study showed that all the anionic species not necessarily inhibit crevice corrosion of titanium and the inhibiting/accelerating mechanism is presented.

Subject
Ions, Sodium chloride, Chloride solutions, Oxidizing species, Crevices, Crevice corrosion, Metals, Corrosion inhibitors, Titanium, Corrosion resistance, Corrosion coupons, Risk reduction, Corrosion potential
Keywords:
titanium, crevice corrosion, oxidizing anionic species, oxidizing cationic species
Government work published by the Association for Materials Protection and Performance (AMPP) with permission of the author(s). Positions and opinions advanced in this work are those of the author(s) and not necessarily those of AMPP. Responsibility for the content of the work lies solely with the author(s).
2013
GOV
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