Use of the scanning reference electrode technique for the evaluation of environmentally friendly non-chromate corrosion inhibitors
- Univ. of Wales, Swansea (United Kingdom)
The Scanning Reference Electrode Technique (SRET) has been used to study the influence of a range of anodic and cathodic corrosion inhibitors on patterns of localized corrosion occurring on the intact zinc surface of galvanized sheet steel. The SRET can spatially resolve localized anodic and cathodic activity occurring across the zinc surface and has highlighted some promising novel inhibitor species namely rare earth metal salts containing cerium (III), lanthanum (III) and yttrium (111) cations. Conversely anodic inhibitor systems containing tungstate (WO{sub 4}{sup 2{minus}}) and molybdate (MoO{sub 4}{sup 2{minus}}) anions have been shown to induce severe pitting corrosion accelerating perforation of the zinc coating and exposing the steel substrate.
- OSTI ID:
- 697014
- Report Number(s):
- CONF-990401--
- Country of Publication:
- United States
- Language:
- English
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