Effect of the addition of oxo-anions on the corrosion and passivation of tin in synthetic industrial water

Effect of the addition of oxo-anions MoO42-, SiO42-, HPO42- and HCO3- on the corrosion and passivation of tin in a synthetic medium similar to industrial water has been studied by using electrochemical techniques. The results show that tin manifests a passivation phenomenon with breakdown of passivi...

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Bibliographic Details
Published in:Applied surface science 2006-11, Vol.253 (2), p.555-560
Main Authors: Addi, E.H. Ait, Bazzi, L., Elhilali, M., Salghi, R., Hammouti, B., Mihit, M.
Format: Article
Language:English
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Summary:Effect of the addition of oxo-anions MoO42-, SiO42-, HPO42- and HCO3- on the corrosion and passivation of tin in a synthetic medium similar to industrial water has been studied by using electrochemical techniques. The results show that tin manifests a passivation phenomenon with breakdown of passivity. Addition of oxo-anions leads to retard a breakdown of passivation and the inhibition of pitting process of tin. The more marked inhibiting effect is obtained in the presence of MoO42- and SiO42-. The detailed study of the influence of the MoO42- shows that the pitting sensitivity of tin decreases when the molybdate concentration increases in solution. Then, these ions offer a good efficiency even at high temperature and for a chloride concentration up to 0.5 M.
ISSN:0169-4332
DOI:10.1016/j.apsusc.2005.12.110