Role et influence des ions H SO4− sur la corrosion du nickel en milieu sulfurique

✍ Scribed by M.C. Petit; A. Casanova; A. Jouanneau

• Book ID: 103906511
• Publisher: Elsevier Science
• Year: 1979
• Weight: 448 KB
• Volume: 4
• Category: Article
• ISSN: 0390-6035
• DOI: 10.1016/0390-6035(79)90095-6

✦ Synopsis

Re~u le 18 D6cembre 1978; accept6 le 16 Janvier 1979 Summary -The purpose of this paper is to study the electrochemical behaviour of nickel in sulphuric media, in the corrosion potential range. The experimental results obtained within wide enough ranges of electrolyte composition at constant pH, show the prominent part taken by the HSO~ anions. We propose a reaction scheme for interpreting and simulating the different polarization curves, from the hydrogen evolution to the nickel passivity. An important feature of the present results is that the H SO4" anions may be adsorbed preferentially on the metal surface in a large potential range. Nevertheless, the passivity of nickel is only done by the OH" anions.