Effect of Induced Charge on the Passivity and Passivity Breakdown of 304LN Stainless Steels | Zendy

Gargi Roy Chowdhury | Zendy; Pinaki Mitra | Zendy

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Effect of Induced Charge on the Passivity and Passivity Breakdown of 304LN Stainless Steels

Author(s) -

Gargi Roy Chowdhury,

Pinaki Mitra

Publication year - 2011

Publication title -

advances in materials science and engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.356

H-Index - 42

eISSN - 1687-8442

pISSN - 1687-8434

DOI - 10.1155/2011/798262

Subject(s) - materials science , passivity , aluminium , chloride , electrode , graphite , adsorption , point of zero charge , ion , metallurgy , corrosion , composite material , electrical engineering , chemistry , organic chemistry , engineering

Passivity breakdown of stainless steel by pitting in chloride environment is believed to occur at point at zero charge (pzc). So, the nature and quantity of charge on the surface plays a very important role on the breakdown of passivity, as chloride ion adsorption depends on that. In this work a DC potential was maintained between aluminium and graphite electrodes, and the aluminium electrode, in turn, was kept in the vicinity of the working electrode in the potentiostatic circuit. Both positive and negative polarity was applied on aluminium to attract or repel chloride ions in the vicinity of the working electrode. Chloride adsorption pattern on the stainless steel electrode got drastically altered due to application of DC potential on the aluminium-graphite circuit

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