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Microbial activity involvement on soil corrosion of ductile iron – Electrochemical & microscopic study
Author(s) -
Meroufel Abdelkader,
Ayashi Mohammed,
Touzain Sebastien,
AlSahari Ali
Publication year - 2019
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.201810601
Subject(s) - corrosion , electrochemistry , aeration , metallurgy , sterilization (economics) , materials science , oxygen , immersion (mathematics) , cast iron , environmental chemistry , chemistry , electrode , mathematics , organic chemistry , economics , pure mathematics , monetary economics , foreign exchange market , foreign exchange
Microbial activity involvement on soil corrosion of old ductile iron was studied through electrochemical tests and microscopic analysis. Immersion test was conducted at room temperature under stagnant conditions during 62 days where sterilization and oxygen parameters were considered. Mechanisms were investigated through DC and AC electrochemical measurements combined to microscopic observation of surface products by SEM. The results showed an accelerated corrosion in the case of aerated biotic condition with evidence of oxygen promoting bacterial activity. However, corrosion inhibition was observed under deareated biotic condition. The results imply clearly the role of burying depth and soil compactness on ductile iron water pipe life time.