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The action of micro bio species and some inhibitors on the corrosion of stainless steel
Author(s) -
LahodnyŠarc O.,
Krstulović Lj.,
Kulušić B.,
Sambrailo D.,
Ivić J.
Publication year - 2011
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.200905559
Subject(s) - crevice corrosion , seawater , corrosion , metallurgy , inert , cathodic protection , zinc , oxygen , materials science , chemistry , environmental chemistry , electrochemistry , electrode , organic chemistry , ecology , biology
The influence of local factors on the susceptibility to crevice corrosion of stainless steel in seawater has been investigated with specimens of UNS S31600, 316 L in Adriatic Sea, at the location in Dubrovnik, Croatia. Besides the other factors, as salinity, redox potential, oxygen content, temperature, and pH, bio species present in the seawater can particularly influence the oxygen cathodic reduction reaction and stimulate crevice corrosion process. Specimens with crevice formers were exposed in natural and biological inert seawater. Crevice phenomena were detected by potential versus time measurement and by visual and microscopic observation. In another series of experiments the action of ecological corrosion inhibitors, non‐toxic carboxylic salts, zinc gluconate, and sodium benzoate, has shown the suppression of crevice formation in the seawater.