Naturally effective inhibition of microbial corrosion by bacterium-alga symbiosis on 304 stainless steel

An environment-friendly corrosion inhibition method based on natural bacteria-alga symbiosis was proposed for stainless steel in this study. The symbiotic organisms could be adhered spontaneously on a stainless steel in the marine environment. Results showed that with the addition of the sessile alg...

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Bibliographic Details
Published inJournal of cleaner production Vol. 356; p. 131823
Main Authors Dong, Yuqiao, Song, Guang-Ling, Zheng, Dajiang
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.07.2022
Subjects
Algae
Bio-corrosion inhibition
Natural symbiosis
Stainless steel
Natural symbiosis
Bio-corrosion inhibition
Algae
Stainless steel
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Summary:An environment-friendly corrosion inhibition method based on natural bacteria-alga symbiosis was proposed for stainless steel in this study. The symbiotic organisms could be adhered spontaneously on a stainless steel in the marine environment. Results showed that with the addition of the sessile algal biofilm of Phaeodactylum tricornutum, the corrosion rate of 304 stainless steel was reduced by 97.7% compared with that with only bacterium Bacillus altitudinis. This could be caused by the oxygen produced by the photosynthesis of the algae biofilm, which effectively enhanced the stability of the passive film, reduced the oxygen concentration difference under the biofilm and outside the biofilm, and thus relieved the micro-galvanic corrosion attack. Meanwhile, aided by the alga, an intelligent self-repairing corrosion product layer of iron phosphate could be preferentially deposited over the pit after pitting was initiated, which would further suppress the bio-corrosion damage and synergistically protect the 304 SS. [Display omitted]
ISSN:0959-6526
1879-1786
DOI:10.1016/j.jclepro.2022.131823