期刊
CORROSION SCIENCE
卷 220, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2023.111268
关键词
Anaerobic water -line corrosion; Microbiological corrosion; Sulfate reducing bacteria; Sessile bacterial; Galvanic effect
The anaerobic water-line corrosion of 980 high-strength steels in artificial seawater containing SRB was investigated. The specimen suffered serious pitting corrosion in the water-line region, where the corrosion rate was about two times higher than that of under water. A great amount of sessile SRB on the surface of the water-line area induced a continuous gully-shaped pitting on the high-strength steel with an average hole depth of 11 μm/ 14 d. Meanwhile, the different component and structure of SRB biofilms accumulated in water-line and under water regions induced a galvanic effect, which further accelerated the corrosion rate in the liquid-phase coupled region.
The anaerobic water-line corrosion of 980 high-strength steels in artificial seawater containing SRB was inves-tigated. The specimen suffered serious pitting corrosion in the water-line region, where the corrosion rate was about two times higher than that of under water. A great amount of sessile SRB on the surface of the water-line area induced a continuous gully-shaped pitting on the high-strength steel with an average hole depth of 11 mu m/ 14 d. Meanwhile, the different component and structure of SRB biofilms accumulated in water-line and under water regions induced a galvanic effect, which further accelerated the corrosion rate in the liquid-phase coupled region.
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