期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 107, 期 -, 页码 43-51出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2021.07.039
关键词
Microbiologically influenced corrosion; Carbon steel; Sulfate-reducing bacteria; Biofilm; Biocide
资金
- Saudi Aramco
- National Key Research and Development Program of China [2018YFF0215002]
- Key Labo-ratory of Materials Chemistry for Energy Conversion and Storage Ministry of Education
- Foundation of Hubei Key Laboratory of Materials Chemistry and Service Failure
In this study, Tetrakis hydroxymethyl phosphonium sulfate (THPS) was enhanced to mitigate microbiologically influenced corrosion (MIC) of carbon steel. The results showed that the addition of Peptide A can effectively enhance the mitigation effect of THPS at a low dosage.
Tetrakis hydroxymethyl phosphonium sulfate (THPS) was enhanced by a 14-mer Peptide A, with its core 12-mer sequence mimicking part of Equinatoxin II protein, in the mitigation of sulfate reducing Desulfovibrio ferrophilus MIC (microbiologically influenced corrosion) of X80 carbon steel. Results proved that 50 ppm (w/w) THPS was sufficient to mitigate the D. ferrophilus biofilm, and its very agressive MIC (19.7 mg/cm(2) in 7 days or 1.31 mm/a), but not 20 ppm THPS. To achieve effective mitigation at a low dosage of THPS, biofilm-dispersing Peptide A was added to 20 ppm THPS in the culture medium. Sessile cell counts were reduced by 2-log and 4-log after enhancement by 10 ppb and 100 ppb Peptide A, respectively. Enhancement efficiency (further reduction in corrosion rate) reached 69% for 10 ppb Peptide A and 83% for 100 ppb Peptide A compared with 20 ppm THPS alone treatment, indicating that Peptide A was a good biocide enhancer for THPS. (C) 2022 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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