Mitigation of sulfate reducing Desulfovibrio ferrophilus microbiologically influenced corrosion of X80 using THPS biocide enhanced by Peptide A

作     者：Junlei Wang Hongfang Liu Magdy El-Said Mohamed Mazen A.Saleh Tingyue Gu Junlei Wang;Hongfang Liu;Magdy El-Said Mohamed;Mazen A.Saleh;Tingyue Gu

作者机构：Department of Chemical and Biomolecular EngineeringInstitute for Corrosion and Multiphase TechnologyOhio UniversityAthensOH 45701USA School of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China Research and Development CenterSaudi Arabian Oil CompanyDhahran 31311Saudi Arabia 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第107卷第12期

页      面：43-51页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financial support from Saudi Aramco the China Scholarship Council for studying in the USA supports by the National Key Research and Development Program of China (No. 2018YFF0215002) Key Laboratory of Materials Chemistry for Energy Conversion and Storage Ministry of Education (2018) The Foundation of Hubei Key Laboratory of Materials Chemistry and Service Failure (2017) 

主　　题：Microbiologically influenced corrosion Carbon steel Sulfate-reducing bacteria Biofilm Biocide 

摘      要：Tetrakis hydroxymethyl phosphonium sulfate(THPS) was enhanced by a 14-mer Peptide A, with its core12-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 that50 ppm(w/w) THPS was sufficient to mitigate the D. ferrophilus biofilm, and its very agressive MIC(19.7mg/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% for100 ppb Peptide A compared with 20 ppm THPS alone treatment, indicating that Peptide A was a good biocide enhancer for THPS.