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 

机构地区：[1]Department of Chemical and Biomolecular Engineering,Institute for Corrosion and Multiphase Technology,Ohio University,Athens,OH 45701,USA [2]School of Chemistry and Chemical Engineering,Huazhong University of Science and Technology,Wuhan 430074,China [3]Research and Development Center,Saudi Arabian Oil Company,Dhahran 31311,Saudi Arabia

出　　处：《Journal of Materials Science & Technology》2022年第12期43-51,共9页材料科学技术（英文版）

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)。

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.

关 键 词：Microbiologically influenced corrosion Carbon steel Sulfate-reducing bacteria BIOFILM BIOCIDE 

分 类 号：TG174.4[金属学及工艺—金属表面处理]