Abstract
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 Desul-fovibrio 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/cm2 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.En-hancement 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.
基金项目
China Scholarship Council for studying in the USAJW and HL acknowledge supports by the National Key Research and Development(2018YFF0215002)
Key Labo-ratory of Materials Chemistry for Energy Conversion and Storage Ministry of Education2018()
Foundation of Hubei Key Laboratory of Materials Chemistry and Service Failure2017()
NETL
NSTL
维普
万方数据