Knowledge Network Node
Materials Protection. 2018, (11) Core

Bactericidal Enhancement Mechanism of D-Tyrosine on the Q235B Steel in Medium with Sulfate-Reducing BacteriaChinese Full Text

XU Cong-min;ZHANG Xuan;FENG Jie;LUO Li-hui;ZHAO Miao-miao;TIAN Yong-qiang;School of Materials Science and Engineering,Xi’an Shiyou University;Bohai Petroleum Equipment New Century Machinery Manufacturing Co.,Ltd.;

Abstract: The corrosion behaviors of Q235B steel in medium containing sulfate-reducing bacteria（SRB）without bactericide or with 100 mg/L THPS and 50 mg/L THPS+1 mg/L D-tyrosine were evaluated by weight loss method,extinction dilution method,surface analysis and electrochemical measurement,respectively.The enhancement effect of D-tyrosine on bactericide and inhibitory effect mechanism on microbiological corrosion were discussed.Results showed that D-tyrosine could suppress the formation of microbiological films and promote the disintegration of mature film.D-tyrosine accompanied with THPS could inhibit the occurrence of microbiological corrosion and present significant bactericidal effect,and the bactericidal rate was up to 99%,higher than that of single THPS.During corrosion time of 7 days,the overall trend of the polarization resistance decreased,and the corrosion rate increased gradually under the first two conditions.Under the condition of adding D-tyrosine,the overall trend of the polarization resistance gradually increased,and the corrosion rate decreased gradually.At the corrosion time of 1,3,7 d respectively,the order of corresponding polarization resistance was 50 mg/L THPS+1 mg/L D-tyrosine＞100 mg/L THPS＞without THPS.In addition,all of corrosion products under the three kinds of concentration ratios were Fe7S8,Fe1-xS and Fe SO3·3H2O.In conclusion,D-tyrosine had an obvious bactericidal enhancement effect,which could inhibit microbial corrosion,avoiding environmental pollution caused by excessive use of bactericide.As a new green sterilization technology,it provided theoretical basis and practical technical support for the treatment of microbial corrosion in later water system.
Keywords：

microbiological corrosion; D-tyrosine; sulfate-reducing bacteria（SRB）; bactericide; bactericidal enhancement effect;

  • DOI：

    10.16577/j.cnki.42-1215/tb.2018.11.002

  • Series：

  • Subject：

  • Classification Code：

    TG172

Download the mobile appuse the app to scan this coderead the article.

Tips: Please download CAJViewer to view CAJ format full text.

Download: 231 Page: 6-11 Pagecount: 6 Size: 1624K

Related Literature
  • Similar Article
  • Reader Recommendation
  • Associated Author