鼠李糖脂与2,2-二溴-3-次氮基丙酰胺协同抑制X80管线钢的微生物腐蚀  

Synergistic Inhibition of Rhamnolipid and 2,2-dibromo-3-hypoazopropionamide on Microbiologically Influenced Corrosion of X80 Pipeline Steel

作　　者：王娅利 管方[1,3,4] 段继周 张丽娜[1] 杨政险[3] 侯保荣 WANG Yali;GUAN Fang;DUAN Jizhou;ZHANG Lina;YANG Zhengxian;HOU Baorong(Key laboratory of Marine Environmental Corrosion and Biofouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;University of Chinese Academy of Science,Beijing 100049,China;College of Civil Engineering,Fuzhou University,Fuzhou 350108,China;Guangxi Key Laboratory of Marine Environmental Science,Guangxi Academy of Marine Sciences,Guangxi Academy of Sciences,Nanning 530007,China)

机构地区：[1]中国科学院海洋研究所海洋环境腐蚀与生物污损重点实验室,青岛266071 [2]中国科学院大学,北京100049 [3]福州大学土木工程学院,福州350108 [4]广西科学院广西海洋科学院广西近海海洋环境科学重点实验室,南宁530007

出　　处：《中国腐蚀与防护学报》2024年第6期1412-1422,共11页Journal of Chinese Society For Corrosion and Protection

基　　金：福建省海洋经济发展专项(FJHJF-L-2022-19);广西自然科学基金(2023GXNSFBA026252);山东省自然科学基金面上基金(ZR2023MD024);国家自然科学基金(42476209)。

摘　　要：研究了2,2-二溴-3-次氮基丙酰胺(DBNPA)与鼠李糖脂(RL)对X80管线钢在硫酸盐还原菌Desulfovibrio bizertensis SY-1中的腐蚀行为影响。结果表明,Desulfovibrio bizertensis SY-1存在时,X80管线钢的腐蚀失重和点蚀深度明显增加,且表面检测出FeS腐蚀产物。DBNPA的添加,抑制了浮游及固着SRB的生长,减缓了X80管线钢的腐蚀。150 mg/L DBNPA与500 mg/L RL进行复配时,X80管线钢的腐蚀速率与SRB体系相比降低了77.8%(p=0.009),与单独使用300 mg/L DBNPA相比降低了50%。另外,150 mg/L DBNPA与500 mg/L RL复配时,X80管线钢腐蚀浸泡15 d后的腐蚀电流密度与SRB体系相比降低了84.7%,与单独使用300 mg/L DBNPA的SRB体系相比降低了20.5%,可显著抑制X80管线钢的微生物腐蚀。The synergistic effect of 2,2-dibromo-3-hypoazopropionamide(DBNPA)and rhamnolipid(RL)on the corrosion behavior of X80 pipeline steel in solutions containing sulfate reducing bacteria(SRB)Desulfovibrio bizertensis SY-1 was investigated.The results showed that compared with a sterile solution,the mass loss and pitting depth of X80 pipeline steel significantly increased in the presence of Desulfovibrio bizertensis SY-1,while corrosion product FeS was detected on steel surface.However,the addition of DBNPA effectively inhibited the growth of planktonic and sessile bacterial cells,thereby retarding the corrosion process on X80 pipeline steel.Notably,when 150 mg/L DBNPA and 500 mg/L RL were co-added in the solution,the corrosion rate of X80 pipeline steel decreased by 77.8%compared to that in the SRB(p=0.009)containing solution,whilst,by 50%compared to that in the SRB containing solution with addition of 300 mg/L DBNPA alone.Furthermore,this combination also led to an approximately 84.7%reduction in corrosion current density even after 15 days'immersion compared to that in the SRB containing solution,and about 20.5%reduction compared to that in the SRB containing solution with addition of 300 mg/L DBNPA alone.Therefore,these findings found that the cooperative addition of 150 mg/L DBNPA and 500 mg/L RL can effectively inhibit the corrosion of X80 pipeline steel induced by Desulfovibrio bizertensis SY-1.The results may provide references for selecting and utilizing biocides.

关 键 词：硫酸盐还原菌 微生物腐蚀 2 2-二溴-3-次氮基丙酰胺 鼠李糖脂 X80管线钢 

分 类 号：TG174[金属学及工艺—金属表面处理]