石油对杀菌剂THPS耐受条件下微生物腐蚀的影响  

Effect of Petroleum on the Microbiologically Influenced Corrosion under Biocide THPS Resistance

作　　者：石鑫 郭定 张一梦 张瑞永 刘泽山 SHI Xin;GUO Ding;ZHANG Yimeng;ZHANG Ruiyong;LIU Zeshan(Key Laboratory of Advanced Marine Materials,Key Laboratory of Marine Environmental Corrosion and Bio-Fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Marine Corrosion Protection,Guangxi Academy of Sciences,Nanning 530007,China;91286 Unit of People's Liberation Army,Qingdao 266000,China)

机构地区：[1]中国科学院海洋研究所海洋关键材料重点实验室海洋环境腐蚀与生物污损重点实验室,山东青岛266071 [2]中国科学院大学,北京100049 [3]广西科学院海洋腐蚀与防护研究所,广西南宁530007 [4]中国人民解放军91286部队,山东青岛266000

出　　处：《材料保护》2024年第8期38-46,共9页Materials Protection

基　　金：国家自然科学基金项目(42206126);山东省自然科学基金(ZR2021QD099)资助。

摘　　要：杀菌剂是海洋油气开采行业防治微生物腐蚀(Microbiologically influenced corrosion,MIC)的常用方法。然而,杀菌剂可能导致微生物腐蚀行为发生改变,同时石油的存在也会对杀菌剂的使用效果造成一定的影响。通过细胞计数、腐蚀失重、表面分析和电化学分析等方法,研究了石油存在下杀菌剂四羟甲基硫酸磷(Tetrakis(hydroxymethyl)phosphonium sulfate,THPS)对硫酸盐还原菌Desulfobaculum bizertense(简称D.bizertensis)腐蚀行为的影响。结果表明,THPS虽然可以抑制D.bizertensis的生长,但会加剧D.bizertensis对X70管线钢的腐蚀。同时石油的加入,使腐蚀电位进一步升高,表明即便添加了杀菌剂,石油仍会促进D.bizertensis对X70的腐蚀。该结果为海洋含油环境中杀菌剂的合理使用提供了参考。Bactericides are a common method for preventing and controlling microbiologically influenced corrosion(MIC)in the offshore oil and gas extraction industry.However,bactericides may cause changes in the behavior of microbial corrosion,and the presence of petroleum will also have a certain impact on the effectiveness of bactericides.In this work,the effect of tetrakis(hydroxymethyl)phosphonium sulfate(THPS)on the corrosion behavior of biocide sulfate-reducing bacteria(Desulfobaculum bizertense)in the presence of petroleum was studied by cell counting,corrosion weight loss,surface analysis and electrochemical analysis.Results showed that although THPS could inhibit the growth of D.bizertensis,it aggravated the corrosion of D.bizertensis on X70 pipeline steel.Meantime,the addition of petroleum further increased the cor-rosion potential,indicating that even with the addition of bactericides,petroleum still promoted the corrosion of D.bizertensis on X70.The a-bove result provided a reference for the rational use of bactericides in marine oily environments.

关 键 词：微生物腐蚀 THPS X70管线钢 硫酸盐还原菌 石油 

分 类 号：TG172[金属学及工艺—金属表面处理]