天然海水中硝酸盐的添加对EH40钢腐蚀的影响  

Impact of Nitrate Addition on EH40 Steel Corrosion in Natural Seawater

作　　者：吴佳佳[1,2] 徐鸣 王鹏 张盾[1,2] WU Jiajia;XU Ming;WANG Peng;ZHANG Dun(CAS Key Laboratory of Marine Environmental Corrosion and Biofouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;Open Studio for Marine Corrosion and Protection,Laoshan Laboratory,Qingdao 266237,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]崂山实验室海洋腐蚀与防护开放工作室,青岛266237

出　　处：《中国腐蚀与防护学报》2023年第4期765-772,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：中国科学院A类先导专项(XDA23050104)。

摘　　要：研究了天然海水中硝酸盐的添加对EH40钢腐蚀的影响。利用失重法、动电位极化曲线、SEM、CLSM、Raman、16S rRNA基因高通量测序等测试方法,表征了EH40钢在添加有不同浓度硝酸盐(0、0.1、1、10、100 mmol/L)的天然海水中浸泡12周的腐蚀速率、腐蚀形貌、腐蚀产物、生物膜形貌、生物膜微生物群落结构等,探讨了硝酸盐添加对EH40钢腐蚀的影响机制。结果表明:天然海水中硝酸盐的添加能够促进EH40钢的腐蚀,且促进作用具有浓度依赖性;同时,硝酸盐添加会加剧EH40钢的局部腐蚀程度。硝酸盐添加对EH40钢腐蚀的影响经由微生物起作用,其会改变生物膜微生物群落结构。The impact of nitrate addition on corrosion of EH40 steel in natural seawater was investigated.The corrosion rate,morphology and products of EH40 steel,as well as the formed biofilm morphology,and microbial communities on the steel immersed in natura seawater with various addition of nitrate(0,0.1,1,10,and 100 mmol/L)for 12 weeks were studied by means of mass loss measurement,potentiodynamic polarization curves,SEM,CLSM,Raman spectroscopy,and examination of high throughput sequencing of 16S rRNA gene.It was found that corrosion of EH40 steel was promoted by nitrate addition,and the promotion degree was dependent on the contents of nitrate added.Meanwhile,localized corrosion was enhanced by nitrate addition.The impact of nitrate addition on the corrosion of EH40 steel is affected by microorganisms,correspondingly,which can change the structure of microbial communities of biofilms.

关 键 词：海水腐蚀 微生物腐蚀 硝酸盐 EH40钢 

分 类 号：TG172[金属学及工艺—金属表面处理]