316L不锈钢在海洋深水环境中的局部腐蚀规律
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  • 英文篇名:Localized Corrosion Law of 316L Stainless Steel in Deep Seawater
  • 作者:刘殿宇 ; 王毛毛 ; 张亮 ; 李大朋 ; 常炜 ; 王修云 ; 王润 ; 张雷
  • 英文作者:LIU Dian-yu;WANG Mao-mao;ZHANG Liang;LI Da-peng;CHANG Wei;WANG Xiu-yun;WANG Run;ZHANG Lei;Baiyun Natural Gas Operations of CCLS;Anko Engineering Technology Institute Limited Company;CNOOC Information Technology Co., Ltd.Beijing Branch;CNOOC Research Institute Ltd.;University of Science and Technology Beijing Institute for Advanced Materials and Technology;
  • 关键词:316L不锈钢 ; 海洋深水环境 ; 生物膜 ; 点腐蚀
  • 英文关键词:316L stainless steel;;deep-sea water;;marine microorganism;;pitting corrosion
  • 中文刊名:JSCX
  • 英文刊名:Equipment Environmental Engineering
  • 机构:中海油(深圳)有限公司白云天然气作业公司;安科工程技术研究院(北京)有限公司;中海油信息科技有限公司北京分公司;中海油研究总院有限公司;北京科技大学新材料技术研究院;
  • 出版日期:2019-01-25
  • 出版单位:装备环境工程
  • 年:2019
  • 期:v.16
  • 语种:中文;
  • 页:JSCX201901022
  • 页数:5
  • CN:01
  • ISSN:50-1170/X
  • 分类号:112-116
摘要
目的研究316L不锈钢在海洋深水环境中的局部腐蚀规律。方法利用自行设计的实验装置在南海170 m水深位置开展316L不锈钢腐蚀模拟实验,并通过电化学测试方法与扫描电子显微镜(SEM)、能谱仪(EDS)等测试手段进行分析。结果浸泡7天时,316L不锈钢表面发生局部腐蚀,但微生物吸附会形成保护性的微生物膜,引起其自腐蚀及击穿电位正移,耐点蚀性能会升高。随着浸泡时间的延长,溶解氧含量逐渐降低,试样表面吸附的微生物膜性质发生变化,导致钝化膜在微生物与Cl-的作用下破裂,自腐蚀电位及击穿电位负移,耐点蚀性能下降。结论 316L不锈钢在海洋深水环境中的耐点蚀性能随着浸泡时间的延长,先降低而后增加。
        Objective To study the localized corrosion law of 316 L stainless steel in deep-sea water. Methods The experiment was carried out to study the corrosion law of 316 L stainless steel with the self-developing experimental provision in 170 m water depth, together with cyclic polarization curves, SEM and EDS. Results Pitting corrosion occurred for 316 L stainless steel after 7 days of immersion. But protective microbial film would form for adsorption of microorganism. It would lead to self-corrosion and positive shift of breakdown potential. The pitting resistance might increase. As the immersing time increased, the content of oxygen dissolved decreased, the property of microbial film on the sample surface changed. The passive film broke under the action of microorganism and Cl-. The self-corrosion and breakdown potential shifted negatively. The pitting corrosion resistance decreased. Conclusion The corrosion resistance of 316 L stainless steel decreased and then increased with the increase of immersion.
引文
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