Microbial corrosion resistance of a novel Cu-bearing pipeline steel
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第12期
论文作者：Xianbo Shi Wei Yan Dake Xu Maocheng Yan Chunguang Yang Yiyin Shan Ke Yang
文章页码：2480 - 2491
摘 要：Microbiologically influenced corrosion（MIC） is becoming a serious problem for buried pipelines. Developing environmentally friendly strategies for MIC control is increasingly urgent in oil/gas pipeline industry.Copper（Cu） in steels can not only provide aging precipitation strengthening, but also kill bacterium,offering a special biofunction to steels. Based on the chemical composition of traditional X80 pipeline steel, two Cu-bearing pipeline steels（1% Cu and 2% Cu） were fabricated in this study. The microstructure,mechanical properties and antibacterial property against sulphate-reducing bacteria（SRB） and Pseudomonas aeruginosa（P. aeruginosa） were studied. It was found that the novel pipeline steel alloyed by 1%Cu exhibited acicular ferrite microstructure with nano-sized Cu-rich precipitates distribution in the matrix, resulting in better mechanical properties than the traditional X80 steel, and showed good MIC resistance as well. The pitting corrosion resistance of 1% Cu steel in as-aged condition was significantly better than that of X80 steel. A possible antibacterial mechanism of the Cu-bearing pipeline steel was proposed.
Xianbo Shi1，Wei Yan1，Dake Xu2，Maocheng Yan1，Chunguang Yang1，Yiyin Shan1，Ke Yang1
1. Institute of Metal Research,Chinese Academy of Sciences2. School of Materials Science and Engineering,Northeastern University
摘 要：Microbiologically influenced corrosion（MIC） is becoming a serious problem for buried pipelines. Developing environmentally friendly strategies for MIC control is increasingly urgent in oil/gas pipeline industry.Copper（Cu） in steels can not only provide aging precipitation strengthening, but also kill bacterium,offering a special biofunction to steels. Based on the chemical composition of traditional X80 pipeline steel, two Cu-bearing pipeline steels（1% Cu and 2% Cu） were fabricated in this study. The microstructure,mechanical properties and antibacterial property against sulphate-reducing bacteria（SRB） and Pseudomonas aeruginosa（P. aeruginosa） were studied. It was found that the novel pipeline steel alloyed by 1%Cu exhibited acicular ferrite microstructure with nano-sized Cu-rich precipitates distribution in the matrix, resulting in better mechanical properties than the traditional X80 steel, and showed good MIC resistance as well. The pitting corrosion resistance of 1% Cu steel in as-aged condition was significantly better than that of X80 steel. A possible antibacterial mechanism of the Cu-bearing pipeline steel was proposed.
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