1.Introduction Microbiologically influenced corrosion(MIC)is the destruction of metal materials caused by the activity of microorganisms and the participation of biofilms[1].Global economic costs caused by marine corr...1.Introduction Microbiologically influenced corrosion(MIC)is the destruction of metal materials caused by the activity of microorganisms and the participation of biofilms[1].Global economic costs caused by marine corrosion come to hundreds of billion dollars per year,with approximately 20% of corrosion losses caused by MIC[2].The MIC poses a serious threat to the integrity and safety of assets in the oil and gas industry,water industry,and nuclear waste storage facili-ties[3-5].展开更多
A series Co-（18.5–20.7） at.% B melts encompassing the eutectic composition（Co81.5B18.5） were solidified at different degrees of undercooling. It is found that the metastable Co23B6 phase solidifies as a substitut...A series Co-（18.5–20.7） at.% B melts encompassing the eutectic composition（Co81.5B18.5） were solidified at different degrees of undercooling. It is found that the metastable Co23B6 phase solidifies as a substitute for the stable Co3 B phase in the alloy melts undercooled above a critical undercooling value of -60 K.The Co23B6 and α-Co phases make up a metastable eutectic. The corresponding eutectic composition and temperature are Co80.4B19.6 and 1343 K, respectively. On exposure of the metastable Co23B6 phase at a given temperature above 1208 K, it does not decompose even after several hours. But it transforms by a eutectoid reaction to α-Co ＋ Co3 B at lower temperature.展开更多
基金supported by the National Natural Science Foun-dation of China(Nos.52371071,51971228,and 51771212).
文摘1.Introduction Microbiologically influenced corrosion(MIC)is the destruction of metal materials caused by the activity of microorganisms and the participation of biofilms[1].Global economic costs caused by marine corrosion come to hundreds of billion dollars per year,with approximately 20% of corrosion losses caused by MIC[2].The MIC poses a serious threat to the integrity and safety of assets in the oil and gas industry,water industry,and nuclear waste storage facili-ties[3-5].
基金supported by the National Natural Science Foundation of China(Grant Nos.51227001 and 51471108)the SJTU-UNSW Cooperative Research Fund(16X120030005)
文摘A series Co-（18.5–20.7） at.% B melts encompassing the eutectic composition（Co81.5B18.5） were solidified at different degrees of undercooling. It is found that the metastable Co23B6 phase solidifies as a substitute for the stable Co3 B phase in the alloy melts undercooled above a critical undercooling value of -60 K.The Co23B6 and α-Co phases make up a metastable eutectic. The corresponding eutectic composition and temperature are Co80.4B19.6 and 1343 K, respectively. On exposure of the metastable Co23B6 phase at a given temperature above 1208 K, it does not decompose even after several hours. But it transforms by a eutectoid reaction to α-Co ＋ Co3 B at lower temperature.
