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Effect of coal slurry on the corrosion of coal-mine equipment 被引量:4

Effect of coal slurry on the corrosion of coal-mine equipment
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摘要 The corrosion of coal mine equipment immersed in coal slurry is addressed. The corrosion of low carbon steel samples immersed in coal slurries of different concentrations (80, 130, and 180g/L) prepared from coals of different rank (long-flame coal, meager lean coal, and anthracite) and different granularity (0.25-0.5 ram, 0.074-0.25 mm, and less than 0.074 mm particle size) was studied by the electrochemical method of polarization curve measurement, controlled potential sweeping, and continuous scanning. The results show that the corrosion rate in an anthracite slurry, where the coal has high coalification, is far greater than corrosion in a long-flame or a meager lean coal slurry. Furthermore the corrosion current, polarization current, and corrosion rate of low carbon steel become larger, and the polarizability becomes smaller, as the coal particle size decreases. The same trend is seen as the concentration of the coal slurry increases. The corrosion of coal mine equipment immersed in coal slurry is addressed. The corrosion of low carbon steel samples immersed in coal slurries of different concentrations (80, 130, and 180 g/L) prepared from coals of different rank (long-flame coal, meager lean coal, and anthracite) and different granularity (0.25-0.5 mm, 0.074-0.25 mm, and less than 0.074 mm particle size) was studied by the electrochemical method of polarization curve measurement, controlled potential sweeping, and continuous scanning. The results show that the corrosion rate in an anthracite slurry, where the coal has high coalification, is far greater than corrosion in a long-flame or a meager lean coal slurry. Furthermore the corrosion current, polarization current, and corrosion rate of low carbon steel become larger, and the polarizability becomes smaller, as the coal particle size decreases. The same trend is seen as the concentration of the coal slurry increases.
出处 《Mining Science and Technology》 EI CAS 2011年第3期413-417,共5页 矿业科学技术(英文版)
基金 subsidized by the National Natural Science Foundation of China for Innovative Research Group (No.50921002) the Priority Academic Program Development of Jiangsu Higher Education Institutions
关键词 CoalCorrosion Electrochemistry Coal-mine equipment 煤矿设备 腐蚀问题 煤浆 极化曲线 极化电流 浓度增加 电化学方法 连续扫描
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