Galvanic corrosion study of carbon steel to arsenic and antimony couples
Galvanic corrosion study of carbon steel to arsenic and antimony couples
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DOI：
10.1016/j.geothermics.2015.07.006
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发表时间：
2015-11
期刊：
影响因子：
3.9
通讯作者：
K. Lichti;M. Ko;L. Wallis
中科院分区：
文献类型：
--
作者：
K. Lichti;M. Ko;L. Wallis
已观察到碳钢在pH调节的地热盐水中经历加速腐蚀。在使用中观察到的损坏机制包括：重金属沉积、局部膜下腐蚀、电偶腐蚀和冲刷腐蚀。本文介绍了在温度高达80 °C的模拟盐水中，用电化学技术研究碳钢对锑和砷的电偶腐蚀性能的进展。结果表明，随着温度的升高，碳钢的电偶腐蚀速率增大。曝气增强了碳钢的电偶腐蚀耦合到锑，与砷观察到相反的效果。砷的不同性能归因于本工作中使用的砷电极在阴极极化和/或快速氧化下的砷化氢生产。
Carbon steel has been observed to experience accelerated corrosion in pH adjusted geothermal brines. The damage mechanisms observed in service have included: heavy metal deposition, localised under-film corrosion, galvanic corrosion and erosion corrosion. This paper describes progress in the study of the corrosion properties of galvanic couples of carbon steel to antimony and to arsenic using electrochemical techniques in simulated brine at temperatures up to 80 °C. The results show galvanic corrosion rates of carbon steel increased as temperature was increased. Aeration gave enhanced galvanic corrosion of carbon steel coupled to antimony, a reverse effect was observed with arsenic. The differing performance of arsenic was attributed to one of arsine production under cathodic polarisation and/or rapid oxidation of the arsenic electrodes used in this work.