Erosion-corrosion of carbon and low alloy steels by water at 300°C
Erosion-corrosion of carbon and low alloy steels by water at 300°C
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300°C 水对碳钢和低合金钢的侵蚀腐蚀
DOI：
10.1179/000705987798271839
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发表时间：
1987
期刊：
影响因子：
--
通讯作者：
C. Ashmore
中科院分区：
文献类型：
--
作者：
L. Tomlinson;C. Ashmore
对用于控制300°C下通过蒸发器单元中单个管的水流的套圈的检查表明，在这些条件下，碳钢可以经历高速率的侵蚀-腐蚀（高达3mm/年）。由此得出结论，如此高的侵蚀腐蚀速率是由于钢中铬含量极低和表面可溶性铁的传质系数非常高。对于碳和低合金钢中铬含量高达2.3%的钢，其抗侵蚀能力似乎与钢中的铬含量成正比。氧化层中没有任何钼或铜的富集表明，这些元素的存在不太可能增强对流入水的侵蚀腐蚀的抵抗力。提出了一个简单的水动力模型来解释观察到的表面状况和卡箍内侵蚀-腐蚀速率的变化。
Examination of ferrules used to control the flow of water at 300°C through individual tubes in an evaporator unit has shown that carbon steels can undergo high rates of erosion–corrosion (up to 3mm/year) under these conditions. It is concluded that such high rates of erosion–corrosion are due to the exceptionally low level of chromium in the steel and a very high mass transfer coefficientfor soluble iron at the surface. For levels of chromium up to 2·3% in carbon and low alloy steels, resistance to erosion–corrosion appears to be directly proportional to the level of chromium in the steel. The absence of any enrichment of molybdenum or copper in the oxide layer indicates that the presence of these elements is unlikely to enhance resistance to erosion–corrosion inflowing water. A simple hydrodynamic model is proposed to account for observed variations in surface condition and rate of erosion–corrosion within the ferrules.