采用失重法(静态旋转挂片法和动态模拟法)与电化学方法(极化曲线和线性极化电阻法)研究了三种常见凝汽器管材(20钢、HSn70-1B黄铜和TP316L不锈钢)在某地表水中的腐蚀情况。结果表明, 该地表水经阻垢缓蚀剂和加酸处理后在4倍浓缩倍率下运行时对TP316L不锈钢、HSn70-1B黄铜的腐速均小于0.005 mm/a的技术标准要求, 动态模拟试验得到的腐蚀速率略低于旋转挂片试验得到的腐蚀速率, 电化学方法得到的腐蚀速率与失重法结果基本一致。

Weight-loss method (rotation specimen method and dynamic simulation method) and electrochemical methods (polarization curves and linear polarization resistance measurement) were employed to evaluate the corrosion of three condenser tube materials (#20 carbon steel, HSn70-1B brass and 316L stainless steel) in surface water. The results indicate that the corrosion rates of HSn70-1B brass and 316L stainless steel were both less than 0.005 mm/a in surface water treated by scale-corrosion inhibitors and acid with concentration ratio of 4. The result of dynamic simulation test was a little less than that of rotation specimen method. The corrosion rates obtained by electrochemiscal methods and mass loss measurement were basically the same.