【作者】 程立国；

【导师】 张胜寒；

【作者基本信息】 华北电力大学（河北） ， 环境科学， 2008， 硕士

【摘要】 研究了中水回用于火力发电厂作循环冷却水时,水中氨氮组分对循环冷却系统腐蚀的影响。采用A3钢和304不锈钢作为实验试样,通过失重法和动电位连续扫描法对A3钢试样和304钢试样分别在以下四个条件进行腐蚀试验:(1)2～70mg/L氨氮溶液;(2)30～45℃氨氮溶液;(3)pH值7.0～9.0氨氮溶液;(4)添加2～20mg/L MK-300缓蚀阻垢剂的氨氮溶液。结果表明,A3钢试样和304钢试样的腐蚀速度随氨氮溶液浓度增加和溶液温度升高逐渐增大、随氨氮溶液pH值升高逐渐减小、随缓蚀剂浓度增加先迅速减小,后略有上升;腐蚀电位随上述条件变化也发生变化。更多还原

【Abstract】 Studied the influence of ammonia nitrogen in reclaimed water on the corrosion of circulating cooling system when reclaimed water was reused as circulating cooling water in fossil fuel power plants.The test sample are A3 steel and 304 stainless steel.Two methods are adopted,one is weight loss method,the other is potentiodynamic continuous scanning method.The experimental conditions include,(1)2～70mg/L ammonia nitrogen solution,(2)30～45℃ammonia nitrogen solution,(3)pH7.0～pH9.0 ammonia nitrogen solution,(4)including 2～20mg/L MK-300 corrosion and scale inhibitor ammonia nitrogen solution. The experiment outcomes indicate that corrosion speed of A3 sample and 304 sample increase along with the increase of concentration of ammonia nitrogen solution and the rise of the temperature of ammonia nitrogen solution,and decrease along with the rise of pH value of ammonia nitrogen solution,and at first decrease rapidly along with the increase of corrosion and scale inhibitor concentration and then increase.slightly. Corrosion potential also change along with these conditions.更多还原