采用实验室模拟研究的方法,通过腐蚀电化学测试和腐蚀形貌观察,借助表面物相结构和元素成分分析,比较了3种海水淡化所用的HAl77-2铜合金热交换管的耐蚀性以及平均晶粒度,分析了它们在海水介质中的腐蚀失效机制.结果表明:HAl77-2铜合金管的电化学阻抗均随浸泡时间的延长而逐渐增大,在达到极大值后,又会出现在极大值附近波动的现象;相比较而言,1号管样的耐蚀性最好、晶粒度最小,而3号管样的耐蚀性最差、晶粒度最大.
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