采用循环极化、U型样法、慢应变速率拉升、金相表征等手段对比研究热处理制度对7150铝合金电化学腐蚀性能和应力腐蚀性能的影响;并从TEM晶界析出相分布、晶界腐蚀形貌、点蚀发生发展机理以及应力腐蚀开裂机制等角度,对电化学参数与应力腐蚀敏感性之间的一致性关系进行理论说明.结果表明:第二点蚀电位((Ψ)pit,2)及其相应电位差值((Ψ)pit,2-(Ψ)corr、(Ψ)pit,2-rep)随时效的变化趋势与耐应力腐蚀能力随时效的变化趋势完全一致.
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