采用腐蚀失重法、电化学测试和慢应变速率拉伸应力腐蚀研究了国产825合金在HCl、NaOH和NaCl溶液中的腐蚀行为,并采用金相显微镜和扫描电镜(SEM)对腐蚀后的样品进行观察.结果表明,国产825合金在HCl溶液中浸泡7d后发生了明显的腐蚀,腐蚀速率随HCl浓度的增加而增大,而在NaOH和NaCl溶液中浸泡5个月后未发生明显腐蚀,并且在HCl、NaOH和NaCl溶液中合金的腐蚀电流随溶液浓度增加而增大.慢应变速率拉伸应力腐蚀结果表明在HCl、NaOH和NaCl溶液中合金的应力腐蚀敏感性很小,因此,一般情况下不会发生应力腐蚀开裂.
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