时效制度对ZL114A合金腐蚀性能的影响  

Influence of Aging Treatments on Corrosion of ZL114A Alloy

作　　者：何国强[1] 郑进城[1] 李卫超[1] 邹勇志[2] 曾建民[1,2] 

机构地区：[1]广西大学有色金属材料及其加工新技术教育部重点实验室,广西南宁530004 [2]西北工业大学凝固技术国家重点实验室,陕西西安710072

出　　处：《腐蚀与防护》2009年第1期50-52,共3页Corrosion & Protection

基　　金：广西科技厅项目(桂科工0322009-4)

摘　　要：采用电化学试验和浸泡腐蚀试验研究了不同时效处理的ZL114A合金在3.5%NaCl溶液中的腐蚀行为。利用光学显微镜和扫描电镜对各合金浸泡腐蚀后的形貌进行了观察与分析,并从组织上解释了时效对ZL114A合金腐蚀性能影响的原因。对经固溶(ST)、欠时效(UA)、峰时效(PA)和过时效(OA)处理后ZL114A合金腐蚀性能的分析研究结果表明,固溶状态下合金具有最佳的耐蚀性,E_(corr)和I_(corr)最小,峰时效状态下合金的耐点蚀和晶间腐蚀性最差,E_(corr)和I_(corr)最大。The effects of aging treatment conditions on corrosion behavior of ZL114A alloy in 3.5%NaCl solution were studied by immersion corrosion tests and electrochemical tests. The morphology of alloy samples after immersion corrosion was analyzed by OM （optical microscopy） and SEM （scanning electron microscopy）. The difference in microstructure could lead to variation of corrosion properties. The corrosion properties of ZL114A alloy after the solution treatment （ST） , under-aging （UA） , peak aging （PA） and over-aging （OA） were analyzed respectively. The results showed that corrosion properties under the condition of PA were the worst and under the condition of ST were the best, The Ecorr and Icorr under the condition of PA were thehighest and under the condition of ST were the lowest.

关 键 词：ZL114A合金 时效 电化学 耐蚀性 

分 类 号：TG172[金属学及工艺—金属表面处理]