Influence of Aging Treatments on Corrosion of ZL114A Alloy

The effects of aging treatment conditions on corrosion behavior of ZL114A alloy in 3.5%NaC1 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 the highest and under the condition of ST were the lowest.