Memory effect and recoverability of passive film degradation of Alloy 800 in simulated crevice chemistry

作者：Fan Hongqiang; Xia Dahai; Behnamian Yashar; Yang Lixia; Luo Jing Li^*; Pandey Mahesh D; Lu Yucheng; Klimas Stan

来源：Nuclear Engineering and Design, 2014, 280: 57-61.

DOI：10.1016/j.nucengdes.2014.08.033

The degradation process of Alloy 800 under simulated steam generator (SG) secondary-side crevice-chemistry conditions containing chloride and thiosulphate was investigated. The SG chemical excursions were simulated by applying a series of square wave potential, followed by various periods of recovery. The results indicated that the damage to the passive film on Alloy 800 tubing material, caused by the excursions, was cumulative if the recovery time was no more than 900 s. The damage to the passive film of Alloy 800 was recoverable if the chemical excursions were shorter than a threshold value even after initiation of pitting/localized corrosion.

• 出版日期2014-12