Absorption effect of pure nickel on the corrosion behaviors of the GH3535 alloy in tellurium vapor

• 作者: Kai Wang Li Jiang Xiang-Xi Ye Jian-Ping Liang Chao-Wen Li Fang Liu Zhi-Jun Li
• 来源期刊: 核技术（英文版）
• 年，卷（期）: 2021,（12）
• 所属期刊栏目: NUCLEAR CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR MEDICINE
• 页码范围: 77-88
• 页数: 12页
• 语种: 英文

摘要

In this study,pure Ni was demonstrated to pro-tect the GH3535 alloy from Te vapor corrosion because of its strong absorption capacity.Severe Te corrosion of a single GH3535 alloy sample occurred in Te vapor at 700℃,which manifested as complex surface corrosion products and deep intergranular cracks.However,when pure Ni and the GH3535 alloy were put together in the vessel,the GH3535 alloy was completely protected from Te corrosion at the expense of the pure Ni.Thermody-namic calculations proved that the preferential reaction between pure Ni and Te vapor reduced the activity of Te vapor considerably,preventing the corrosion of the GH3535 alloy.Our study reveals one potential approach for protecting the alloys used in molten-salt reactors from Te corrosion.