锆合金表面耐腐蚀涂层研究现状

Research Status of Corrosion Resistant Coating on Zirconium Alloy Surface

在核工业反应堆中,锆合金核燃料棒包壳管在各种工业介质中服役。介质中包括的氧、水蒸气、二氧化硫、硫化氢、气相金属氧化物、熔盐等会诱发或加剧燃料棒包壳管腐蚀氧化,而温度通常更进一步加速热腐蚀及高温氧化过程。为了防止锆合金表面氧化且不改变或降低其力学性能,在锆基表面制备一层具有耐高温腐蚀和氧化的涂层。文中综述了国内外锆合金表面涂层研究现状,讨论了热障涂层、MCrAlY包覆涂层、铝化物涂层对锆合金高温氧化及热腐蚀性能的影响。

In nuclear reactors,zirconium alloy nuclear fuel rod cladding tubes are used in a variety of industrial media.Medium oxygen,water vapor,sulfur dioxide,hydrogen sulfide,gas metal oxides,molten salt,etc.will induce or aggravate the corrosion of fuel rod cladding tube oxidation,and the temperature will further accelerate the hot corrosion and high temperature oxidation process.To prevent oxidation of the zirconium alloy surface without changing or decreasing its mechanical properties,a high-temperature corrosion resistance coating is prepared on the zirconium-based surface.This paper reviews the research status of zirconium alloy surface coating at home and abroad,and discusses the effects of thermal barrier coating,MCrAlY coating and aluminide coating on the oxidation and hot corrosion properties of zirconium alloy at high temperature.