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核电站蒸汽发生器传热管用Inconel合金在高温高压水中的腐蚀行为研究

DOI: 10.11903/1002.6495.2014.279, PP. 19-24

Keywords: 高温高压水,蒸汽发生器传热管,因科镍合金,腐蚀行为

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Abstract:

研究了核电站蒸汽发生器传热管用合金材料在模拟压水堆一回路水环境中形成的腐蚀氧化膜,首次获得了原位振动光谱。Inconel600合金的拉曼谱中存在3个峰,540和610cm-1拉曼峰源自于表面生成的Cr2O3氧化膜,670cm-1峰对应于表面生成的FeCr2O4尖晶石产物,随着电位的增加,670cm-1峰的相对强度显著增强。Inconel690合金的表面氧化膜由Cr2O3构成,不含NiO或尖晶石成份。Inconel600合金发生应力腐蚀开裂(SCC)的敏感性与其表面氧化膜的变化存在关联性。Inconel690合金尚未发现SCC现象,这与其表面生成的稳定的氧化膜有关。

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