Study on Corrosion of Alloy 800 in PWR Primary Water
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摘要: 用320℃含600 mg/kg硼和2 mg/kg锂的高氧含量水溶液模拟PWR一回路水质,研究了800合金在一回路水中的腐蚀特性。结果表明,800合金试样在被侵蚀1500 h之后,表面生成一层很薄的氧化膜,去除氧化膜后,计算出其均匀腐蚀速率为4.03×10-4 mm/a,基体中TiN缺陷处容易引起点蚀,管状试样内环出现明显的晶间腐蚀现象。Abstract: The corrosion behavior of Alloy 800 was investigated in the high-oxygen solution containing 600 mg/kg boron and 2 mg/kg lithium for 1500 h at 320℃.The results showed that the general corrosion rate of Alloy 800 after 1500 h was 4.03×10-4 mm/a,and the oxide film layer was very thin.The TiN precipitates in the matrix could result in pitting.Intergranular attack could be found in the inner side of the tubular specimens after exposure for 1500 h.
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