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Corrosion release behavior of alloy 690 and its application in high-temperature water with Zn injection

Jiapeng Liao|Yousen Hu|Jinggang Li|Desheng Jin|Shuqi Meng|Tianming Ruan|Yisong Hu|Ziyu Zhang
한국원자력학회 (Korean Nuclear Society)|2022.03|Nuclear Engineering and Technology|제54권 제3호|pp. 984-990|DOI https://doi.org/10.1016/j.net.2021.09.009

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참고문헌

키워드

Zn-injectionNickel-based alloyHigh-temperature waterCorrosion release
주제분류원자력공학

초록

Corrosion release behavior of Alloy 690 in high-temperature water was investigated under the conditionsof injected Zn concentrations of 0 ppb, 10 ppb and 50 ppb. A protective oxide film composed of Zn(FexCr1-x)2O4 and Cr2O3 was formed with Zn injection, resulting in a better corrosion resistance. In comparisonwith the Zn-free condition, the corrosion release rate under the Zn-injection conditions was smaller. Thecorrosion release inhibiting factors were 1.7 and 1.9 under the conditions of 10 ppb and 50 ppb Zninjectionrespectively. A foreseen application of the corrosion and corrosion release rates has beenproposed and discussed.

Abstract

Corrosion release behavior of Alloy 690 in high-temperature water was investigated under the conditionsof injected Zn concentrations of 0 ppb, 10 ppb and 50 ppb. A protective oxide film composed of Zn(FexCr1-x)2O4 and Cr2O3 was formed with Zn injection, resulting in a better corrosion resistance. In comparisonwith the Zn-free condition, the corrosion release rate under the Zn-injection conditions was smaller. Thecorrosion release inhibiting factors were 1.7 and 1.9 under the conditions of 10 ppb and 50 ppb Zninjectionrespectively. A foreseen application of the corrosion and corrosion release rates has beenproposed and discussed.

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