高<strong>Nb</strong>锆合金在含氧蒸汽中耐腐蚀性能恶化的机理

高Nb锆合金在含氧蒸汽中耐腐蚀性能恶化的机理

黄建松, 裴文, 徐诗彤, 白勇, 姚美意, 胡丽娟, 谢耀平, 周邦新

Degradation Mechanism on Corrosion Resistance of High Nb-Containing Zirconium Alloys in Oxygen-Containing Steam

HUANG Jiansong, PEI Wen, XU Shitong, BAI Yong, YAO Meiyi, HU Lijuan, XIE Yaoping, ZHOU Bangxin

表1 合金在400℃、10.3 MPa的DE、300 μg/kg DO和1000 μg/kg DO过热蒸汽中的氧化动力学参数

Table 1 Oxidation kinetic parameters of the alloy corroded in superheated steam with DE, 300 μg/kg DO, and 1000 μg/kg DO at 400^oC and 10.3 MPa

Environment	Transition		Pre-transition		Post-transition
Environment		$t_{0}$ / d	$w_{t_{0}}$ / (mg·dm^-2)	$k_{1}$ / (mg·dm^-2·d $^{- n_{1}}$ )	$n_{1}$	$k_{2}$ / (mg·dm^-2·d $^{- n_{2}}$ )	$n_{2}$
DE	72	57.39	4.78	0.46	1.38	0.86
300 μg·kg^-1 DO	40	48.73	7.58	0.43	1.62	0.88
1000 μg·kg^-1 DO	40	51.84	4.67	0.55	1.73	0.89