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首页> 外文期刊>Journal of Materials Science >BEHAVIOUR OF HASTELLOY C22 STEEL IN SULPHATE SOLUTIONS AT PH 3 AND LOW TEMPERATURES
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BEHAVIOUR OF HASTELLOY C22 STEEL IN SULPHATE SOLUTIONS AT PH 3 AND LOW TEMPERATURES

机译：H3溶液在低温和低温下在硫酸盐溶液中的行为

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The behaviour of Hastelloy C22 steel (N06022 UNS) in solutions at pH 3 and different temperatures, for radioactive water reprocessing plants was studied. The corrosion potentia I was found to increase with temperature. In the neighbourhood of the active-passive potentials, Hastelloy steel was corroded by means of a transient form. In addition, the potentials of the active and transpassive peaks shifted towards more negative values with increasing temperature. The transpassive peak increased with temperature and its potential shifted towards smaller values. The temperature increase led to a reduction of the passive region and a higher current in the passivity. As shown by current instabilities during the backward scan and a higher current than those in the forward transpassivity scan, all of the oxide layer could not be destroyed at the breakdown transpassive potentials. From electrochemical impedance spectroscopy (EIS), apparently the thickness of the passive oxide decreased with temperature in the prepassive region. In passivity, the EIS showed an enhancement of corrosion for higher potentials or temperatures. At the passivity-transpassivity limit potentials, an inductive loop may be the result of adsorption. It was found that the diameter of the capacitive semi-circle and the inductive loop decreased when the temperature increased, indicating an enhancement of corrosion and a decrease in adsorption. The number of active sites and oxidation rate were determined at different potentials. [References: 44]
机译：研究了Hastelloy C22钢（N06022 UNS）在pH 3和不同温度下的溶液中对放射性水后处理厂的行为。发现腐蚀电位I随温度增加。在主动-被动电位附近，哈氏合金钢被瞬态形式腐蚀。另外，随着温度的升高，有源峰和无源峰的电位都向负值移动。穿透峰随温度升高而增加，其电势向较小的值移动。温度的升高导致无源区域的减少和无源电流的增加。如向后扫描期间的电流不稳定性和比正向通过钝化扫描中的电流更高的电流所示，在击穿横向无源电势下不会破坏所有的氧化物层。从电化学阻抗谱（EIS），显然，钝化氧化物的厚度随预钝化区域中的温度而降低。在被动性方面，EIS表现出对更高电位或更高温度的腐蚀增强。在被动-穿越被动极限电位下，感应回路可能是吸附的结果。已经发现，随着温度的升高，电容性半圆和感应回路的直径减小，这表明腐蚀增强并且吸附降低。在不同电位下确定活性部位的数目和氧化速率。 [参考：44]

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