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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Heat Treatments on the Electrochemical Behavior of 304L Stainless Steel in Nitric Acid
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Effect of Heat Treatments on the Electrochemical Behavior of 304L Stainless Steel in Nitric Acid

机译：热处理对硝酸304L不锈钢电化学行为的影响

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In this study, the intergranular corrosion behavior of 304L stainless steel (SS) after heating at different temperatures and times was investigated by using the double loop electrochemical potentiokinetic reactivation (DL-EPR), the potentiodynamic polarization electrochemical and the electrochemical impedance spectroscopy (EIS) methods. It was found that there was no significant difference in the potentiodynamic polarization curves of the specimens after different heat treatments. However, the corrosion resistance of specimens could be clearly distinguished by EIS. Between 650 to 750?C, the degree of sensitisation (DOS) had a maximum value and the decrease in Rct was more prominent for the specimens aged at 650 and 750?C. Heat treatments conducted in the range of 650-750?C, even a brief heating time, caused a serious decline in the corrosion resistance of 304L SS. The Rct-values of the specimens aged at 650 and 750?C decreased with the increase of the heating time. However, the ? Rct-values of the specimens aged at 850 C increased with the increase of the heating time.
机译：在本研究中，通过使用双回路电化学潜能再激活（DL-EPR），电位偏振电化学和电化学阻抗光谱（EIS）来研究在不同温度和时间在不同温度和时间进行加热后的304L不锈钢（SS）的晶间腐蚀行为。方法。发现在不同的热处理后标本的电位动力学偏振曲线没有显着差异。然而，标本的耐腐蚀性可以通过EIS清楚地区分。在650至750℃之间，致敏程度（DOS）具有最大值，并且RCT的降低对于650和750℃的标本更突出。在650-750？C的范围内进行的热处理，甚至是短暂的加热时间，导致304L SS的耐腐蚀性的严重下降。随着加热时间的增加，在650和750℃下老化的标本的RCT值降低。然而 ？随着加热时间的增加，850℃下试样的RCT值随着加热时间的增加而增加。

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