| NH4Cl溶液浓度对Incoloy 825合金腐蚀行为的影响 |
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| 引用本文： | 朱敏,袁永锋,叶华徽,陈绍奇,奚俊凯,祝舜丰. NH4Cl溶液浓度对Incoloy 825合金腐蚀行为的影响[J]. 化工学报, 2016, 67(Z2): 255-261. DOI: 10.11949/j.issn.0438-1157.20160652 |
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| 作者姓名： | 朱敏 袁永锋 叶华徽 陈绍奇 奚俊凯 祝舜丰 |
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| 作者单位： | 1. 浙江理工大学机械与自动控制学院, 浙江 杭州 310018;2. 杭州锅炉集团股份有限公司, 浙江 杭州 310021 |
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| 基金项目： | 国家自然科学基金项目（51501164）；浙江理工大学科研启动基金项目（15022014-Y）。 |
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| 摘 要： | 通过电化学阻抗技术、极化曲线和浸泡腐蚀实验对Incoloy 825合金在不同浓度NH4Cl溶液中的腐蚀行为进行了研究。研究结果表明：开路电位随着浓度的升高而负移，腐蚀倾向增大；采用等效电路RS（Q1R1）（QdlRt）对电化学阻抗谱进行拟合，电荷转移电阻Rt随浓度增加而减小，Incoloy 825合金的维钝电流密度和腐蚀速率随浓度的增加而增大；825合金的腐蚀形貌主要为局部腐蚀，点蚀的密集度和大小随浓度的增加而增大；EDS结果表明Cl-参与了电化学反应过程。
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| 关 键 词： | 腐蚀 电化学 界面 Incoloy 825 NH4Cl浓度 |
| 收稿时间： | 2016-05-09 |
| 修稿时间： | 2016-10-10 |
Effect of concentration of NH4Cl solution on corrosion behavior of Incoloy 825 alloy |
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| ZHU Min,YUAN Yongfeng,YE Huahui,CHEN Shaoqi,XI Junkai,ZHU Shunfeng. Effect of concentration of NH4Cl solution on corrosion behavior of Incoloy 825 alloy[J]. Journal of Chemical Industry and Engineering(China), 2016, 67(Z2): 255-261. DOI: 10.11949/j.issn.0438-1157.20160652 |
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| Authors: | ZHU Min YUAN Yongfeng YE Huahui CHEN Shaoqi XI Junkai ZHU Shunfeng |
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| Affiliation: | 1. School of Mechanical Engineering & Automation, Zhejiang Sci-Tech University, Hangzhou 310018, Zhejiang, China;2. Hangzhou Boiler Group Co., LTD, Hangzhou 310021, Zhejiang, China |
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| Abstract: | The corrosion behavior of Incoloy 825 alloy was investigated in the different concentration of NH4Cl solution by electrochemical impedance spectroscopy(EIS),polarization curve measurement and immersion corrosion test.The results show that the open circuit potential shifts negatively with the increase of concentration of NH4Cl solution,i.e.,the corrosion tendency increases.The equivalent circuit of RS(Q1R1)(QdlRt)is used to fit the electrochemical impedance spectra.The EIS result reveals that the charge transfer resistance Rt decreases with the increasing of NH4Cl solution concentration,meanwhile the passive current density and corrosion rate of Incoloy 825 alloy increases.The corrosion morphologies of the alloy are mainly localized corrosion,the intensity and size of pits increase with the increase of solution concentration.The results of EDS show that Cl-involves in the electrochemical reaction process. |
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| Keywords: | corrosion electrochemistry interface Incoloy 825 alloy NH4Cl concentration |
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