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中国腐蚀与防护学报  2016, Vol. 36 Issue (6): 529-534    DOI: 10.11902/1005.4537.2016.161
  研究报告 本期目录 | 过刊浏览 |
环境因素对纯Zn在饱和Zn(OH)2溶液中腐蚀行为的影响II—温度和溶解氧浓度
周开河1,方云辉1,徐孝忠1,江炯1,郭小平2,刘栓2,3,郑文茹3,蒲吉斌2,3(),王立平2,3
1. 国网浙江省电力公司宁波供电公司 宁波 315201
2. 芜湖春风新材料有限公司 芜湖 241000
3. 中国科学院宁波材料技术与工程研究所 中国科学院海洋新材料与应用技术重点实验室浙江省海洋材料与防护技术重点实验室 宁波 315201
Effect of Environmental Factors on Corrosion Behavior of Zn in Saturated Zn(OH)2 Solution II—Temperature and Dissolved Oxygen
Kaihe ZHOU1,Yunhui FANG1,Xiaozhong XU1,Jiong JIANG1,Xiaoping GUO2,Shuan LIU2,3,Wenru ZHEN3,Jibin PU2,3(),Liping WANG2,3
1. State Grid Zhejiang Electric Power Corporation Ningbo Power Supply Company, Ningbo 315201, China
2. Wuhu Spring New Material Co., Ltd, Wuhu 241000, China
3. Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
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摘要: 

研究了纯Zn在模拟大气腐蚀环境 (饱和Zn(OH)2溶液) 中的初期电化学腐蚀机理。利用失重实验,极化曲线和电化学阻抗技术测试溶解氧浓度和温度对纯Zn在饱和Zn(OH)2溶液中电化学腐蚀行为的影响,采用SEM分析腐蚀产物形貌。结果表明:温度是影响纯Zn在饱和Zn(OH)2溶液中腐蚀速控的主要因素,纯Zn在饱和Zn(OH)2溶液中的腐蚀速率随着溶解氧浓度的降低而减小,随着溶液温度的升高而增大。

关键词 纯Zn腐蚀行为温度溶解氧    
Abstract

Effect of temperature and dissolved oxygen concentration on electrochemical corrosion behavior of Zn in saturated Zn(OH)2 solutions, which aims to simulate the initial atmospheric corrosion environment, was investigated by means of weight loss measurement, polarization curves and electrochemical impedance spectroscopy. The corrosion morphology of corrosion products was detected by SEM. The results indicated that solution temperature was the main factor that affected the corrosion rate of Zn in the saturated Zn(OH)2 solution. The corrosion rate of Zn decreased with the decrease of dissolved oxygen concentration, and increased with the increase of temperature in the saturated Zn(OH)2 solution.

Key wordspure zinc    corrosion behavior    temperature    dissolved oxygen contentration
    
基金资助:国家自然科学基金项目 (41506098),中国博士后基金项目和第九批特等资助项目 (2015M580528,2016T90553),浙江省博士后科研项目择优项目 (BSH1502160)和宁波市自然科学基金项目 (2016A610261) 资助

引用本文:

周开河,方云辉,徐孝忠,江炯,郭小平,刘栓,郑文茹,蒲吉斌,王立平. 环境因素对纯Zn在饱和Zn(OH)2溶液中腐蚀行为的影响II—温度和溶解氧浓度[J]. 中国腐蚀与防护学报, 2016, 36(6): 529-534.
Kaihe ZHOU, Yunhui FANG, Xiaozhong XU, Jiong JIANG, Xiaoping GUO, Shuan LIU, Wenru ZHEN, Jibin PU, Liping WANG. Effect of Environmental Factors on Corrosion Behavior of Zn in Saturated Zn(OH)2 Solution II—Temperature and Dissolved Oxygen. Journal of Chinese Society for Corrosion and protection, 2016, 36(6): 529-534.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2016.161      或      https://www.jcscp.org/CN/Y2016/V36/I6/529

图1  饱和Zn(OH)2溶液中模拟不同溶解氧浓度电化学测试装置示意图
图2  纯Zn在不同溶解氧浓度饱和Zn(OH)2溶液中浸泡96 h后的EIS曲线
图3  纯Zn在不同溶解氧浓度饱和Zn(OH)2溶液中浸泡不同时间的等效电路
图4  纯Zn在不同溶解氧浓度饱和Zn(OH)2溶液中的Rf 和Rct变化曲线
图5  纯Zn在不同溶解氧浓度饱和Zn(OH)2溶液中浸泡30 d后的SEM像
图6  纯Zn在不同温度饱和Zn(OH)2溶液中浸泡30 d的失重实验数据
图7  纯Zn在不同温度饱和Zn(OH)2溶液中浸泡168 h的动电位极化曲线
Temperature
Ecorr (vs SCE)
V
Icorr
μAcm-2
bc
mVdec-1
ba
mVdec-1
4 -1.096 2.34 -136.9 55.8
20 -1.064 5.62 -278.1 45.6
35 -1.061 7.03 -274.5 42.9
55 -1.005 18.8 -689.6 36.3
表1  纯Zn在不同温度饱和Zn(OH)2溶液中浸泡168 h后拟合得到的腐蚀参数
图8  纯Zn在不同温度饱和Zn(OH)2溶液中浸泡168 h后的EIS曲线
Temperature / ℃ Rs / Ωcm2 Q1 / μFcm-2 n1 Rf / Ωcm2 Qdl / μFcm-2 n2 Rct / Ωcm2
4 0.01 8.93 0.68 1825 153.2 0.85 6658
20 0.01 9.68 0.75 1756 212.5 0.86 2562
35 0.01 21.3 0.76 685.7 245.6 0.65 2231
55 0.01 56.9 0.52 364.3 321.2 0.69 756.2
表2  纯Zn在不同温度下拟合得到的电化学腐蚀参数
图9  纯Zn在4和35 ℃饱和Zn(OH)2溶液中浸泡30 d后的SEM像
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