[1]郭文明,刘光明*,谢逍原,等.doi: 10.3969/j.issn.1001-3849.2025.10.017316L不锈钢在尿素水解液中的电化学腐蚀行为[J].电镀与精饰,2025,(10):128-134.
　Dong Meng,Zhu Yanbin,Liu Chenhui.Electrochemical corrosion behavior of 316L stainless steel in urea hydrolysis solution Guo Wenming 1, Liu Guangming1*, Xie Xiaoyuan 2, Yang Shuli2,[J].Plating & Finishing,2025,(10):128-134.
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doi: 10.3969/j.issn.1001-3849.2025.10.017316L不锈钢在尿素水解液中的电化学腐蚀行为()

《电镀与精饰》[ISSN:1001-3849/CN:12-1096/TG]

卷:
期数:
2025年10
页码:
128-134
栏目:
出版日期:
2025-10-31

文章信息/Info

Title:
Electrochemical corrosion behavior of 316L stainless steel in urea hydrolysis solution Guo Wenming 1, Liu Guangming1*, Xie Xiaoyuan 2, Yang Shuli2,
作者:
郭文明1; 刘光明1*; 谢逍原2; 杨淑莉2; 董 猛2; 朱炎彬1; 刘晨辉1
(1. 南昌航空大学 轻量化复合材料江西省重点实验室,江西 南昌 330063 ;2. 东方电气集团东方锅炉股份有限公司,四川 自贡 643001)
Author(s):
Dong Meng2;  Zhu Yanbin1;  Liu Chenhui1
(1. Jiangxi Provincial Key Laboratory of Lightweight Composite Materials, Nanchang Hangkong University, Nanchang 330063, China; 2. Dongfang Electric Group Dongfang Boiler Co., Ltd., Zigong 643001, China)
关键词:
不锈钢; 尿素水解液; 腐蚀; 电化学
Keywords:
stainless steel;  urea hydrolysis solution;  corrosion;  electrochemistry
分类号:
TG172
文献标志码:
A
摘要:
采用动电位极化曲线、电化学阻抗谱(EIS)及Mott-Schottky曲线研究了316L不锈钢在室温条件下不同浓度尿素水解液中的腐蚀电化学特征。结果表明：316L不锈钢试样在10 wt.%～30 wt.%浓度尿素水解溶液中的开路电位为负，稳定在–0.26～–0.35 V区间。尿素水解液的浓度在10 wt.%～30 wt.%范围内升高时，316L不锈钢的腐蚀速率减小，但仍保持较好的耐腐蚀性能。在尿素水解液中，316L不锈钢的腐蚀过程受阴极控制，主要发生耗氧腐蚀，其表面存在稳定且致密的钝化膜。316L不锈钢钝化膜具有双层结构，同时具有n型和p型半导体性质，随着尿素浓度逐渐升高，施主密度和受主密度都有所减小。
Abstract:
The electrochemical corrosion characteristics of 316L stainless steel in urea hydrolysis solutions at different concentrations under room temperature conditions were investigated through the use of polarization curves, electrochemical impedance spectroscopy (EIS), and Mott-Schottky analysis. The results indicate that the open circuit potential of the 316L stainless steel samples in 10 wt.% to 30 wt.% urea hydrolysis solution is negative, stabilizing within the range of –0.26 V to –0.35 V. As the concentration of urea hydrolysis solution increases from 10 wt.% to 30 wt.%, the corrosion rate of 316L stainless steel decreases, while still maintains relatively good corrosion resistance. In urea hydrolysis solution, the corrosion process of 316L stainless steel is controlled by the cathodic reaction, primarily occurring through oxygen reduction, and a stable, dense passive film exists on the surface of the stainless steel. At room temperature, the passivation film of 316L stainless steel in urea hydrolysis solution exhibits a bilayer structure with both n-type and p-type semiconductor properties. As the urea concentration increases, both the donor density and the acceptor density decrease

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更新日期/Last Update: 2025-10-17