| 胡杰珍,胡欣,耿保玉,邓培昌,杨靖荣.不锈钢电化学钝化中铈盐的协同作用[J].装备环境工程,2025,22(3):112-119. HU Jiezhen,HU Xin,GENG Baoyu,DENG Peichang,YANG Jingrong.Coordination of Cerium Salts in Electrochemical Passivation of Stainless Steel[J].Equipment Environmental Engineering,2025,22(3):112-119. |
| 不锈钢电化学钝化中铈盐的协同作用 |
| Coordination of Cerium Salts in Electrochemical Passivation of Stainless Steel |
| 投稿时间：2024-10-18 修订日期：2024-11-22 |
| DOI：10.7643/issn.1672-9242.2025.03.013 |
| 中文关键词: 电化学钝化 304不锈钢 硝酸钠 钝化膜 铈盐 耐蚀性中图分类号:TG174 文献标志码:A 文章编号:1672-9242(2025)03-0112-08 |
| 英文关键词:electrochemical passivation 304 stainless steel sodium nitrate passivation films cerium salts corrosion resistance |
| 基金项目:广东省自然科学基金(2021A1515012129) |
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| Author | Institution |
| HU Jiezhen | Key Laboratory of Corrosion and Protection of Ocean Engineering Equipment, Guangdong Ocean University, Guangdong Zhanjiang 524088, China |
| HU Xin | Key Laboratory of Corrosion and Protection of Ocean Engineering Equipment, Guangdong Ocean University, Guangdong Zhanjiang 524088, China |
| GENG Baoyu | Key Laboratory of Corrosion and Protection of Ocean Engineering Equipment, Guangdong Ocean University, Guangdong Zhanjiang 524088, China |
| DENG Peichang | Key Laboratory of Corrosion and Protection of Ocean Engineering Equipment, Guangdong Ocean University, Guangdong Zhanjiang 524088, China |
| YANG Jingrong | Key Laboratory of Corrosion and Protection of Ocean Engineering Equipment, Guangdong Ocean University, Guangdong Zhanjiang 524088, China |
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| 中文摘要: |
| 目的 以传统电化学钝化理论为基础，开发高效、环保304不锈钢电化学钝化方法，研究硝酸铈对304不锈钢电化学钝化膜耐蚀性能的影响。方法 通过在1 mol/L的硝酸钠溶液中分别添加0~20 g/L的硝酸铈，利用恒电位极化，制备带有钝化膜的不锈钢样品。采用开路电位(OCP)、动电位扫描、电化学阻抗(EIS)等电化学方法，结合X射线光电子能谱(XPS)分析研究不同钝化膜的耐蚀性能和钝化膜的组成。结果 当硝酸铈质量浓度为15 g/L时，不锈钢的开路电位达到最大值0.189 V，此时的自腐蚀电位最大，为–0.24 V，自腐蚀电流密度最小，为3.61´10–5 mA/cm2，阻抗值也最大，为2.48´106 Ω.cm2。XPS分析结果表明，加入15 g/L硝酸铈时，不锈钢钝化膜中，Cr的氧化物含量增加，同时也发现了Ce的氧化物的存在。结论 以硝酸钠溶液为电解质溶液，对304不锈钢进行电化学钝化时，向硝酸钠溶液添加适量硝酸铈可以拓宽钝化膜中铬的传输通道，使钝化膜中铬的分布均匀化、钝化膜致密化。 |
| 英文摘要: |
| Based on the traditional electrochemical passivation theory, the work aims to develop an efficient and environment-friendly electrochemical passivation method for 304 stainless steel and study the effect of cerium nitrate on corrosion resistance of electrochemical passivation film of 304 stainless steel. A stainless steel sample with passivation film was prepared through constant potential polarization by adding 0-20 g/L cerium nitrate into 1 mol/L sodium nitrate solution. The corrosion resistance and composition of different passivation films were studied by means of open-circuit potential (OCP), dynamic potential scanning, electrochemical impedance spectroscopy (EIS) and X-ray photoelectron spectroscopy (XPS). When the concentration of cerium nitrate was 15 g/L, the open-circuit potential of stainless steel reached the maximum value of 0.189 V, the self-corrosion potential was up to –0.24 V, the self-corrosion current density dropped to 3.61´10–5 mA/cm2 and the impedance was up to 2.48´106 Ω.cm2. By XPS analysis, when 15 g/L cerium nitrate was added, the oxide content of Cr in passivation film of stainless steel increased, and the oxide of Ce was also found. In the electrochemical passivation of 304 stainless steel with sodium nitrate solution as electrolyte solution, the transport channel of chromium in the passivation film can be widened by adding cerium nitrate to sodium nitrate solution, the distribution of chromium in the passivation film is homogenized and the passivation film is densified. |
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