崔红兵,田世艳,张茂彩,王誉,辛博.低温恒电流氮化提高316L不锈钢导电及耐腐蚀性能[J].表面技术,2022,51(4):365-374.
CUI Hong-bing,TIAN Shi-yan,ZHANG Mao-cai,WANG Yu,XIN Bo.Improvement of Electrical Conductivity and Corrosion Resistance of 316L Stainless Steel by Low Temperature Constant Current Nitriding[J].Surface Technology,2022,51(4):365-374 |
| 低温恒电流氮化提高316L不锈钢导电及耐腐蚀性能 |
| Improvement of Electrical Conductivity and Corrosion Resistance of 316L Stainless Steel by Low Temperature Constant Current Nitriding |
| 投稿时间：2021-05-24 修订日期：2020-08-02 |
| DOI：10.16490/j.cnki.issn.1001-3660.2022.04.039 |
| 中文关键词: 奥氏体不锈钢 双极板 氮化 电化学处理 界面接触电阻 PEMFC |
| 英文关键词:austenitic stainless steel bipolar plates nitridation electrochemical treatment interfacial contact resistance(ICR) PEMFC |
| 基金项目:白云鄂博稀土资源研究与综合利用国家重点实验室自主项目(2020Z2135) |
|
|
| Author | Institution |
| CUI Hong-bing | Baotou Research Institute of Rare Earths, State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou, Inner Mongolia Baotou 014030, China |
| TIAN Shi-yan | CNNC North Nuclear Fuel Element Co., Ltd., Inner Mongolia Baotou 014030, China |
| ZHANG Mao-cai | Baotou Research Institute of Rare Earths, State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou, Inner Mongolia Baotou 014030, China |
| WANG Yu | Baotou Research Institute of Rare Earths, State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou, Inner Mongolia Baotou 014030, China |
| XIN Bo | Baotou Research Institute of Rare Earths, State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou, Inner Mongolia Baotou 014030, China |
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 解决恒电位电化学氮化时高的过电位引起的析氢反应对316LSS综合性能的恶化，提出采用恒电流技术对其进行电化学氮化改性，并确定最佳的试验参数。方法 借助于循环伏安、计时电位，交流阻抗和动电位极化等电化学方法，扫描电镜及X射线光电子能谱分析，研究还原电流密度对316LSS表面形貌、耐腐蚀性能、疏水性能和接触电阻等的影响。结果 还原电流密度为5 mA/cm2时，反应后表面形成的氮掺杂凸起结构呈现明显的疏水性能，最大疏水角为103.7°。140 N/cm2的压紧力下，界面接触电阻为8.9 mΩ.cm2，在0.5 mol/L H2SO4+5 mg/L F–的测试电解质中，腐蚀电流密度为0.025 μA/cm2。同一极板在阴、阳极总共长达13 h的耐久性测试中，腐蚀电流密度均小于1 μA/cm2，且腐蚀后表面只出现了少量的腐蚀坑。结论 316LSS在0.5 mol/L KNO3+0.1 mol/L HNO3的混合溶液中，经恒电流氮化改性后，综合性能明显提高。恒电流电化学改性过程中，316LSS钝化膜中氧化铁膜层的选择性溶解和氧化铬被氮掺杂，两者共同作用提高了316LSS的稳定性和电导率。证明了恒电流电化学氮化改性316LSS双极板可以达到比恒电位更好的效果，这为低成本、长寿命的金属双极板开发提供了新的可选方案。 |
| 英文摘要: |
| This paper aims to solve the deterioration of the performance of 316LSS caused by hydrogen evolution reaction during constant potential electrochemical nitriding, and proppose the galvanostatic electrohemical technology. The effects of reduction current density on the surface morphology, corrosion resistance, hydrophobicity and interfacial contact resistance of 316LSS were studied by cyclic voltammetry (CV), chronopotentiometry, electrochemical impedance spectra (EIS), potentiodynamic polarization, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). When the reduction current density was 5 mA/cm2, the nitrogen-doped 316LSS showed hydrophobic property and the maximum hydrophobic angle was 103.7°, and the interface contact resistance was 8.9 mΩ.cm2 at 140 N/cm2, and the corrosion current density was 0.025 μA/cm2 in 0.5 mol/L H2SO4 and 5 mg/L F– test electrolyte. The corrosion current density of the same plate was less than 1 μA/cm2 in the durability test of cathode and anode for a total of 13 hours, and there were only a few corrosion pits after corrosion. The properties of 316LSS are obviously improved after being modified by nitriding in the mixed solution of 0.5 mol/L KNO3 and 0.1 mol/L HNO3. In the process of galvanostatic electrochemical modification, the selective dissolution of iron oxide film and the doping of chromium oxide by nitrogen improve the stability and conductivity of 316LSS. This work sheds new light on the development of 316LSS bipolar plate with low cost and long service life. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
渝公网安备 50010702501715号