质子交换膜燃料电池不锈钢双极板CrMoCN涂层的耐蚀性

潘国庆, 田旭

doi:10.16577/j.issn.1001-1560.2024.0222

材料保护 >

2024 , Vol. 57 >Issue 10: 35 - 44

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0222

研究篇

质子交换膜燃料电池不锈钢双极板CrMoCN涂层的耐蚀性

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¹杭州职业技术学院； ²浙江工业大学材料科学与工程学院

田旭(1995-)，硕士，研究方向为材料表面改性，E-mail: txdawn＠163.com

收稿日期: 2024-02-25

修回日期: 2024-04-27

录用日期: 2024-04-28

网络出版日期: 2024-12-20

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Corrosion Resistance of CrMoCN Coated Stainless Steel Bipolar Plate of Proton Exchange Membrane Fuel Cell

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(1.Hangzhou Vocational ＆ Technical College， Hangzhou 310018， China；
2.College of Materials Science and Engineering， Zhejiang University of Technology， Hangzhou 310014， China)

TIAN Xu (1995-)， Master， Research Focus:Material Surface Modification， E-mail: txdawn＠163.com

Received date: 2024-02-25

Revised date: 2024-04-27

Accepted date: 2024-04-28

Online published: 2024-12-20

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摘要

为了提高316L 不锈钢双极板(SS316L)在质子交换膜燃料电池(PEMFC)中的耐蚀性，采用磁控溅射技术在其表面以不同乙炔气体流速(6，10，14 sccm)制备了一层CrMoCN 涂层。采用XPS、SEM 等对涂层样品的元素成分和表面形貌进行表征，并使用电化学测试方法测试了样品在质子交换膜燃料电池(PEMFC)的正常运行、启动/停止和长期浸泡工况下的耐腐蚀性能。结果表明:CrMoCN 涂层由CrN，Mo2N，MoC 和Cr7C3相和非晶碳组成；在恒电位极化和循环高电位极化测试中，乙炔气体流速14 sccm 制得的CrMoCN-14 涂层均具有最好的耐腐蚀性。在长期浸泡条件下，CrMoCN-14 涂层样品的电荷转移电阻为3.37×105 Ω·cm2，比SS316L 高大约1 个数量级，这意味着CrMoCN-14 涂层具有优异的化学稳定性，能够为SS316L 基材提供稳定的保护。

关键词： 质子交换膜燃料电池; 不锈钢双极板; CrMoCN 涂层; 磁控溅射; 乙炔流速; 耐蚀性

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潘国庆, 田旭 . 质子交换膜燃料电池不锈钢双极板CrMoCN涂层的耐蚀性[J]. 材料保护, 2024 , 57(10) : 35 -44 . DOI: 10.16577/j.issn.1001-1560.2024.0222

Abstract

For improving the corrosion resistance of 316L stainless steel (SS316L) bipolar plate in the proton exchange membrane fuel cell(PEMFC)， the CrMoCN coating was prepared on its surface using magnetron sputtering technology at different acetylene gas flow rates (6，10，14 sccm).The elemental composition and surface morphology of the coating samples were characterized using XPS， SEM， etc.， and the corrosion resistance of the samples under normal operation， start/stop， and long-term immersion conditions of proton exchange membrane fuel cells(PEMFC) was tested using electrochemical testing methods.Results showed that the CrMoCN coating was composed of CrN， Mo2 N， MoC，Cr7C3 phases and amorphous carbon.In both constant potential polarization and cyclic high potential polarization tests， the CrMoCN-14 coating prepared with acetylene gas flow rate of 14 sccm showed the best corrosion resistance.Under the long-term immersion conditions， the charge transfer resistance of the CrMoCN-14 coating sample was 3.37×105 Ω·cm2， which was about one order of magnitude higher than that of SS316L，which suggested that the CrMoCN-14 coating had excellent chemical stability and could provide stable protection for SS316L substrate.

Key words： proton exchange membrane fuel cell; stainless steel bipolar plates; CrMoCN coating; magnetron sputtering; C₂H₂ flow rate; corrosion resistance

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