Investigation of C/Al-Cr-N multilayer coatings for stainless steel bipolar plate in polymer electrolyte membrane fuel cells

被引：14

作者：

Wang, Zhiyuan ^{[1
]}

Wang, Yibo ^{[1
]}

Li, Zhuguo ^{[1
,3
]}

Feng, Kai ^{[1
,3
]}

Huang, Jian ^{[1
]}

Lu, Fenggui ^{[1
]}

Yao, Chengwu ^{[1
]}

Cai, Xun ^{[1
,2
]}

Wu, Yixiong ^{[1
,2
,3
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai Key Lab Mat Laser Proc & Modificat, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[3] Academician Expert Off Workstn Jiansheng Pan, Linan, Zhejiang Provin, Peoples R China

来源：

SURFACE & COATINGS TECHNOLOGY | 2014年 / 258卷

基金：

中国国家自然科学基金;

关键词：

Polymer electrolyte membrane fuel cell; Bipolar plates; Surface conductivity; Corrosion resistance; Physical vapor deposition; CORROSION-RESISTANCE; ELECTRICAL-PROPERTIES; TIN; PERFORMANCE; BEHAVIOR; TIALN; CRALN; FILM;

D O I：

10.1016/j.surfcoat.2014.07.028

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To improve the corrosion resistance and surface conductivity of stainless steel bipolar plate, C/Al-Cr-N multilayer coatings with varying Al:Cr target current are deposited on stainless steel 316 L (SS316L) by magnetron sputtering. Scanning electron microscope (SEM) results show that the coating is about 23 mu m in total thickness, consisting of 0.9 mu m carbon layer and 1.4 mu m Al-Cr-N sub-layer. The interfacial contact resistance (ICR) result indicates that the surface resistance decreases with the increasing content of chromium, and achieves the minimum value of 6.17-4.88 m Omega-cm(2) at the compaction force between 120 and 150 N cm(-2) for the Al2Cr4 sample. The electrochemical and inductively coupled plasma atomic emission spectrometry (ICP-AES) results disclose that C/Al-Cr-N multilayer coatings with Cr:N atomic ratio of 1:1 and lower aluminum content have higher chemical inertness and better corrosion resistance. Al6Cr0 and Al5Cr1 samples exhibit more negative corrosion potential and higher passive current density with galvanic corrosion on the surface due to the existence of AlN phase. Therefore, C/Al-Cr-N multilayer coatings with lower aluminum content are preferred for bipolar plate application. Crown Copyright (C) 2014 Published by Elsevier B.V. All rights reserved.

引用

页码：1068 / 1074

页数：7

共 30 条

[1] Performance of a 1 kW-class PEMFC stack using TiN-coated 316 stainless steel bipolar plates [J].