Effect of plasma nitriding on behavior of austenitic stainless steel 304L bipolar plate in proton exchange membrane fuel cell |
| |
Authors: | R.J. Tian J.C. SunL. Wang |
| |
Affiliation: | Institute of Materials and Technology, Dalian Maritime University, Dalian 116026, PR China |
| |
Abstract: | A dense and supersaturated nitrogen layer with higher conductivity is obtained on the surface of austenitic stainless steel 304L by the low temperature plasma nitriding. The effect of plasma nitriding on the corrosion behavior and interfacial contact resistance (ICR) for the austenitic stainless steel 304L was investigated in 0.05 M H2SO4 + 2 ppm F− simulating proton exchange membrane fuel cell (PEMFC) environment using electrochemical and electric resistance measurements. The experiment results show that the stable passive film is formed after the potentiostatic polarization at the specified anodic or cathodic potentials under PEMFC operation condition, and the plasma nitriding improves slightly the corrosion resistance and decreases markedly the ICR of 304L. The ICR of the plasma nitrided 304L increases after the potentiostatic polarizations for 4 h, and lower than 100 mΩ cm2 at the compaction force of 150 N cm−2. |
| |
Keywords: | Plasma nitriding Austenitic stainless steel Bipolar plate Passive film ICR |
本文献已被 ScienceDirect 等数据库收录! |