Effect of multilayer CrN/CrAlN coating on the corrosion and contact resistance behavior of 316L SS bipolar plate for high temperature proton exchange membrane fuel cell

作     者：S.Pugal Mani P.Agilan M.Kalaiarasan K.Ravichandran N.Rajendran Y.Meng S.Pugal Mani;P.Agilan;M.Kalaiarasan;K.Ravichandran;N.Rajendran;Y.Meng

作者机构：Department of Analytical ChemistryUniversity of MadrasChennai-25India Department of ChemistryAnna UniversityChennai-25India State Key Laboratory of TribologyTsinghua UniversityBeijing 100084China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第97卷第2期

页      面：134-146页

核心收录：

学科分类：080503[工学-材料加工工程] 0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：the financial assistance received from Science and Engineering Research Board(SERB PDF/2017/002594) New Delhi India 

主　　题：Bipolar plate 316L SS Corrosion Contact resistance Contact angle Surface roughness 

摘      要：Stainless steels have received wide attention as a substitute material for bipolar plates in high temperature proton exchange membrane fuel cell(HT-PEMFC).In the present work,the CrN,CrAlN and multilayer CrN/CrAlN coatings were deposited on 316 L SS to increase the corrosion resistance and decrease the interfacial contact *** deposited coatings exhibited face centered cubic phase structure and it was verified from the X-ray diffraction pattern.X-ray photo electron spectroscopy results showed the formation of both CrN and CrAlN layers on 316 L ***/CrAlN coating is more helpful in water management due to low surface roughness and high contact angle in the HT-PEMFC *** corrosion resistance behavior of all the samples were studied in 85%H_(3)PO_(4)solution at 140℃purged with H_(2)(HT-PEMFC anode)and O_(2)(HT-PEMFC cathode)*** results showed that all the coatings considerably improved the performance of 316 L SS and superior corrosion resistance was observed for CrN/CrAlN multilayer coating,whose protective efficiency was 98.12%and 96.14%in the two simulated HT-PEMFC *** results of electrochemical impedance spectroscopic studies demonstrated higher impedance for CrN/CrAlN *** morphological studies performed after corrosion studies revealed that protection ability of CrN/CrAlN coating still remained acceptable.A very low interfacial contact resistance value of 6 mΩ cm^(2) at 140 N/cm;was observed for CrN/CrAlN ***,after corrosion studies,the interfacial contact resistance value of CrN/CrAlN coated 316 L was much lower than that of CrN and CrAlN coatings due to the increased oxidation *** maximum power density of about 0.93 W/cm^(2) at 2 A/cm^(2) and output voltage of 0.96 V was observed for CrN/CrAlN coating.