Mingyang Wang , Guangxin Liu , Jungan Jiang , Aiying Chen , Zhiyi Ding , Xiaogui Wang , Yong Liu
{"title":"燃料电池模拟环境下选择性激光熔化不锈钢表面机械轧制强化腐蚀研究","authors":"Mingyang Wang , Guangxin Liu , Jungan Jiang , Aiying Chen , Zhiyi Ding , Xiaogui Wang , Yong Liu","doi":"10.1016/j.apsusc.2024.162112","DOIUrl":null,"url":null,"abstract":"<div><div>Additively manufactured stainless steel (SS) exhibits many special advantages in the design and fabrication of bipolar plate (BP), which is a key component in hydrogen fuel cells. However, corrosion performance of the printed sample is a challenge. In this work, austenitic SS printed by selective laser melting (SLM) is modified by surface mechanical rolling treatment (SMRT) to enhance the corrosion resistance, making it more suitable for harsh environments of fuel cells. The microstructure of the SLM samples after SMRT is composed of refined grains with nanotwins and stacking faults. In electrochemical tests simulating the operating environments of fuel cell, the corrosion potentials of SLM samples deliver − 240 and − 220 mV in anode and cathode environments through potentiodynamic polarization tests, while those of the SMRTed samples are 17 and 23 mV, respectively. Contact angle and interface contact resistance tests of the SMRTed samples indicate a good hydrophobicity and electrical conductivity. The corrosive products after potentiostatic polarization tests are determined by X-ray photoelectron spectroscopy (XPS), showing that the passivation film of SMRTed sample contains more Cr<sub>2</sub>O<sub>3</sub> than that of SLM sample. The nanotwinned structure produced by SMRT promotes the formation of a thicker passivation film to effectively slow down the corrosion.</div></div>","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"685 ","pages":"Article 162112"},"PeriodicalIF":6.9000,"publicationDate":"2024-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Corrosion enhancement of selective laser melted stainless steel by surface mechanical rolling treatment in fuel cell simulated environment\",\"authors\":\"Mingyang Wang , Guangxin Liu , Jungan Jiang , Aiying Chen , Zhiyi Ding , Xiaogui Wang , Yong Liu\",\"doi\":\"10.1016/j.apsusc.2024.162112\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Additively manufactured stainless steel (SS) exhibits many special advantages in the design and fabrication of bipolar plate (BP), which is a key component in hydrogen fuel cells. However, corrosion performance of the printed sample is a challenge. In this work, austenitic SS printed by selective laser melting (SLM) is modified by surface mechanical rolling treatment (SMRT) to enhance the corrosion resistance, making it more suitable for harsh environments of fuel cells. The microstructure of the SLM samples after SMRT is composed of refined grains with nanotwins and stacking faults. In electrochemical tests simulating the operating environments of fuel cell, the corrosion potentials of SLM samples deliver − 240 and − 220 mV in anode and cathode environments through potentiodynamic polarization tests, while those of the SMRTed samples are 17 and 23 mV, respectively. Contact angle and interface contact resistance tests of the SMRTed samples indicate a good hydrophobicity and electrical conductivity. The corrosive products after potentiostatic polarization tests are determined by X-ray photoelectron spectroscopy (XPS), showing that the passivation film of SMRTed sample contains more Cr<sub>2</sub>O<sub>3</sub> than that of SLM sample. The nanotwinned structure produced by SMRT promotes the formation of a thicker passivation film to effectively slow down the corrosion.</div></div>\",\"PeriodicalId\":247,\"journal\":{\"name\":\"Applied Surface Science\",\"volume\":\"685 \",\"pages\":\"Article 162112\"},\"PeriodicalIF\":6.9000,\"publicationDate\":\"2024-12-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Surface Science\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0169433224028289\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Surface Science","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0169433224028289","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Corrosion enhancement of selective laser melted stainless steel by surface mechanical rolling treatment in fuel cell simulated environment
Additively manufactured stainless steel (SS) exhibits many special advantages in the design and fabrication of bipolar plate (BP), which is a key component in hydrogen fuel cells. However, corrosion performance of the printed sample is a challenge. In this work, austenitic SS printed by selective laser melting (SLM) is modified by surface mechanical rolling treatment (SMRT) to enhance the corrosion resistance, making it more suitable for harsh environments of fuel cells. The microstructure of the SLM samples after SMRT is composed of refined grains with nanotwins and stacking faults. In electrochemical tests simulating the operating environments of fuel cell, the corrosion potentials of SLM samples deliver − 240 and − 220 mV in anode and cathode environments through potentiodynamic polarization tests, while those of the SMRTed samples are 17 and 23 mV, respectively. Contact angle and interface contact resistance tests of the SMRTed samples indicate a good hydrophobicity and electrical conductivity. The corrosive products after potentiostatic polarization tests are determined by X-ray photoelectron spectroscopy (XPS), showing that the passivation film of SMRTed sample contains more Cr2O3 than that of SLM sample. The nanotwinned structure produced by SMRT promotes the formation of a thicker passivation film to effectively slow down the corrosion.
期刊介绍:
Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.