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Effect of microbial hydrogen consumption on the hydrogen permeation behaviour of AISI 4135 steel under cathodic protection
Affiliation:1. CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;2. University of Chinese Academy of Science, Beijing 100049, China;3. Open Studio for Marine Corrosion and Protection, Pilot National Laboratory for Marine Science and Technology, Qingdao 266237, China;4. Center for Ocean Mega-Science, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao, 266071, China;5. School of Municipal and Environment Engineering, Harbin Institute of Technology, Harbin 150090, China;6. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China;7. Federal Institute for Materials Research and Testing, D-12205, Berlin, Germany;1. School of Mechanical Engineering, University of Jinan, Jinan, 250022, China;2. State Key Laboratory of Advanced Welding and Joining & School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China;3. Department of Mechanical Engineering, Shandong Jiaotong University, Jinan, 250022, China;1. VUB, Pleinlaan 2, 1050 Brussel, Belgium;2. Department of Materials, Textiles and Chemical Engineering, Ghent University (UGent), Technologiepark 46, B-9052, Ghent, Belgium;1. Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, PR China;2. Safetech Research Institute, Beijing, 100083, PR China
Abstract:The feasibility of microbial hydrogen consumption to mitigate the hydrogen embrittlement (HE) under different cathodic potentials was evaluated using the Devanathan-Stachurski electrochemical test and the hydrogen permeation efficiency η. The hydrogen permeation efficiency η in the presence of strain GA-1 was lower than that in sterile medium. The cathodic potential inhibited the adherence of strain GA-1 to AISI 4135 steel surface, thereby reducing the hydrogen consumption of strain GA-1. The adherent GA-1 cells were capable of consuming ‘cathodic hydrogen’ and reducing the proportions of absorbed hydrogen, indicating that it is theoretically possible to control HE by hydrogen-consuming microbes.
Keywords:Low alloy steel  Hydrogen permeation  Cathodic potential  Hydrogen consumption
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