Influence of Marine Aerobic Biofilms on Corrosion of 316L Stainless Steel  

作　　者：Feng-ling XU Ji-zhou DUAN Cun-guo LIN Bao-rong HOU 

机构地区：[1]State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute [2]Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences

出　　处：《Journal of Iron and Steel Research International》2015年第8期715-720,共6页

基　　金：Sponsored by National Basic Research Program(973 Program)of China(2014CB643304,2014CB643305);National Natural Science Foundation of China(51131008);The Open Fund of Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences(CKF201409)

摘　　要：The influence of marine aerobic biofilms on the corrosion of 316L stainless steel （SS） in aerated and deaerated seawater was studied by electrochemical impedance spectroscopy （EIS）, potentiodynamic polarisation curves, current-potential curves and scanning electron microscopy with energy-dispersive spectroscopy （SEM-EDS）. EIS and SEM-EDS results showed that the aero- bic biofilms inhibited 316L SS corrosion within the test duration. Comparison of results under aerated and deaerated conditions revealed that 02 enhanced the inhibition efficiency of the aerobic biofilms. This result indicated that living cells were necessary for the aerobic biofilms to inhibit the corrosion of 316L SS. Polarization curves indicated that the biofilms mainly inhibited anode ac- tion. Current-potential curves under deaerated conditions showed that electron transfer processes occurred between microorganisms and electrodes. Moreover, 316L SS as an electron acceptor was protected from corrosion.The influence of marine aerobic biofilms on the corrosion of 316L stainless steel （SS） in aerated and deaerated seawater was studied by electrochemical impedance spectroscopy （EIS）, potentiodynamic polarisation curves, current-potential curves and scanning electron microscopy with energy-dispersive spectroscopy （SEM-EDS）. EIS and SEM-EDS results showed that the aero- bic biofilms inhibited 316L SS corrosion within the test duration. Comparison of results under aerated and deaerated conditions revealed that 02 enhanced the inhibition efficiency of the aerobic biofilms. This result indicated that living cells were necessary for the aerobic biofilms to inhibit the corrosion of 316L SS. Polarization curves indicated that the biofilms mainly inhibited anode ac- tion. Current-potential curves under deaerated conditions showed that electron transfer processes occurred between microorganisms and electrodes. Moreover, 316L SS as an electron acceptor was protected from corrosion.

关 键 词：316L stainless steel microbiologically influenced corrosion polarisation curve 

分 类 号：TG172.7[金属学及工艺—金属表面处理] TG142.71[金属学及工艺—金属学]