摘要
采取扫面电子显微镜(SEM)、能谱分析(EDS)及电化学方法等研究了海水中舟形藻对Q235碳钢腐蚀行为的影响。结果表明:在不含舟形藻的培养液中浸泡后,Q235碳钢表面发生了均匀腐蚀,而在含舟形藻的培养液中浸泡后,Q235碳钢表面发生了严重的局部腐蚀;舟形藻附着在碳钢表面可分泌胞外聚合物(EPS),试验初期生物膜对碳钢有一定的保护作用,舟形藻在碳钢表面进行光合作用,试验后期局部生物膜脱落导致局部溶解氧含量过高,阴极氧还原电流变大,从而加速腐蚀。
Scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS)and electrochemical methods were used to study the effect of navicula on the corrosion behavior of Q235 carbon steel.The results showed that the surface of Q235 carbon steel was uniformly corroded after immersion in the culture solution without navicula,and severe localized corrosion occurred on the surface of Q235 carbon steel after immersion in the culture solution containing navicula.The navicula attaching to the surface of carbon steel could secrete extracellular polymer(EPS).At the beginning of the experiment,the biofilm had a certain protective effect on carbon steel.Photosynthesis was carried out on the surface of carbon steel.The local biofilm detachment caused the localized dissolved oxygen content be too high,the cathodic oxygen reduction current became larger,and thus accelerated corrosion.
作者
林梦晓
张杰
胡秀华
杨东方
侯保荣
LIN Mengxiao;ZHANG Jie;HU Xiuhua;YANG Dongfang;HOU Baorong(Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China;College of Marine Ecology and Environment,Shanghai Ocean University,Shanghai 201306,China;Open Studio for Marine Corrosion and Protection,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China)
出处
《腐蚀与防护》
CAS
北大核心
2019年第1期1-6,42,共7页
Corrosion & Protection
基金
国家自然科学基金项目(41376003
41006054)资助
中国科学院战略性先导科技专项(A类)(XDA13040405)
关键词
Q235碳钢
舟形藻
微生物腐蚀
SEM
电化学
Q235 carbon steel
navicula
microbiological corrosion
SEM
electrochemistry
