脱硫弧菌和溶藻弧菌对船体结构材料907钢海水腐蚀行为的影响研究  

Effect of Desulfovibrio sp. and Vibrio Alginolyticus on Corrosion Behavior of 907 Steel in Seawater

作　　者：陈菊娜 吴佳佳[1] 王鹏[1] 张盾[1] 

机构地区：[1]中国科学院海洋研究所中国科学院海洋环境腐蚀与生物污损重点实验室,青岛266071 [2]中国科学院大学,北京100049 [3]海军航空大学,烟台264001

出　　处：《中国腐蚀与防护学报》2017年第5期402-410,共9页Journal of Chinese Society For Corrosion and Protection

基　　金：国家重点研发计划(2016YFB0300604);国家重点基础研究发展计划(2014CB643304)~~

摘　　要：利用失重法、表面分析方法与电化学方法研究了脱硫弧菌(属于硫酸盐还原菌)和溶藻弧菌单独及共存时对船体结构材料907钢在海水中腐蚀的影响。结果表明,腐蚀速率大小顺序为:混合菌<溶藻弧菌<无菌海水≈脱硫弧菌。O_2的存在及营养物质的匮乏,抑制了脱硫弧菌的存活和繁殖,907钢腐蚀速率在脱硫弧菌中与无菌对照中的相似。相反地,溶藻弧菌在以上环境中可以很好地生存,并且抑制了907钢的腐蚀过程,这与细菌通过消耗O_2进行的代谢增殖活动有关。在混合菌体系(脱硫弧菌和溶藻弧菌)中,907钢的腐蚀过程进一步被抑制,这是由于混合菌体系中形成的致密生物膜对腐蚀的深入发展造成阻碍,腐蚀抑制作用更加明显。The corrosion behavior of 907 steel,as hull structural material,in seawater with mono-,and di-cultures of Desulfovibrio sp.（belonging to sulphate-reducing bacteria） and Vibrio alginolyticus was studied by means of weight loss-and electrochemical-method,as well as surface analysis methods.The results demonstrated that the corrosion rate of the steel in seawaters can be ranked increasingly as the following： Desulfovibrio sp.＋ Vibrio alginolyticusVibrio alginolyticusabiotic blank≈Desulfovibrio sp.The metabolism of Desulfovibrio sp.was inhibited due to the lack of nutrient substances and the presence of oxygen,and the corrosion rate of 907 steel in the seawater with Desulfovibrio sp.was the same as that in sterile seawater.However,Vibrio alginolyticus metabilited well in the test condition,and the presence of Vibrio alginolyticus may inhibit the corrosion of 907 steel due to that the oxygen was removed by metalism of Vibrio alginolyticus.The corrosion of 907 steel was further inhibited in the presence of mixed Desulfovibrio sp.and Vibrio alginolyticus,which may facilitate the formation of compact biofilm on the surface of 907 steel.

关 键 词：船体结构材料 微生物腐蚀 脱硫弧菌 溶藻弧菌 

分 类 号：TG172.7[金属学及工艺—金属表面处理]