中文摘要：

采用荧光显微技术研究了自然海水中微生物在两种钝态金属表面的吸附动力学过程与其开路电位正移之间的关系．高钼钢和1Cr18Ni9Ti电极在海水中浸泡了10d左右，1d后两种钝态金属腐蚀电位正移约200mV．研究发现微生物向钝态金属表面附着的初期对金属的开路电位影响最大，随后腐蚀电位增加缓慢．在吸附过程中微生物在钝态金属表面附着数量随时间增加呈负指数增长．给出了微生物附着的动力学方程，并对其进行了讨论．两种钝态金属开路电位的变化和其表面微生物数量增加有着相似的趋势：开路电位在微生物附着过程中迅速增加。微生物附着达到平衡后钝态金属开路电位增加缓慢．这说明在微生物附着初期对钝态金属电位正移影响最大。随后阶段影响逐渐减弱．

英文摘要：

In seawater the influence of biofilms formation kinetics process on two types of passive metals open circuit potentials （Eocp） were studied. 1Cr18Ni9Ti and high Mo steel coupons were immersed in seawater for about 10 days and Eocp increased for about 200 mV after about 1 day. Epifluorescence microscopy observation and Eocp data showed that during the initial bacteria adsorption period that Eocp changed greatly and in the following time Eocp increased slowly. The bacteria amounts on metal surface increased according to an exponential law and its adsorption kinetics at metal surface was proposed. The ennoblement of Eocp was similar to the bacteria number increasing： Eocp increased quickly during bacteria adsorption process and increased slowly after biofilms had formed.