达克罗涂层的腐蚀动力学行为研究  

Investigation on corrosion kinetics behavior of dacromet coating

作　　者：何建波[1] 鲁道荣[1] 李学良[1] 何百林 

机构地区：[1]合肥工业大学化工学院,安徽合肥230009 [2]深圳科技工业园,广东深圳518057

出　　处：《化学研究与应用》2002年第1期81-83,共3页Chemical Research and Application

基　　金：安徽省自然科学基金资助项目 ( 985 335 40 )

摘　　要：The corrosion kinetics behavior of Dacromet coating was studied by potentiodynamic scan,galvanostatic charge and fast triangular voltage methods.The corrosion kinetics parameters were calculated and the semiconductor conductivity of the coating was investigated.The superior anticorrosive effect of the coating can be attributed to the multilayer inactivation that greatly increases the breakthrough potential and prolongs the breakdown time.On the other hand,the conductivity of the coating could allow the metal powder within the coating displaying sacrificial protection effect at the expense of anade controllably for steel substrate in salt water environments.The coating formed by substituting boric acid for a part of chromic anhydride in the coating solution,contained more charge carriers and showed more negative corrosion potential,so that the coating still effectively displayd such protection effect even in fresh water.The corrosion kinetics behavior of Dacromet coating was studied by potentiodynamic scan,galvanostatic charge and fast triangular voltage methods.The corrosion kinetics parameters were calculated and the semiconductor conductivity of the coating was investigated.The superior anticorrosive effect of the coating can be attributed to the multilayer inactivation that greatly increases the breakthrough potential and prolongs the breakdown time.On the other hand,the conductivity of the coating could allow the metal powder within the coating displaying sacrificial protection effect at the expense of anade controllably for steel substrate in salt water environments.The coating formed by substituting boric acid for a part of chromic anhydride in the coating solution,contained more charge carriers and showed more negative corrosion potential,so that the coating still effectively displayd such protection effect even in fresh water.

关 键 词：腐蚀 达克罗涂层 极化曲线 空间电荷电容 动力学行为 金属材料 表面处理 防腐 电化学 

分 类 号：TG174.44[金属学及工艺—金属表面处理] O646.5[金属学及工艺—金属学]