Influence of Silica Fume on Corrosion Behaviour of Reinforced Steel in Different Media  

作　　者：Z.A.El-Hadi I.Z.Selim 等 

机构地区：[1]DepartmentofChemistry,UniversityCollegeforGirls,AinShamsUniversity,Egypt [2]PhysicalChemistryDepartment,NationalResearchCenter,Cairo,Egypt

出　　处：《Journal of Materials Science & Technology》2002年第1期83-88,共6页材料科学技术（英文版）

摘　　要：Electrochemical and corrosion behaviour of reinforced steel embedded in cement pastes incorporating different amounts of silica fume as a partial replacement of cement has been studied in chloride and sulphate solutions by using different electrochemical techniques. The results indicate that, while steel passivity degree is low in the control samples' upon soaking in the corrosive media, it has been high in samples incorporating silica fume and increased with increasing silica fume content. The improvement effect of silica fume may be attributed to the pore solution structure of the cement paste, which limits the mobility of aggressive ions near the surface of the steel. The mechanism of steel corrosion due to chloride and sulphate attack and passivation effect of silica fume are discussed.

关 键 词：Corrosion Reinforced steel Cement pastes Silica fume Aggressive ions 

分 类 号：TG171[金属学及工艺—金属表面处理] TG142.1[金属学及工艺—金属学]