亚硝酸盐在混凝土结构中的阻锈作用(英文)  

Corrosion Inhibition of Nitrite Salt in Existing Reinforced Concrete Structures

作　　者：柳俊哲[1] 孙武[1] 贺智敏[1] 巴明芳[1] 袁伟静[1] 

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211

出　　处：《硅酸盐学报》2014年第5期607-612,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51078189,51278255)资助项目;宁波市重大科技计划项目(2013C51006)

摘　　要：在钢筋混凝土表面涂刷亚硝酸盐水溶液的条件下,基于Fick第二定律,建立了亚硝酸根离子在混凝土中的迁移模型,并通过测定亚硝酸根离子在混凝土内的渗透浓度验证了该模型的合理性。结果表明:亚硝酸根离子在混凝土中具有良好的迁移能力;亚硝酸根离子的迁移作用使混凝土内钢筋表面的亚硝酸根离子浓度达到抑制钢筋腐蚀的有效摩尔比。依据Magge理论建立亚硝酸根离子的阻锈年限预测模型,并预测亚硝酸根离子保护钢筋的阻锈年限。A diffusion model of nitrite ion in reinforced concrete and a prediction model for inhibition effect in reinforced concrete were proposed according to the Fick second law when nitrite solution is coated on the surface of concrete.The diffusion model was evaluated via the experimental results.Nitrite ions can diffuse from the surface of concrete to the position of reinforce ment,resulting in the protection against corrosion.The duration of the protective of nitrites is predicted by the developed pre diction model based on the Magge equation.

关 键 词：钢筋混凝土 亚硝酸根离子 迁移模型 阻锈年限 

分 类 号：TU522.07[建筑科学—建筑技术科学]