若干无机缓蚀剂对混凝土中钢筋的阻锈作用  

The Effects of Some Inorganic Corrosion Inhibitors on Reinforcing Steel in Concrete

作　　者：杜荣归[1] 胡融刚[1] 胡仁[1] 冯祖德[1] 黄若双[1] 谭建光[1] 林昌健[1] 

机构地区：[1]厦门大学化学系,材料系,物理化学研究所,固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2001年第4期908-913,共6页Journal of Xiamen University：Natural Science

基　　金：国家自然科学基金 (5 98710 4 3);福建省自然科学基金 (E9910 0 0 4 )资助项目

摘　　要：通过含 Na Cl介质溶液的浸泡实验 ,利用电化学检测技术 ,观测和比较了 Na NO2 等 8种无机缓蚀剂添加于混凝土中对钢筋的阻锈作用 .结果表明 ,在本实验条件下 ,Na NO2 等缓蚀剂对钢筋有明显的阻锈作用 .在 p H=9.5 0 ,含 10 %Na Cl的混凝土模拟液中 ,外加 Na NO2 后 ,混凝土中钢筋的腐蚀电位正移 ,腐蚀电流可下降至未加缓蚀剂的 1/ 6 .The effects of different inorganic corrosion inhibitors including sodium nitrite etc. on the reinforcing steel in concrete immersed in simulated concrete solution with 10% NaCl and pH 9.50 were studied by electrochemical technique. The results show that NaNO 2 and the other inhibitors have a various effect on the reinforcing steel in anticorrosion respectively under the experimental condition. For the reinforcing steel in concrete, the free corrosion potential increased by 250 mV, and the corrosion currents decreased by 5 times by adding 2.4% sodium nitrite to the concrete immersed in simulated concrete solution with 10% NaCl and pH 9.50. The performance of reinforcement in anti pitting corrosion was improved in different degree by adding the different inhibitors in concrete immersed in the above mentioned solutions for one year.

关 键 词：钢筋混凝土 腐蚀 缓蚀剂 无机缓蚀剂 阻锈作用 

分 类 号：TU375[建筑科学—结构工程] TG174.42[金属学及工艺—金属表面处理]