LD-2复合缓蚀剂对海水介质混凝土中钢筋阻锈作用研究  

Study on the Anticorrosion of LD-2 Compound Inhibitor on Reinforcing Steel in Seawater

作　　者：杜荣归[1] 王周成[1] 黄若双[1] 胡融刚[1] 赵冰[1] 谭建光[1] 林昌健[1] 

机构地区：[1]厦门大学化学系材料科学与工程系,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：《电化学》2001年第4期494-500,共7页Journal of Electrochemistry

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

摘　　要：利用电化学检测技术和海水浸泡试验等方法 ,观测和研究了经筛选研制的LD_2复合缓蚀剂对海水介质中钢筋腐蚀电化学行为的影响 ,考察和评价了复合缓蚀剂对钢筋的阻锈作用 .结果表明 ,LD_2复合缓蚀剂主要起阳极型缓蚀剂作用 .在海水中加入 2 5 g·L- 1复合缓蚀剂后 ,钢筋的腐蚀电位提高约 0 .2 2 0V ,腐蚀电流降低至未加缓蚀剂的 1% ,缓蚀效率达 99% .钢筋混凝土试样在海水中浸泡 2年 ,表明混凝土中加入占水泥重量 1.0 %～ 2 .5 %LD_2复合缓蚀剂时 。The effect of LD_2 compound inhibitor developed in our laboratory on its anticorrosion action on the reinforcing steel in concrete immersed in seawater was shown in this paper. The corrosion behavior of the reinforcing steel in seawater was studied using electrochemical techniques and immersion tests. The polarization curve of the reinforcing steel immersed in seawater showed the free corrosion potential of the steel increased by 0.220 V (vs. SCE), and the corrosion current decreased by two orders of magnitude by adding 25 g·L -1 compound inhibitor to the seawater. The potentiodynamic anodic polarization curve of reinforcing steel in the seawater with compound inhibitor exhibited a passive range and the breakdown potential of the steel increased by 0.900 V as against in the seawater without inhibitor. Being immersed in the seawater over 24 months, the surface of the reinforcing steel in concrete with LD_2 compound inhibitor content of 1.0%-1.5% of the cement mass was intact, while pitting corrosion occurred on the surface of the steel in concrete without inhibitor for 6 months. LD_2 compound inhibitor is an effective corrosion inhibitor for steel in concrete in seawater and in those environments contained chloride ions for the above experimental results.

关 键 词：钢筋混凝土 腐蚀 海水 缓蚀剂 钢筋 防腐 阻锈作用 

分 类 号：TG172[金属学及工艺—金属表面处理]