高分子缓蚀剂的合成及其在钢筋混凝土中的应用

Synthesis and Application of Polymeric Corrosion Inhibitor for Reinforced Concrete

合成了硫脲二乙烯三胺缩聚物（ＥＴ），用动电位极化曲线及电化学阻抗谱研究其在混凝土孔隙模拟液及混凝土中对钢筋腐蚀的抑制作用．结果表明，这是一种混合型缓蚀剂，对钢筋的点蚀也有较好的抑制作用．在模拟液中添加１％该缓蚀剂就可以使氯子的容忍度从０．０２ｍｏｌ／Ｌ提高到０．１０ｍｏｌ／Ｌ，并与ＮａＮＯ２有较好的协同作用．既能吸附于钢筋表面，还能提高混凝土的密实度，减缓电解质渗透．对于钢筋混凝土的腐蚀防护具有一定的应用前景．

A new polymer E Twas synthesized and used as a corrosion inhibitor for reinforced concrete. The inhibitive behavior and mechanism were studied with linear polarization ,Tafel polarization,EIS and XPS method in simulated pore solution system with concrete samples.The result showed that the polymer was a mixing type inhibitor. A 1% dosage was sufficient to imhibit the corrosion of steel in simulated pore solution system. The salt endurance was enhanced from 0.02 mol/L to 0.10 mol/L.The result also showed the good synergetic effect of NaNO 2,especially in low NaNO 2 concentration.The EIS showed that E_T has dual function on reinforced concrete,i.e.,densifying the concrete pore structure and adsorbing on the surface of the reinforcing rebar.