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钢筋混凝土和预应力混凝土的耐久性历来是人们所关心的问题。无数的使用经验和许多的研究都表明,钢筋腐蚀是影响结构物寿命的不可忽视的因素。本文针对混凝土中钢筋腐蚀的特点,概述了阴极保护的基本原理。通过对钢筋已经受到腐蚀的预应力输水管线阴极保护的论述,以及列举的国外阴极保护在钢筋混凝土中的应用情况,从抑制钢筋腐蚀的阳极过程、增强界面对钢筋的保护作用出发,提出了阴极保护是防止混凝土中钢筋腐蚀的有效方法。
The durability of reinforced concrete and prestressed concrete has always been a concern. Numerous experience and many studies have shown that corrosion of rebar is a non-negligible factor affecting the lifespan of structures. This paper outlines the basic principles of cathodic protection for the characteristics of corrosion of rebar in concrete. Based on the discussion of the cathodic protection of prestressed water pipelines that have been corroded by steel bars and the application of foreign cathodic protection in reinforced concrete, this paper proposes that from the perspective of inhibiting the anodic process of reinforcing bar corrosion and enhancing the protection of the interface against reinforcing steel bar, Cathodic protection is an effective method to prevent corrosion of rebar in concrete.