钢筋混凝土构筑物电化学保护的新进展

PROGRESS IN ELECTROCHEMICAL PROTECTION FOR STEEL REINFORCING CONCRETE STRUCTURES

综述了钢筋混凝土构筑物电化学保护的发展和现状 ,包括牺牲阳极系统和外加电流系统 .内容涉及对不同类型、不同龄期构筑物的保护标准、保护参数选择、保护效果的评价以及检测、监测等诸方面 .认为有必要加强电化学驱氯、电化学再碱化等新技术的研究 ;根据构筑物的不同使用环境 ,采用多种有效的、综合的保护措施 .

The electrochemical protection mostly in terms of cathodic protection for steel reinforcing concrete structures aims to restrain or prevent the premature failure or damage of the structure due to corrosion of rebar. The research and development of the protection have been more and more attached great importance to control the corrosion since 1973. In this paper, progress in cathodic protection for concrete structures in the last 25 years is reviewed, and concentrated on practical sections, such as cathodic protection criteria, engineering design, assessment of protection effectiveness, inspection and monitoring of the system both in impressed current method and in sacrificial anode method. Suggestions are that diverse and comprehensive measures for corrosion control should be taken in accordance with the condition of structure situated and new electrochemical techniques to remove chloride from concrete structures and to realkalize the environment at steel/concrete interface which are to be useful protective treatments, particularly, for existing structures should be extensively developed.