复合电位电偶腐蚀控制技术

Control Technology on Galvanic Corrosion of Compound Potential

对复合电位电偶腐蚀控制技术的原理及技术特点进行介绍,阐述了该项发明的用途,并通过消除和减缓电偶腐蚀的两个应用实例,说明了其应用方法和应用效果。该技术是一项针对异种金属之间电偶腐蚀的防腐蚀新技术,其基本原理是通过在电偶阴极上连接复合阳极使其极化形成复合电位,降低电偶阴极的电位,从而减小或消除其与电偶阳极的电位差,来实现对电偶腐蚀的控制,解决了其他防腐蚀技术难以解决的因耐蚀金属材料应用引起的电偶腐蚀问题。该技术有别于阴极保护思路,针对电位差这一电偶腐蚀源进行腐蚀控制,丰富了电化学保护方法内容。实际应用结果表明,该技术不仅为异种金属之间电偶腐蚀控制提供了解决措施,也为材料电化学匹配提供了一种等电位平衡的设计思路。

This paper introduced the principle and technical characteristics of galvanic corrosion control technology of compound potential, expounded the two actual cases of eliminating and retarding galvanic corrosion control, and illumi-nated the uses of this invention. The compound potential galvanic corrosion control technology is a new anticorrosion technology aimed at galvanic corrosion between dissimilar metals. The technology lets cathode form compound potential by connecting compound anode and imposing anodic current on cathode, to be polarized for lowering its potential, to control galvanic corrosion, through the way that reduces or eliminates the potential difference between metals, so as to solve the problem of galvanic corrosion due to corrosion-resistant metal application that cannot or is difficult to be solved by conventional ways . This technology is different from cathode protection. Its corrosion control is carried out according to the galvanic corrosion source of potential difference. The content of electrochemical protection method is enriched. Practical application results show that the technology not only is the way of controlling galvanic corrosion between dis-similar metals, but also provides a design method of equal potential balance for electrochemical matching of metal mate-rials.