Location
University of Jinan, Jinan City, Shandong, China
Event Website
http://icdcs2022.ujn.edu.cn/index.htm
Keywords
end effect; galvanostatic method; electromagnetic numerical simulation; cathode; corrosive medium
Abstract
The galvanostatic method is a commonly used accelerated corrosion method in studying the durability of concrete structures caused by steel corrosion. If this method is not adequately controlled, the ends of steel bars will be corroded seriously (this phenomenon is called end effect), which is not common in natural corrosion. How to effectively control the end effect during electrified corrosion is helpful to make the characteristics of electrified corrosion more similar to that of natural corrosion. In this paper, experimental and electromagnetic numerical simulation methods are used to study the influence of cathode and corrosion medium coverage area along the longitudinal direction on the end effect of steel bar before producing corrosion crack. The results showed that the wider the coverage area of the corrosive medium (NaCl solution with a mass concentration of 3%), the longer the corrosion area of reinforcement along the longitudinal direction, the more prone the end effect is. The change of cathode length has no noticeable effect on the corrosion area of reinforcement along the longitudinal direction when the corrosion medium coverage area is constant. Increasing the distance between the end of the corrosion medium coverage area and the end of the reinforcement can effectively avoid the end effect.
Included in
End effect of corroded steel bar in concrete specimen during corrosion test by galvanostatic method
University of Jinan, Jinan City, Shandong, China
The galvanostatic method is a commonly used accelerated corrosion method in studying the durability of concrete structures caused by steel corrosion. If this method is not adequately controlled, the ends of steel bars will be corroded seriously (this phenomenon is called end effect), which is not common in natural corrosion. How to effectively control the end effect during electrified corrosion is helpful to make the characteristics of electrified corrosion more similar to that of natural corrosion. In this paper, experimental and electromagnetic numerical simulation methods are used to study the influence of cathode and corrosion medium coverage area along the longitudinal direction on the end effect of steel bar before producing corrosion crack. The results showed that the wider the coverage area of the corrosive medium (NaCl solution with a mass concentration of 3%), the longer the corrosion area of reinforcement along the longitudinal direction, the more prone the end effect is. The change of cathode length has no noticeable effect on the corrosion area of reinforcement along the longitudinal direction when the corrosion medium coverage area is constant. Increasing the distance between the end of the corrosion medium coverage area and the end of the reinforcement can effectively avoid the end effect.
https://docs.lib.purdue.edu/icdcs/2022/partiv/5
