Corrosion propagation of steel reinforcement in pre-cracked mortar attacked by seawater using wire beam electrode. (November 2022)

• Record Type: Journal Article
• Authors: Feng, Guangyan; Jin, Zuquan; Zhu, Deju; Xiong, Chuansheng; Li, Zhe; Wang, Xiaoxian
• Is Part Of: Corrosion science. Volume 208(2022)
• Publication Date: 2022-11
• Subjects: Corrosion -- Crack -- Wire beam electrode (WBE) -- Concrete -- Chloride; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2022.110655
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract: A novel custom-designed wire beam electrode (WBE) covered by uncracked and cracked mortar was applied to study the corrosion propagation behavior of steel reinforcement. The results showed that WBE technique can effectively monitor passivation and pitting corrosion, especially for the propagation of corrosion. Mortar with a 0.1 mm crack could facilitate the initial corrosion of steel, and a 0.3 mm crack would enhance corrosion tendency dramatically, reaching a corrosion current density of 0.76 μA/cm 2 after 300 d of seawater wetting-drying cycles. The corrosion propagation of wire electrodes is mainly determined by chloride distribution, which changes with increasing crack width. Highlights: A novel custom-designed wire beam electrode (WBE) covered by uncracked mortar and mortar with cracks measuring 0.1 mm~0.3 mm was applied. The whole process of passivation and pitting corrosion, especially for the propagation behavior of corrosion were monitored by WBE technique. The corrosion phase of steel reinforcement influenced by mortar with different crack width was discussed.