Marine field test for steel reinforcement embedded in mortar: Coupled influence of the environmental conditions on corrosion. (September 2020)

• Record Type: Journal Article
• Authors: Tian, Yuwan; Wen, Cheng; Wang, Gui; Hu, Jiezhen; Mai, Zijie
• Is Part Of: Marine structures. Volume 73(2020)
• Publication Date: 2020-09
• Subjects: Temperature -- Humidity -- Salinity -- Coupling effect -- Corrosion damage; Naval architecture -- Periodicals; Offshore structures -- Periodicals; Architecture navale -- Périodiques; Structures offshore -- Périodiques; Naval architecture; Offshore structures; Periodicals; 620.4162
• DOI: 10.1016/j.marstruc.2020.102788
• Languages: English
• ISSNs: 0951-8339

Abstract

Abstract: This paper studied the environmental conditions and corrosion behaviour of mortar samples at two different marine tidal zones and investigated the correlation among the environmental conditions, corrosion rates, and corrosion products. From the experimental results, the concrete structure damage is a function of numerous correlated factors such as the temperature, humidity, and corrosion products. The chloride penetration rate increased by 15% when the humidity increased by 10% and temperature increased 4 °C. Chloride content is the main factor intensifying the reinforcement corrosion. Although the high temperature, humidity, and chloride concentration aggravate the early corrosion of reinforcement, the role of resultant corrosion products shows more important in the developing stage of corrosion damage. The resultant corrosion products affect further corrosion persistence in a complex way, because in some cases, corrosion products-caused cracks will promote corrosion, while in others, corrosion is reduced by sealing the pores with products. Highlights: Concrete structure damage is a function of numerous correlated environmental factors. Chloride content is the main factor intensifying the reinforcement corrosion. High humidity and temperature increase chloride penetration rate. Corrosion products affect further corrosion persistence in a complex way.