Investigation of Chloride Corrosion Process of Cement and Concrete-Based Materials Based on Electrochemical Impedance Spectroscopy

Li, Shengbin; Hu, Bingxu; Zhang, Fan

doi:10.1166/jno.2017.2286

Cited by 4 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the larger i corr is, the faster the corrosion rate of the steel bar is. Relevant studies [ 41 , 42 ] have shown that chloride ion penetration would cause steel corrosion in intact ordinary concrete. However, Figure 9 shows that the i corr of the steel bars in BFRPC and RPC remains unchanged with the increase of chloride ion penetration time and the i corr value is less than the threshold value (0.2 μA/cm 2 ).…”

Section: Resultsmentioning

confidence: 99%

Steel Corrosion Evaluation of Basalt Fiber RPC Affected by Crack and Steel-Concrete Interface Damage Using Electrochemical Methods

Liu¹,

Lyu²,

Zhang³

et al. 2020

Sensors

View full text Add to dashboard Cite

Basalt fiber (BF) is a new anti-corrosion and environmentally friendly material, which is expected to delay the corrosion process of steel bars and improve the durability of reinforced reactive powder concrete (RPC). The electrochemical method is a nondestructive testing and real-time monitoring technique used to characterize the corrosion behaviors of steel bars embedded in concrete structures. In this paper, the electrochemical technique was employed to evaluate the corrosion of steel bars embedded in basalt fiber modified reactive powder concrete (BFRPC). Besides, crack and steel-concrete interface damage (SCID) were considered as typical factors that affect steel corrosion in concrete. Thus, both reinforced fiber-free RPC and BFRPC specimens with crack and SCID were prepared for evaluating the steel corrosion behaviors by electrochemical methods. The results revealed that both crack and SCID would aggravate the steel corrosion, and the crack was the major factor that affects the corrosion process. Moreover, the excellent compactness of BFRPC and the bridging action of BF could effectively prevent the concrete cracking and steel corrosion process of concrete. Using reinforced BFRPC instead of ordinary concrete in practical projects could greatly extend the service life of steel bars.

show abstract

Section: Resultsmentioning

confidence: 99%

Steel Corrosion Evaluation of Basalt Fiber RPC Affected by Crack and Steel-Concrete Interface Damage Using Electrochemical Methods

Liu¹,

Lyu²,

Zhang³

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

Study on Durability against Dry-Wet Cycles and Chloride Ion Erosion of Concrete Revetment Materials at the Water-Level-Fluctuations Zone in Yellow River Delta Wetlands

Sun

Wang

et al. 2020

Wetlands

View full text Add to dashboard Cite

Electrochemical Behavior of Carbon Fiber - Coupled Steel in Concrete Environment

Bai¹

2020

International Journal of Electrochemical Science

View full text Add to dashboard Cite

As a new structural building material, carbon fiber-reinforced concrete has very good flexural strength, wear resistance and impermeability. However, because carbon fiber is a good conductor, the durability of reinforced concrete structures may be affected if it comes into contact with steel bars in the concrete, thus allowing the formation of a galvanic couple. In this paper, electrochemical tests and corrosion weightlessness experiments were carried out in a pore fluid of concrete with a pH of 12.5. The results showed that when carbon fiber was coupled with carbon steel, the double layer capacitance (Cdl) increased and the charge transfer resistance (Rct) decreased. The thickness of the passivation film decreased, and the protective performance of the passivation film on the carbon steel decreased. Moreover, the corrosion potential of the carbon steel increased, the corrosion current density increased, and the corrosion rate of the carbon steel increased. An XPS analysis confirmed the results of the electrochemical experiments. After carbon fiber coupling, the ratio of Fe 3+ /Fe 2+ on the surface of the carbon steel decreased, and the stability of the passive film on the surface of the carbon steel decreased. Although coupling with carbon fiber had a negative effect on the passivation of the carbon steel, the surface of the carbon steel could still maintain good passivation in a chloride-free simulated pore fluid environment.

show abstract

Investigation of Chloride Corrosion Process of Cement and Concrete-Based Materials Based on Electrochemical Impedance Spectroscopy

Cited by 4 publications

References 0 publications

Steel Corrosion Evaluation of Basalt Fiber RPC Affected by Crack and Steel-Concrete Interface Damage Using Electrochemical Methods

Steel Corrosion Evaluation of Basalt Fiber RPC Affected by Crack and Steel-Concrete Interface Damage Using Electrochemical Methods

Study on Durability against Dry-Wet Cycles and Chloride Ion Erosion of Concrete Revetment Materials at the Water-Level-Fluctuations Zone in Yellow River Delta Wetlands

Electrochemical Behavior of Carbon Fiber - Coupled Steel in Concrete Environment

Contact Info

Product

Resources

About