A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Effect of de-icing salts on the corrosion performance of galvanized steel in sulphate contaminated soil
Highlights ► The effect of de-icers on the corrosion of galvanized steel was studied. ► CH3CO2K appears to have the best performance in sulphate free solutions. ► In the presence of sulphate, MgCl2 and CaCl2 yield the lowest corrosion rate. ► The addition of sulphate increases the susceptibility of galvanized steel to corrosion. ► EIS shows that galvanized steel does not form a passive film under these conditions.
Abstract Failure of mechanically-stabilized earth (MSE) walls attributed to the corrosion of galvanized steel in soil has raised concern on the use of an appropriate type of the de-icing salt for the maintenance of the roads in the winter. This work presents the effect of commonly used de-icing salts such as sodium chloride, magnesium chloride, calcium chloride, and potassium acetate on the corrosion performance of the galvanized steel in sulphate contaminated soil. To achieve this goal, different electrochemical testing methods such as potentiodynamic polarization, Linear Polarization Resistance, and electrical impedance spectroscopy were used to determine the corrosion rate of galvanized steel reinforcement in sodium sulphate containing solution. Results showed that the presence of sulphate in the soil significantly increased the corrosion rates and, thus, it is important to consider the effect of sulphate in determining the type of de-icing salt. In sulphate-free solution, potassium acetate appeared to be the best option; while in the presence of sulphate, MgCl2 and CaCl2 had the lowest corrosion rate.
Effect of de-icing salts on the corrosion performance of galvanized steel in sulphate contaminated soil
Highlights ► The effect of de-icers on the corrosion of galvanized steel was studied. ► CH3CO2K appears to have the best performance in sulphate free solutions. ► In the presence of sulphate, MgCl2 and CaCl2 yield the lowest corrosion rate. ► The addition of sulphate increases the susceptibility of galvanized steel to corrosion. ► EIS shows that galvanized steel does not form a passive film under these conditions.
Abstract Failure of mechanically-stabilized earth (MSE) walls attributed to the corrosion of galvanized steel in soil has raised concern on the use of an appropriate type of the de-icing salt for the maintenance of the roads in the winter. This work presents the effect of commonly used de-icing salts such as sodium chloride, magnesium chloride, calcium chloride, and potassium acetate on the corrosion performance of the galvanized steel in sulphate contaminated soil. To achieve this goal, different electrochemical testing methods such as potentiodynamic polarization, Linear Polarization Resistance, and electrical impedance spectroscopy were used to determine the corrosion rate of galvanized steel reinforcement in sodium sulphate containing solution. Results showed that the presence of sulphate in the soil significantly increased the corrosion rates and, thus, it is important to consider the effect of sulphate in determining the type of de-icing salt. In sulphate-free solution, potassium acetate appeared to be the best option; while in the presence of sulphate, MgCl2 and CaCl2 had the lowest corrosion rate.
Effect of de-icing salts on the corrosion performance of galvanized steel in sulphate contaminated soil
Padilla, Victor (author) / Ghods, Pouria (author) / Alfantazi, Akram (author)
Construction and Building Materials ; 40 ; 908-918
2012-09-20
11 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2013
Corrosion film breakdown of galvanized steel in sulphate-chloride solutions
| British Library Online Contents | 2014