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Corrosion film breakdown of galvanized steel in sulphate–chloride solutions
Highlights The effect of de-icers on the corrosion of galvanized steel was studied. The lowest corrosion rate was reported in the MgCl2 +Na2SO4 solutions. Samples immersed in NaCl+Na2SO4 solutions had the highest corrosion rate. Galvanized steel does not form a passive film under these conditions. Hsu and Mansfeld formula underestimated the film thickness values.
Abstract This work presents the corrosion performance of galvanized steel in sulphate–chloride solutions. The surface area changes, film breakdown susceptibility, and protectiveness of the corrosion products were studied using Potentiodynamic Polarization, Cyclic Voltammetry, Cyclic Polarization, and Electrochemical Impedance Spectroscopy. Samples immersed in MgCl2 solutions had the lowest corrosion rate, while samples immersed in the NaCl solutions showed the worst performance. The longer expected durability of samples immersed in MgCl2 was attributed to the lower corrosion kinetics, and a greater surface coverage by the corrosion product. However, results show that the formed corrosion layer is non-protective under any of the studied conditions.
Corrosion film breakdown of galvanized steel in sulphate–chloride solutions
Highlights The effect of de-icers on the corrosion of galvanized steel was studied. The lowest corrosion rate was reported in the MgCl2 +Na2SO4 solutions. Samples immersed in NaCl+Na2SO4 solutions had the highest corrosion rate. Galvanized steel does not form a passive film under these conditions. Hsu and Mansfeld formula underestimated the film thickness values.
Abstract This work presents the corrosion performance of galvanized steel in sulphate–chloride solutions. The surface area changes, film breakdown susceptibility, and protectiveness of the corrosion products were studied using Potentiodynamic Polarization, Cyclic Voltammetry, Cyclic Polarization, and Electrochemical Impedance Spectroscopy. Samples immersed in MgCl2 solutions had the lowest corrosion rate, while samples immersed in the NaCl solutions showed the worst performance. The longer expected durability of samples immersed in MgCl2 was attributed to the lower corrosion kinetics, and a greater surface coverage by the corrosion product. However, results show that the formed corrosion layer is non-protective under any of the studied conditions.
Corrosion film breakdown of galvanized steel in sulphate–chloride solutions
Padilla, Victor (author) / Alfantazi, Akram (author)
Construction and Building Materials ; 66 ; 447-457
2014-05-18
11 pages
Article (Journal)
Electronic Resource
English
Corrosion film breakdown of galvanized steel in sulphate–chloride solutions
| Online Contents | 2014
Corrosion film breakdown of galvanized steel in sulphate-chloride solutions
| British Library Online Contents | 2014
| British Library Online Contents | 2007