Author(s)

Francesco Rosalbino^*, Giorgio Scavino, Graziano Ubertalli

Dipartimento di Scienza Applicata e Tecnologia (DISAT), Politecnico di Torino, Torino, Italy.

The influence of sodium silicate on the corrosion behaviour of aluminium alloy 7075-T6 in 0.1 M sodium chloride solution was studied by open circuit potential (OCP) and electrochemical impedance spectroscopy (EIS) techniques. Scanning electron microscopy (SEM) was used to characterize the AA7075-T6 surface. Silicate can significantly reduce corrosion deterioration and the inhibition efficiency increases with the concentration of Na₂SiO₃. The corrosion inhibition mechanism involves the formation of a protective film over the alloy surface by adsorption of aluminosilicate anions from solution, as has also been suggested by others in literature.

Aluminium Alloy 7075-T6, Silicate, Sodium Chloride, Electrochemical Impedance Spectroscopy (EIS), Scanning Electron Microscopy (SEM)

Rosalbino, F. , Scavino, G. and Ubertalli, G. (2024) Effectiveness of Sodium Silicate on the Corrosion Protection of AA7075-T6 Aluminium Alloy in Sodium Chloride Solution. Materials Sciences and Applications, 15, 53-65. doi: 10.4236/msa.2024.154005.