Structure of Rust Layer of Pre-rusted Carbon Steel Coated with Cellulose Nanofiber Dispersion Coatings Containing Nickel Sulfate

Abstract

Rust structure on carbon steel coated with cellulose nanofiber dispersion resin containing nickel sulfate was investigated after corrosion under repeated dry and wet conditions. X-ray diffraction and electrochemical measurements were performed to evaluate the rust composition and anticorrosion properties of the rust layer. It was found that the proportion of stable α-FeOOH increased, especially with the addition of nickel sulfate. The decrease in corrosion rate might be due to the increase in mass fraction of α-FeOOH.