Rust preventive film characterization by electrochemical impedance spectroscopy and the ASTM B117 method Conference Paper uri icon

abstract

  • Rust preventives were applied to steel coupons and characterized by electrochemical techniques and ASTM(1) B117 standard method using 5% sodium chloride as the electrolyte. The results obtained by both approaches are compared and used to explain the mechanism and damage evolution at the interface of rust preventive film and steel substrate. Electrochemical impedance spectroscopy (EIS) is a technique that has been used to quantify and characterize the mechanisms that occur when metal/film or metal/coating interfaces are exposed to corrosive environments. This work describes the methodologies required for advanced electrochemical technique setup with EIS, which qualitatively characterizes soft films that act as barriers to corrosion. The proposed technical method is a demonstration using different thin film samples that can guide the path forward for the most suitable selection of a film that will prevent corrosion of steel substrates exposed to high concentrations of chlorides. © 2013 by NACE International.

author list (cited authors)

  • Bacco, A., Faber, B., Minch, B., & Castaneda, H.

publication date

  • September 2013