Formation of polymer-like anticorrosive films based on organosilanes with benzotriazole, carboxylic and phosphonic acids. Protection of copper and steel against atmospheric corrosion

Abstract

A technique has been developed to create polymer-like protective layers on metal surfaces from aqueous solutions of organosilanols with benzotriazole, carboxylic or phosphonic acids. Using X-ray photoelectron spectroscopy (XPS) and scanning electron microscopy (SEM), it was shown that the introduction of hydroxyethylidene diphosphonic or citric acids into the inhibitor formulations leads to the formation of a multilayer polymer-like film on the metal surface. Electrochemical and corrosion tests (a technique of the polarization resistance and exposure of samples in the salt spray chamber) demonstrated the effectiveness of the formed multilayer films on metals to protect steel and copper against atmospheric corrosion.