Corrosion inhibitors in conversion coatings. I. Magnetite coatings

Some of the common features and distinctions of two widely used means for c orrosion protection of metals, namely conversion coatings and corrosion inh ibitors, were discussed. Attention was focused on two basic applications of corrosion inhibitors to the enhancement of the protective properties of th e coatings. These are their use as components of a converting means and the passivation of a coating that is already formed. It was shown, with the ox idizing of low-carbon steel as an example, that corrosion inhibitors allow one to make this process more ecologically safe and less power-consuming. T he mechanism of steel oxidizing in nitrate solutions and a role of complexi ng corrosion inhibitors were discussed. The adsorption's features during th e passivation of a magnetite coating with aqueous solutions of inhibitors w ere analyzed with citation of effective adsorption applications.