Electrochemical Corrosion and Tribocorrosion Properties of Sol-Gel ZrO2 Films Coated on Stainless Steel in the Diverse NaCl Aqueous Solutions

ZrO2 films were deposited on 304 stainless-steel substrates by a sol-gel spin coating method. Electrochemical testing technology and a to-and-fro wear test apparatus were used to study the electrochemical corrosion and tribocorrosion properties of the films in different NaCl solutions. According to the results, the coated specimens are better than the bare matrix in resistance to corrosion and tribocorrosion. In the NaCl solutions, increasing either the solution temperature or concentration decreases the protective effects of the ZrO2 films; study of the solution temperature factor show that serious pitting corrosion and obvious cracking occur on the surface of the coated specimens; study of the solution concentration factor show pitting corrosion on the sample surfaces. Regarding the tribocorrosion of the coated specimens, as the NaCl concentration increases from 2% to 6.5%, the abrasive wear is more obvious, and the corrosive wear is aggravated.