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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 were better than the bare substrate regarding resistance to corrosion and tribocorrosion. In the NaCl solutions, increasing either the solution temperature or concentration decreased the protective effects of the ZrO2 films; study of the solution temperature factor showed that serious pitting corrosion and obvious cracking occurred on the surface of the coated specimens; study of the solution concentration factor showed pitting corrosion on the sample surfaces. Regarding the tribocorrosion of the coated specimens, as the NaCl concentration increased from 2% to 6.5%, the abrasive wear was more obvious, and the corrosive wear was aggravated.