The results of the investigation of the process of laser treatment of iron-alloyed coatings, and of the structure and wear resistance of the surfaces, obtained in a methyl-sulphate-chloride electrolyte are reported. It is established that, in a multicomponent electrolyte, it is possible to obtain coatings with a thickness not less than 3 mm with a fibrous, granular, and stratified structure. The formation of many macrozones, characterized by different structure and phase transformations, is possible through CO2 laser treatment (LT) of iron-alloyed coatings (IAC). Restored and hardened surfaces of internal-combustion engine parts under conditions that ensure the generation of an amorphous layer have a wear resistance several times higher than untreated alloyed electroplated coatings.