The Parts Corrosion Resistance Dependence on the Adhesive Strength of Zinc-Based Vibrational Mechanochemical Coatings

The article reveals the connection between the corrosion resistance and the strength of the mechanochemical zinc-based coatings formed in the vibration technology systems. The coating process is shown as a combination of mechanical and physico-chemical phenomena occurring simultaneously on the surface of a metal under the shock-pulse action of the activating environment indenters under the low-frequency vibrations conditions; synchronously, a coating is formed in the “coating-base” zone of local contact interaction, the main parameter of which is adsorption. It was found that the chemical interaction of the coating process with the metal can ensure the same adhesive strength as the coating as a result of the difference in energy contribution in the coating formation process. The corrosion resistance correlation dependence estimated by the permeability index on the coating adhesive strength is proposed, which allows to develop the technological schedule by regulating the mechanical and chemical process parameters at the technological preparation production stage with the sufficient accuracy for practice, while ensuring the required value of adhesive strength and the most environmentally preferable conditions for coating formation. It is outlined: the technical efficiency of the coating process under the control of mechanical parameters is 2–3% higher than that of the control of the process using chemical parameters; for structural steel samples under the selected coating conditions the corrosion resistance increases by 9.8 to 46.6 times compared with the non-coating samples, indicating the high degree of protective anticorrosive properties of vibrational mechanochemical zinc-based coverages.