Ultrasonically Assisted Mechanical Technique for Creation of Metal Protecting Coatings

This research introduces an innovative ultrasonic-driven mechanochemical technique for creating protecting coatings, either metallic or ceramic, on metallic surfaces with the purpose of corrosion inhibition. Two variations of the method have been explored. In the first variation, hard balls and powdered metal or ceramics are placed inside a bowl-shaped resonant chamber that is secured beneath the surface to be coated. In the second variation, only the balls are contained in the chamber while the surface has been pre-treated with a mixture of a liquid and powder was applied as a suspension. An ultrasonic transducer affixed to the bottom of the chamber induces high-frequency vibrations, resulting in chaotic movement and collisions between the balls and powder particles, effectively hammering them into the metallic surface. Experimental investigations utilized substrates made of aluminum and stainless steel, along with powders such as titanium, silicon carbide, and alumina, as well as various liquids for the pre-coating process. The findings indicated that the technique facilitates the creation of diverse coatings and protective layers on metal surfaces at ambient temperatures, irrespective of the differences in the properties of the materials employed.