Determination of adhesion of the coating deposited by arc spraying with pulsation of atomizing air flow

During electric arc spraying, during the transfer of molten metal by air flow, there is a significant burnout alloying elements with formation large amount oxides, which negatively affects adhesion coating to base. A solution problem increasing strength using pulsation atomizing flow proposed. At optimal frequency pulsed shut-off, time liquid droplets at ends electrodes coincides pulses spraying flow. As result, acquire an size, they are transported conservation energy, lower mass oxygen and, as consequence, decrease in oxidation sprayed material. The existing test methods coatings for base analyzed. design modernized device determining developed and described, provides complex loading combination tear-off shear. tests revealed (up two times) increase aluminum, zinc-aluminum steel (Sv08A) applied pulsation. This achieved number fusion zones particles between themselves It shown that effect on changes along curve maximum corresponding 70–80 Hz, regardless has been established aluminum increased tendency oxidation, result it 15–20 % inferior strength. data obtained substantiate use proposed technology production