METHOD OF CONTROLLING THE QUALITY OF COATINGS OF PARTS MADE FROM ALUMINUM ALLOYS OPERATING IN CAVITATION CONDITIONS Russian patent published in 2019 - IPC G01M10/00 G01N3/60 

FIELD: technological processes.

SUBSTANCE: invention relates to methods of protecting parts from aluminum alloys using hardening coatings and controlling said coatings in operation of parts in cavitation conditions and can be used to select optimum coating conditions and composition of electrolyte in MAO in terms of cavitation resistance. Essence: samples are made from aluminum alloy, coating is obtained on their working surfaces, exposing the obtained coating of the samples to a liquid medium with subsequent evaluation of the coating quality based on the results of said exposure. Coating on working surfaces of samples is obtained by micro-arc oxidation, wherein to obtain coating for different samples, micro-arc oxidation with electrolytes of different composition is used, and exposure of samples to liquid medium is carried out by excitation of mechanical oscillations of sample immersed in liquid medium. During such action weight of each sample is periodically measured, measured weight is used to determine mass of coating lost by each sample depending on time of their exposure, from which value and rate of erosion of each sample are determined, values of which are calculated from dependencies.

EFFECT: high accuracy of determining the service life of protective coatings of aluminum alloy parts obtained by MAO and operating in cavitation conditions.

1 cl, 6 dwg