METHODS OF PROTECTING FRICTION UNIT PARTS OF MACHINES AND EQUIPMENT USED IN MICROBIOLOGICAL AND PHARMACEUTICAL INDUSTRIES FROM HYDROGEN WEARING

摘要

The results of theoretical and experimental investigations into strengthening friction unit parts of the machines operating in contact with biochemically reactive technogeneous media are presented. As it has already been shown the agent intensifying the failure of friction surfaces of machine parts in these conditions is biogeneous hydrogen. One of the effective methods for improving their wear resistance is the gas-thermal spraying of powder self-fluxing chrome-nickel alloys and compositions on their base on the working surfaces of machine parts with the subsequent alloying of a coating top layer with copper. It is shown that the addition of small amounts of copper results in the formation of a multicomponent coating with a three-layer structure. Possessing the properties of a biocide, copper retards the biofailures and because of servo-like film formed at a friction contact ensures the operation of kinematic couples under self-shifting selective transfer, which reduces the saturation of the surface with hydrogen.