The role of coatings in reducing erosion intensity

Abstract

The article proposes a method for increasing the erosion resistance of parts by applying
coatings on their working surfaces. It will significantly increase their service life while in operation.
The article considers the role of electrolytic chrome-plating for workpieces experiencing erosive
wear on stream. The effect of the current density on the degree of wear and on the microhardness of the
electroplated coating. It was found that the current density equal to 60 A / dm2 should be considered
optimal since this regime corresponds to the minimum wear min.
The article presents the technology of protection of engine cylinder bushings with a plasmasprayed
(porous) coating. It is shown that the subsequent impregnation with varnish (bakelitization)
reduces the porosity of the plasma coating. The authors have revealed the thickness of the plasma-sprayed
coating, which provides optimal wear resistance, and the optimal surface roughness is microns. The authors have tested the effectiveness of protection of the water-cooled surfaces of the
bushings with a coating in natural conditions. The article presents the results of using a protective nonmetallic
coating for bushings, which ensures stable operation of engine cooling systems under all loads.