Complex borated coating with reference to increase of corrosion resistance of steel pipes in conditions of influence of cavitation-erosion environments

Experiments were made to investigate cavitation-erosion resistance of titanium-, chromium- and zirconium-borated coatings on steel 20. The coatings were produced by the method of activated vacuum diffusion saturation using the two-stage process. The cavitation-erosion resistance tests were performed by exposing the coated steel to ultrasonic action in aqueous suspension that comprised 2.5 wt.% B4C powder particles, about 150 μm in size. It has been found that the mentioned coatings, in particular, chromium- and titanium-borated coatings, improve the resistance of the initial steel 20 by factors of 6 to 8.