On a possibility of chrome carbide coating deposition on magnesium alloys
Pyrolytic chrome carbide coating were deposited on samples of wrought (MA2-1, MA14) and cast (ML5pch, ML10) magnesium alloys in the temperature range 450 - 500 °С, using pyrolytic chromium-plating plant VRPO-08. These researches established that for magnesium alloys with high content of zinc is impossible chrome carbide coating deposition due to alternative zinc sublimation from surface of the sample. Formed as a result of this process, the cavity can reach depths up to 0.3 mm. It is shown that the values of microhardness by chrome carbide coating depend on the temperature of deposition, with increasing temperature of the reactor increases and the amount of coating microhardness, also with an increase temperature of coated sample increases and the rate of coating deposition. Deposited on the samples from the ML10-alloy, pyrolytic chrome carbide coating exactly follows the ground of coated surface.