Vacuum coating machine When the concentration electrolysis test vacuum plating equipment remains unchanged, the coating machine changes the current density and electrolyte temperature, and smooth (hard) chromium can obtain three different lattice layers, namely gray face, bright and milky white chromium layer.

1) The gray chromium layer is obtained at low temperatures, and the chromium layer of the coating machine is obtained at high current density. From a high degree (HV=uoo), the method of toughness, a mesh pattern, strong colors, dark crystals. Use measuring tools and chrome plating.
2) The bright chromium layer is a chromium layer obtained at the medium temperature, with a low current density in the coating machine. High hardness (HV=800), good toughness, wear resistance, low internal stress, dense grid lines, fine grains, and bright surface. Suitable for repairing worn parts.
3) The milky white chromium layer is a chromium layer obtained at higher temperatures. The plastic coating machine with low current density and low hardness (HV=400-500) has good plasticity, no network wrinkles, fine crystals, and is suitable for increasing the size of impact loaded parts and plating decorative chromium.

Porous (loose hole chromium plating, chromium plating layer) vacuum coating machine, as well as dot like chromium layer and chromium layer groove like, can be used by electrochemical and mechanical methods. The performance of porous chromium plating for adsorbing lubricating oil. Therefore, it has better wear resistance.