The Institute of Metal Physics has developed a technology for deposition of a hard amorphous diamond-like carbon coating on the surface of driving drums (made of an aluminum alloy) in banknote sorting and counting machines used at banking and commercial institutions. The coating thickness is 0.5-1.5 µm. An important feature of the coating is an intermediate adhesion layer.

By deposition of a diamond-like coating, the improved wear resistance of the driving drums surfaces has made it possible to reduce the frequency of control operations needed for adjustment of the banknote feeding system and for replacement of worn-out drums; to increase the overall reliability of the machines, with improved quality of sorting and counting of banknotes; and to decrease energy consumption and service expenses.