The paper deals with new layers of the systems Cr-Mo-Ni-Si and Cr-Mo-Co-Si bearing the common name "ChroSiMol". These layers are applied by means of atmospheric plasma spraying on metallic substrates of iron, nickel, cobalt, and titanium-based alloys and serve as corrosion, oxidation and wear protection for these metals at temperatures up to max. 900°C. The layer ChroSiMol is an acid-resistant layer and provides for its substrates a perfect protection against hot sulfuric acid and phosphoric acid in all concentrations. With a hardness of approx. 900 HV and very good anti-friction properties of the molybdenum-containing surface, these layers are optimally suited for use with friction pairs with corrosive loads.