PROTECTIVE COATING AND METHOD OF ITS APPLICATION Russian patent published in 2021 - IPC C23C18/02 C23C24/00 C23F11/00 B82Y30/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metal corrosion protection. The protective coating of the surface of unalloyed steel contains 5-75 wt.% of the powder of a phosphorus-modified copper-carbon nanocomposite, distributed in industrial oil I-20. To obtain a protective coating, a composition containing industrial oil I-20 with 5-75 wt.% of powder modified with phosphorus copper-carbon nanocomposite is applied to the surface of unalloyed steel, and subjected to thermochemical activation by heating for 20 minutes at a temperature of 100-200°C. During the formation of the coating, strong donor-acceptor bonds of iron atoms with phosphorus, which are in the composition of the copper-carbon nanocomposite, are formed, which, according to X-ray electron spectroscopy spectra, are stable at room temperature and when heated to 500°C and above.

EFFECT: invention provides a high degree of protection of the surface of unalloyed steel from corrosion by obtaining strong chemical bonds between the atoms of the anticorrosive coating and its strong chemical adhesion to the surface of the steel.

3 cl, 3 tbl, 2 dwg