COMPOSITION OF CORROSION-RESISTANT COATING FOR PROTECTION OF TECHNOLOGICAL PETROCHEMICAL EQUIPMENT Russian patent published in 2017 - IPC C23C4/08 C22C38/44 

FIELD: chemistry.

SUBSTANCE: corrosion-resistant coating to protect the internal surface of process equipment exposed to wear under the influence of a medium with a hydrogen sulfide content of up to 20% contains, wt %: Cr 13-22, C 0.01-0.1, Mo 1.0-3.0, Ni 10.0-14.0, Fe is the rest, or Cr 20-28.5, C 0.1-1.5, Si 1.0-2.0, Mn 0.5-1.1, Mo 3.0-5.0, Ni 14.5-17.0, Fe - the rest. Corrosion-resistant coating for the protection of the internal surface of process equipment subjected to wear under the influence of a medium with a hydrogen sulphide content of more than 20% contains, wt %: Cr 16.0-18.0, C 0.01-0.1, Mo 1.0-3.0, Ti 0.5-1.2, Ni 12.0-14.0, Fe - the rest, at the carbon equivalent of Cequ in the range of 4.50 to 5.3 and the coefficient of pitting resistance PREN in the range of 22.6 to 30.2, or Cr 20-24.0, C 0.01-0.02, Fe 3.0-5.0, Mo 13.0-15.0, W 2.0-4.0, Ni - the rest, with the carbon equivalent of Cequ in the range of 9.5 to 11.2, and the coefficient of pitting resistance PREN in the range of 60.25 to 76.4.

EFFECT: invention makes it possible to increase the adhesion to the base material, corrosion-mechanical properties: wear resistance, abrasion resistance, corrosion resistance.

4 cl, 4 ex