METHOD OF COATING METAL FORMES FROM Al-Mg AND Al-Si ALLOYS FOR MANUFACTURING AUTOMOBILE TIRES Russian patent published in 2017 - IPC C23C22/06 C23C22/34 C23C22/56 C23C22/78 C23C22/82 C23C28/00 

FIELD: transportation.

SUBSTANCE: in the method, the form is degreased and etched in a bath with a pH from 11.0 to 12.5 at a temperature of 50 to 70°C for 1-2 minutes, washed in demineralized water at a temperature from 20 to 30°C, then it is immersed in a bath with a liquid zirconium passivating thing with a pH from 4.8 to 5.2 at a temperature of 25 to 30°C for 2-3 minutes, then again washed in demineralized water at a temperature from 20 to 30°C, dried at a temperature from 110 to115°C for 20-25 minutes. Next, a final coating is formed in the bath with an aqueous dispersion of polytetrafluoroethylene with a pH from 7.5 to 8.5 at a temperature from 60 to 65°C for 15-16 minutes, the coating is baked at a temperature from 100 to 105°C for 30-40 minutes.

EFFECT: increased number of cycles of tire manufacturing without the need to clean the working surface of the mentioned form for tire manufacturing.

4 cl, 3 dwg