ZINC IMPREGNATION METHOD OF METAL PARTS Russian patent published in 2010 - IPC C23C10/36 

FIELD: metallurgy.

SUBSTANCE: invention refers to procedures of application of protective corrosion-resistant coatings. Method involves preparation of part surfaces, simultaneous loading of parts and mixture of powdered components to working chamber, heating of working chamber up to temperature of diffusion interaction of the charge material with the surface of treated metal parts within 350-450°C, exposure and chemical passivation in water solution medium of phosphorus compound. Before heating, vacuum treatment of working chamber is performed up to residual pressure of 0.1 kPa. Then there performed is contact of the parts throughout the surface with powdered mixture at vibration, and inert gas is pumped to working chmaber. Mixture of powdered components contains the following ingredient ratio, wt %: powdered zinc 55-85, inert filler - silicon dioxide or aluminium oxide - the rest. Mixture of powdered components has degree of dispersion of not less than 0.01 mcm.

EFFECT: obtaining protective zinc coating on parts of small attachments and irregular-shaped parts, as well as providing film thickness of the coating on parts within 5,0 to 60,0 mcm in order to increase corrosion resistance of parts.

1 dwg, 1 tbl, 3 ex