PROCEDURE FOR COVERING WORK PIECES OUT OF METALS AND ALLOYS WITH PROTECTIVE COATING Russian patent published in 2011 - IPC C23C28/00 

FIELD: metallurgy.

SUBSTANCE: procedure for making protective coating on work pieces out of zirconium, titanium and their alloys subjected to high temperature heat during heat treatment and to hot deformation consists in application of protective layer containing alloy of nickel with phosphorus on surface of a work piece. Also, the layer containing alloy of nickel with phosphorus is applied by chemical sedimentation, whereupon on surface of a work piece there is applied a covering layer containing, wt %: CaO 1-10; Na₂O 12-17; K₂O 5-10; TiO₂ 1-45; the rest SiO₂ or P₂O₅ 28-32; Na₂O 32-37; Al₂O₃ 3-5; CaO 0.5-1.0; MgO 0.5-1.0; BaO 0.5-1.0; ZnO 0.5-1.0; TiO₂ 0.5-1.0; the rest SiO₂.

EFFECT: simplified application of protective-lubricating coating on metals and alloys.

1 tbl, 4 ex, 3 dwg