Titanium metal-coating material, method for production thereof, method for coating therewith, and product coated therewith

A method for the formation of a coating of a calcium phosphate on the surface of a titanium metal, which comprises:

• mixing CaO, TiO.sub.2 and P.sub.2 O.sub.5 in amounts to give a molar ratio in the range of 9:4.6 to 5.4:5.6 to 6.4 to obtain a first mixture;
• adding to said first mixture a sodium compound in an amount to give a molar concentration, calculated in terms of Na.sub.2 O, in the range of 1 to 5 mol % of said first mixture, thereby obtaining a second mixture;
• fusing said second mixture by heating to a temperature of at least 1,200.degree. C. to produce a vitrified melt;
• preparing an aqueous slurry containing said vitrified melt;
• applying said aqueous slurry on the surface of a titanium metal;
• and
• heat-treating said titanium metal coated with said aqueous slurry at a temperature in the range of 600.degree. to 1,300.degree. C.