Surface treatment

Patent Granted A metal glass part furnished with a surface layer combining coating durability and chromatic color properties; and a method of forming the surface layer. Oxide film (12) is removed from the surface of metal glass part (10) by reaction with mixed aqueous solution (18) of nitric acid and hydrofluoric acid. Simultaneously, surface activating treatment for preparing anchoring configuration (14) on the surface of the metal glass part (10) is carried out.