Nippon Steel Corporation

Akimi Umezono

Yuichi Sato

Hisao Odashima

Susumu Yamaguchi

Minoru Kitayama

Hironobu Kawasaki

Tomohiko Hayashi

The present invention relates to a method for forming on a magnetic amorphous alloy a film which is extremely thin, insulating, and corrosion-resistant and, particularly, can prevent secular deterioration of magnetic properties due to changing of the surface properties of the magnetic amorphous alloy. The method of the present invention comprises the steps of: applying, on the surface of the magnetic amorphous alloy, a predetermined amount of an acidic solution containing chromic acid, phosphoric acid, and a fluorine compound; and drying and baking the acidic aqueous solution, thereby forming, on the magnetic amorphous alloy, a film substantially comprised of a chromium and a phosphoric compound.

Method for surface treatment of a magnetic amorphous alloy

A scale inhibitor composition comprising Cr.sub.2 O.sub.3, reducing agent, refractory or clay, SiO.sub.2 and water glass, and a method of inhibiting the formation of scale on the surfaces of metal substrates to be heated in high temperature atmosphere by application of a coating of the scale inhibitor composition either on the metal surface, or on a subbing layer of a parting agent previously applied on the metal surfaces are disclosed, wherein improvements are effected particularly in both yield and prevention of surface scars.

Scale inhibitor compositions for application onto metal substrates to be

Growing community of inventors

Himeji, Japan

Akimi Umezono