Title:
COMPOSITE SPRAY COATED MEMBER EXCELLENT IN CORROSION RESISTANCE AND EROSION RESISTANCE AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3039850
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve the resistance to the erosion action caused, e.g. by the dust discharged from a converter and composed essentially of iron oxide and the droplets of molten steel, to improve cooling property, and to prolong the service life of a member.
SOLUTION: This composite spray coated member can be produced by forming an undercoat sprayed coating 7 composed of heat resistant metal or its alloy or carbide cermet on the surface of a base material such as pipe to 20-500μm thickness, interposing a porous inorganic film 9 if necessary, applying a sealing agent composed essentially of chromic acid and phosphoric acid onto the above, and, after drying, performing heating and baking at 350-550°C for ≥0.3hr to form a hard vitreous chromium oxide film 8 with a thickness of 0.5-20μm, preferably 2-5μm, as an upper layer.
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Inventors:
Yoshio Harada
Ikiyoshi Miyajima
Takema Teratani
Ikiyoshi Miyajima
Takema Teratani
Application Number:
JP4258996A
Publication Date:
May 08, 2000
Filing Date:
February 29, 1996
Export Citation:
Assignee:
Tocalo Co., Ltd.
International Classes:
C03C17/25; C21C5/40; C23C4/06; C23C4/10; C23C4/18; C23C28/00; (IPC1-7): C23C4/18; C03C17/25; C21C5/40; C23C4/06; C23C4/10; C23C28/00
Attorney, Agent or Firm:
Junzo Ogawa (1 person outside)