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Title:
SURFACE TREATMENT FOR BUILDING MATERIAL
Document Type and Number:
Japanese Patent JPH03281769
Kind Code:
A
Abstract:

PURPOSE: To obtain a building material which has a surface excellent in durability, having a luster like that of a metallic sheet, and practically free from soil by thermally spraying a metal on the surface of a building material to form a metallic film and then grinding the surface of this metallic film.

CONSTITUTION: Fine grains 3 of metal, such as zinc and copper, are thermally sprayed on a substrate material 1 of concrete, etc., as a building material by using a thermal spray gun 2, by which a metallic film 4 is formed on the surface of the substrate material 1 (A). At this time, the film 4 has many pores 4a inside and also has ruggedness in great numbers in the surface (B). Subsequently, the surface of the film 4 is ground by means of a disk grinder 6 fitted with an abrasive material, such as abrasive powder and abrasive grindstone (C). As a result, the film 4 which is smoothed because the grain boundaries among the thermally sprayed grains disappear owing to plastic flow and in which the pores are also reduced can be obtained (D). Then, a colorless and transparent clear coating material is applied to the surface of the film 4 to prevent the contact of the film 4 surface with air and inhibit surface oxidation, by which the film 4 capable of maintaining metallic luster over a long period can be obtained.


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Inventors:
AOYAMA MIKI
HAYASHI YOSHIMASA
OGAWA HARUKA
TAMURA ETSUNORI
TOKUNAGA TAKATSUGU
Application Number:
JP1990000081184
Publication Date:
December 12, 1991
Filing Date:
March 30, 1990
Export Citation:
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Assignee:
OHBAYASHI CORP
NIHON KAIHATSU DOBOKU KK
NIPPON ALUMINIUM CO LTD
International Classes:
B05D1/08; C04B41/51; C23C4/04; C23C4/18; (IPC1-7): B05D1/08; C23C4/04; C23C4/18
Domestic Patent References:
JPS5159033A1976-05-22
JP62173433B