Building Structures and Materials
Degradation Models for Ten-year Weathering of Architectural Coatings
2005 年 4 巻 2 号 p. 455-460
詳細
2005 年 4 巻 2 号 p. 455-460
An outdoor exposure-testing program for architectural coatings was conducted in Tsukuba from 1987-1997.
Observed gross retention of samples set horizontally, 5-deg. south and 30-deg. south was on average severer than that of 90-deg. south, while the conditions of 90-deg. north are more moderate. The lightness of white samples decreased during the early part of the first year and was almost constant, thereafter. Delta L* of 90-deg. south and 90-deg. north is smaller than that of horizontal, 5-deg. south and 30-deg. south.
Koike and Tanaka′s equation is a more appropriate analytical method regarding the weatherability of exposed paints and coatings than the conventional system, which uses solar UV.
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