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A Quantitative Weathering Study of Wood Surfaces Modified by Chromium VI and Iron III Compounds. Part 1. Loss in Zero-span Tensile Strength and Weight of Thin Wood Veneers

A Quantitative Weathering Study of Wood Surfaces Modified by Chromium VI and Iron III Compounds.... Introduction Wood exposed to the weather undergoes rapid superficial degradation due principally to the effects of light and water. Although paints and varnishes are used to ameliorate the effects of weathering, some degradation of the wood Substrate may occur beneath substantially intact surface coatings. For example, the transmission of light in the visible spectrum through clear finishes may result in photodegradation of wood (Derbyshire and Miller 1981). Similarly, uptake of water through imperfections in opaque coatings may result in hydrolytic degradation of wood with prolonged exposure (Evans and Banks 1988). -Since finishes applied to pre-weathered wood surfaces are rapidly degraded (Ashton 1967) it is thought that superficial degradation of wood is an important factor limiting the life of surface coatings applied to wood. Accordingly, application of chemical pre-treatments which stabilize wood surfaces against the deleterious effects of light and water may be a means of increasing the life of coatings applied subsequently. Application of dilute aqueous Solutions of inorganic metal comHolzforschung / Vol. 43 /1989 / No. 5 Copyright © 1989 Walter de Gruyter · Berlin · New York pounds to wood surfaces are reported to reduce microscopic cell wall checking in wood caused by irradiation with ultraviolet http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Holzforschung - International Journal of the Biology, Chemistry, Physics and Technology of Wood de Gruyter

A Quantitative Weathering Study of Wood Surfaces Modified by Chromium VI and Iron III Compounds. Part 1. Loss in Zero-span Tensile Strength and Weight of Thin Wood Veneers

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References (12)

Publisher
de Gruyter
Copyright
Copyright © 2009 Walter de Gruyter
ISSN
0018-3830
eISSN
1437-434X
DOI
10.1515/hfsg.1989.43.5.289
Publisher site
See Article on Publisher Site

Abstract

Introduction Wood exposed to the weather undergoes rapid superficial degradation due principally to the effects of light and water. Although paints and varnishes are used to ameliorate the effects of weathering, some degradation of the wood Substrate may occur beneath substantially intact surface coatings. For example, the transmission of light in the visible spectrum through clear finishes may result in photodegradation of wood (Derbyshire and Miller 1981). Similarly, uptake of water through imperfections in opaque coatings may result in hydrolytic degradation of wood with prolonged exposure (Evans and Banks 1988). -Since finishes applied to pre-weathered wood surfaces are rapidly degraded (Ashton 1967) it is thought that superficial degradation of wood is an important factor limiting the life of surface coatings applied to wood. Accordingly, application of chemical pre-treatments which stabilize wood surfaces against the deleterious effects of light and water may be a means of increasing the life of coatings applied subsequently. Application of dilute aqueous Solutions of inorganic metal comHolzforschung / Vol. 43 /1989 / No. 5 Copyright © 1989 Walter de Gruyter · Berlin · New York pounds to wood surfaces are reported to reduce microscopic cell wall checking in wood caused by irradiation with ultraviolet

Journal

Holzforschung - International Journal of the Biology, Chemistry, Physics and Technology of Wood – de Gruyter

Published: Jan 1, 1989

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