期刊
WOOD MATERIAL SCIENCE & ENGINEERING
卷 5, 期 1, 页码 1-12出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/17480270903511642
关键词
Coating; field test; mould; relative humidity; temperature; wood substrate
资金
- Norwegian Institute of Wood Technology, Svertesopp pa trefasader'' (Mould growth on wooden facades) [NFR-168554/I10]
- Norwegian Research Council [NFR-169272/I10]
Development in surface mould growth on painted/unpainted wooden claddings and acting climatic factors were investigated over a period of 3 years. Eight wood substrates, including modified, preservative-treated and untreated wood, were tested in combination with three types of paint: (1) water-borne alkyd modified acrylic paint without fungicide; (2) solvent-borne alkyd paint without fungicide; and (3) ICP (internal comparison product). One set of samples was exposed unpainted. The samples were tested according to a modified version of EN 927-3. A logistic regression model was fitted to the data. The degree of mould growth varied with exposure time, coating typology, wood substrate, temperature and relative humidity. Exposure time and coating typology contributed most to the model. After 3 years of outdoor exposure unpainted panels and panels coated with solvent-borne paint without fungicide had more mould growth than panels coated with ICP and water-borne paint without fungicide. Unpainted oil/copper-organic preservative-treated claddings had higher resistance to mould growth than other unpainted wood substrates. Coated untreated pine and coated acetylated pine were more susceptible to mould growth than other coated wooden substrates.
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