Análise da influência do tratamento preservativo na cor e rugosidade de superfícies de madeiras tropicais

Abstract

Although the chemical treatments increase wood durability, there are side effects due to the use of some products, such as the change of its original color and in its surface. The present work aimed to evaluate the surface of three tropical wood species impregnated with CCA preservative using colorimetric and roughness techniques. We used three tropical wood species representing groups of low, medium and high density. The color of the wood samples changed significantly, darkening with reduction of red and yellow pigments and a tending to surface's greening. Regarding roughness, all samples showed an increase in the arithmetic mean roughness (Ra) and the mean maximum height (Rz), increasing surface roughness.