Effects of Artificial Weathering on Some Surface Properties of Anatolian Chestnut (Castanea Sativa Mill.) Wood Applied With Yacht Varnish

Abstract

Anatolian chestnut wood is an industrial material used in various indoor and outdoor applications in Turkey. This study investigated the effects of artificial weathering (times: 144, 288, 432, and 576 h) conditions on color parameters (L*, Delta L*, a*, Delta a*, b*, Delta b*, Delta E*, h(o), Delta H*, C*, and Delta C*), glossiness values at 60 degrees in different directions (parallel to and perpendicular to), pendulum hardness (Konig method) values, and surface adhesion strength (pull-off method, MPa) on the layers of yacht varnishes applied to Anatolian chestnut (Castanea sativa Mill.) wood. The results showed that the univariate analysis of variance was significant by obtaining the weathering factor for all tests. While the brightness values perpendicular (perpendicular to) and parallel (parallel to) to the fibers increased at 144 and 288 h, they decreased at 432 and 576 h. Adhesion strength to the surface decreased 4.35% at the 576th h of weathering. At the end of weathering, a*, C*, b*, and pendulum hardness values increased, while h(o) and L* values decreased compared to un-weathered samples. The Delta a* and Delta E* values increased with increased weathering time.