Автор: Невена Баташева
- INFLUENCE OF WATER-THERMAL CYCLIC TREATED ON THE ADHESION OF PROTECTIVE COATS, FORMED ON WOOD
Wood outdoor exposed in normal atmospheric condition affect the colour and texture due to the impact of UV spectrum of light. Although UV rays penetrate into the wood to a depth of not more than 75–100 µm, they are main cause for initiation of weathering it, due to the conduct of complex and physical- chemical processes. As a result of the combined effects of climatic factors, significant structural changes occur in the surface layer (surface erosion). These changes are denoted by the term weathering. This is impact on the aesthetic appearance of the product and the quality of protective coatings. The water plays an important role for wood destruction. The weathering could be minimizing with surface treatment. These treatments can be performed both with soaking up funds forming protective and decorative coatings. The function of these coatings is to receive and minimize external impact and thus extended to life of articles, therefore increase their durability. It is perform an analysis of adhesion of protective and decorative coatings, formed on building wooden products, water-thermal cyclic treated. It is established that the adhesion decrease after water-thermal treating. It is establish that the water penetrates through to the coats distort its adhesion to wood surfaces. It is made recommendation about the conduct of appropriate activities for coating refresh.
Ключови думи: wood elements, protective coats, building products; water-thermal treatment