Bibliographic Details
| Title: |
EFFECTS OF ARTIFICIAL WEATHERING ON THE SURFACE PROPERTIES OF COATED RADIATA PINE. |
| Authors: |
Sahin, Sirri1, Esteves, Bruno2, Can, Ahmet3, Sivrikaya, Hüseyin3, Domingos, Idalina2, Ferreira, José2, Ayata, Ümit4 umitayata@bayburt.edu.tr |
| Source: |
Maderas: Ciencia y Tecnología. 2023, Vol. 25 Issue 1, p1-14. 14p. |
| Subject Terms: |
*SURFACE properties, *PINUS radiata, *WEATHERING, *SURFACE coatings, *WOOD, *TEST methods |
| Abstract: |
Radiata pine boards were coated with two different methods A and B both beginning with a hydro primer and finishing with a mat oil but method A using an acrylic high gloss coating and method B three layers of an acrylic sealer in between. The samples were subjected to aging processes for 144 h, 288 h, and 432 h by using UV-A 340 nm lamps. The CIE L*a*b* and CIE L*C*H* coordinates were determined (L*, a*, b*, C*, ho*, ?E*), gloss (perpendicular () and parallel (//) to the grain at 20°, 60°, and 85° angles) and surface adhesion strength via the pull-off method were tested before and after weathering. Results have shown that lightness (L*), decreases with weathering for both varnish applications with a higher decrease for the B coating system. Redness increased for both applications with no significant differences. At the same time there was a yellowing of the samples along the weathering period. Parallel and perpendicular gloss decreased for 20° and 60° angles while it increased for 85° angle. The adhesion strength of method A was higher and its decrease with weathering was smaller than for method B. Both varnish applications have proven to confer some protection against wood discoloration, but method A showed the best results and is therefore the best method to be used by radiata pine. [ABSTRACT FROM AUTHOR] |
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