The performance of varnishes applied to wood will depend on the way in which its surfaces have been prepared. Sanding has traditionally been used to prepare surfaces prior to coating. This process is one of the most expensive operations in woodworking, which produces a high level of wood dust. As a result, other surfacing processes are actually studied as alternatives to sanding for wood finishing. The effects of two alternative processes, oblique cutting and helical planing, on surface properties and coating performance of red oak wood were thus studied. Surfaces were prepared using three oblique angles (oblique cutting) and three wavelengths (helical planing) before application of an interior solvent-borne coating. Surface properties were examined by roughness parameters, scanning electron microscopy micrographs, wetting behavior, and surface energy. Coating performance was assessed by pull-off tests on aged and un-aged specimens. Oblique and helical planed surfaces at the highest oblique angle and wavelength, respectively, presented micro-torn grain, a certain level of micro-fuzziness, and higher roughness. Oblique-cut surfaces were more wettable than helical-planed surfaces. The wettability of machined surfaces decreased with increasing surface roughness within each process. Despite oblique samples had shown lower values of pull-off strength prior to aging treatment, these surfaces had statistically similar pull-off strength to those of helical-planed specimens after aging. As a result, the latter surfaces had higher loss in adhesion after accelerated aging. Results suggest that the use of oblique angles of 15° and 35° should provide a better coating performance in oblique-cut surfaces. On the other hand, no significant differences were detected between wavelengths during helical planing with respect to coating performance. Thus, a low (1 mm) or high wavelength (2.1 mm) could be used, depending on whether smoothness or productivity are required, in order to reduce sanding dependence for finishing red oak wood.

中文翻译：

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通过两种替代表面处理方法制备的红橡木木材上的溶剂型涂料性能

应用于木材的清漆的性能将取决于其表面的制备方式。传统上，打磨已用于在涂覆之前准备表面。该过程是木工中最昂贵的操作之一，会产生大量的木屑。结果，实际上已经研究了其他铺面工艺，以替代用于木材精加工的砂光。因此，研究了斜切和螺旋刨两种替代工艺对赤栎木材表面性能和涂层性能的影响。在施加内部溶剂型涂料之前，使用三个倾斜角（倾斜切割）和三个波长（螺旋平面）准备表面。通过粗糙度参数，扫描电子显微镜显微照片，润湿行为，和表面能。涂层性能通过老化和未老化试样的拉拔试验进行评估。在最高倾斜角和最大波长处的倾斜和螺旋平面分别呈现出微撕裂的晶粒，一定程度的微模糊性和较高的粗糙度。斜切表面比螺旋平面更易润湿。在每个过程中，机加工表面的润湿性会随着表面粗糙度的增加而降低。尽管倾斜样品在时效处理之前显示出较低的剥离强度值，但这些表面在统计学上与时效后的螺旋平面样品具有相似的剥离强度。结果，后一表面在加速老化之后具有更高的粘附力损失。结果表明，使用15°和35°的斜角在斜切表面上应提供更好的涂层性能。另一方面，在螺旋刨光过程中，关于涂层性能，没有发现波长之间的显着差异。因此，取决于是否需要光滑度或生产率，可以使用低（1mm）或高波长（2.1mm），以便减少用于完成赤栎木材的打磨依赖性。