Galvanizing treatment as a method to protect tools used in teaching processes. This paper presents the use of zinc coating applied on surfaces of wood machining tools - exhibits in teaching processes. Analyses were conducted to determine resistance of applied coatings to the action of various environments, which in an accelerated manner assessed suitability of coatings as a method of tool protection, mainly in terms of their contact with users. Very advantageous effects of zinc coating application were observed in the analyzed variant. Galvanizing processes and the resulting coatings made it possible to identify defects in the material structure of the tools, being the most frequent results of intensive operation and wear.
Influence of pine wood (Pinus syhestris L.) thermal modification on the withdrawal force of screws. In the study the force required to withdraw the screw from thermally treated pine wood was examined. Modification of pine wood was performed at a temperature range of 150 - 180°C. It was concluded that the process of wood modification does not significantly affect the force needed to pull a screw out, and therefore also the withdrawal capacity and the ability to maintain the screw. In the case of 3.5 x 35 mm and 4.0 x 35 mm screws, the withdrawal capacity constituted respectively 63% and 50% of the ability to maintain the screw.