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Gewählte Master / Diploma Thesis:

Monika Ecker (2016): Prediction of Colour Development of Coated Wood Surfaces during Weathering and Maintenance.
Master / Diploma Thesis - Institut für Holztechnologie und Nachwachsende Rohstoffe, BOKU-Universität für Bodenkultur, pp 72. UB BOKU obvsg

Data Source: ZID Abstracts
Abstract:
The colour of coated wood surfaces changes due to the influence of weathering. Rainfall, hail and mainly the sun with its aggressive UV radiation affects the performance of coatings enormously. Facades and wooden windows are often coated with transparent or pigmented coatings to protect the wood against exterior influences. But although most of the used coatings comprise special UV-protection additives, maintenance of these elements after a few years of usage is required. The maintenance intervals are dependent on the types of pigments, the thickness and UV-stability of the coating material and also on the geographic position of the wooden elements. The aim of this master thesis is to develop a prediction model of the colour change on coated wood surfaces caused by UV radiation and maintenance. Therefore artificial radiation tests were performed with the most treated wood species for outdoor use in Europe such as Spruce, Larch, Oak and Meranti coated with 3 different pigmented coating systems (yellow, light brown and dark brown). As a result a basic prediction model, based on 2 different mathematical calculation options (by bi-exponential or asymptotic function) was created to predict the discolouration on Larch wood over a specific time span also including maintenance.

Beurteilende(r): Teischinger Alfred

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