Coatings for Use on Wooden Bicycle Frames – Applicability, Test Methods and Artificial Weathering Results

Autor: Fabian Wulf, Moritz Sanne, Alexander Pfriem
Jazyk: angličtina
Rok vydání: 2017
Předmět:
Zdroj: Drvna industrija
Volume 68
Issue 4
ISSN: 1847-1153
0012-6772
Popis: Seven different coating systems were tested regarding their suitability for application on bicycle frames made of wood. Since bicycles are ridden throughout the year, the coating system has to withstand different outdoor climate conditions and, especially in winter, the salt brines from the roads. For this reason, an artificial weathering test with an additional freezing step was performed, followed by a specially developed salt brine spray test in ambient outdoor winter climate. Another focus was on the applicability of the coatings. For the tests, a range of coatings, originally developed for wooden front doors, floors and for boat building, was selected. These coatings were expected to meet the main requirements for UV radiation - permanence, weather resistance and saltwater firmness. The main constituents of the coatings were water-based polymer dispersions, two-component polyurethane systems or synthetic and natural oils. The layer thicknesses of the coatings, as well as colour and gloss data of the specimens, were recorded and rated. The adhesion capability was examined by carrying out a cross-cut-test. Surface damages were observed visually. It turned out that colour and gloss change served as good indicators for the decay of the coating. Three different coatings passed the accelerated weathering test. Salt spray had no significant effect on any of the coatings.
U radu se prikazuju rezultati istraživanja prikladnosti sedam različitih premaznih sustava za drvene okvire bicikla. Budući da se bicikl vozi tijekom cijele godine, premazni sustav mora izdržati različite vremenske utjecaje te, posebice zimi, utjecaj slane vode s cesta. Stoga je provedeno ispitivanje premaza nakon simuliranog izlaganja vremenskim utjecajima s dodatnom fazom zamrzavanja, nakon čega je proveden posebno razvijeni test utjecaja otopine soli na premaz u vanjskim zimskim uvjetima. Drugi fokus bio je na načinu nanošenja premaza. Za istraživanje je odabran niz premaza, izvorno razvijenih za ulazna drvena vrata, podove i brodogradnju, za koje se pretpostavilo da će udovoljiti glavnim zahtjevima za UV zračenje – da će biti trajni, otporni na vremenske uvjete i otporni na utjecaj slane vode. Glavni sastojci premaza bile su polimerne disperzije na bazi vode, dvokomponentni poliuretanski sustavi ili sintetička i prirodna ulja. Zabilježena je i ocijenjena debljina sloja premaza te podaci o boji i sjaju uzoraka. Adhezivnost je ispitana metodom zarezivanja mrežice na premazu. Oštećenja površine vizualno su opažana. Pokazalo se da promjena boje i sjaja može poslužiti kao dobar pokazatelj propadanja premaza. Tri različita premaza prošla su ispitivanje ubrzanog izlaganja vremenskim utjecajima. Slani sprej nije imao znatniji učinak ni na jedan od premaza.
Databáze: OpenAIRE
Externí odkaz: