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Determination of metal corrosion in wood treated with new-generation water-borne preservatives

Can Ahmet, Sivrikaya Hüseyin, Taşcioğlu Cihat

Drewno : prace naukowe, doniesienia, komunikaty

2020

vol. 63, nr 205

59--68

In this study, the corrosion performances of ammonium copper quaternary (ACQ) and boric acid (BA) wood preservatives were investigated, with micronized copper quaternary (MCQ) and nano boron (NB) used as reference materials. In the study, Scots pine (Pinus sylvestris L.) wood samples were impregnated according to the full-cell process method with ACQ at 2.4% concentration, BA at 4% and MCQ and NB at 1%. The ACQ- and BA-impregnated samples were then impregnated for a second time using five different water-repellent materials: tall oil, linseed oil, sodium silicate, methyl hydrogen silicone and N'-N-(1,8- naphthalyl)hydroxylamine. Polyethylene glycol (PEG) 600 and aluminum sulfate were introduced as single impregnations in the form of homogeneous mixtures with ACQ and BA. The corrosion properties of the impregnated and control samples, including metal weight loss (MWL) and corrosion depth, were examined. The MWL values of the ACQ-impregnated samples showed an increase compared to the control group. The MWL values of the MCQ-impregnated samples were lower than those of the samples impregnated with ACQ, whilst the MWL values of the BA-impregnated samples were higher than those of the samples impregnated with NB.

Weathering performance of a wood surface coated with acrylic resin containing UV absorber

Ozgenc O.

Drewno : prace naukowe, doniesienia, komunikaty

2017

vol. 60, nr 200

35--49

This study examines the effects of a 15-month natural weathering test (Uzungöl and Hıdırnebi Plateaus) on wood materials. In this study, samples of oriental beech (Fagus Orientalis L.) and Scots pine (Pinus sylvestris L.) with six different protection methods were used. The roughness increase, colour and visual- -macroscopic changes occurred on the surfaces of treated and untreated wood samples, exposed to outdoor conditions, were compared. The impregnation and heat-treated oriental beech and Scots pine were coated with acrylic resin containing UV absorbance. The results showed that the coating system increased the visual and physical performance of wood samples in outdoor conditions.