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.
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