Eucalyptus wood treatment and leaching behavior of CCB (Chromated Copper Borate): a field test in Brazilian Midwest

The use of Chromated Copper Borate (CCB) for wood treatment is known with several studies on a laboratory scale. However, there lack field to analyze the effect CCB over time. This study aimed evaluate properties Eucalyptus urophylla S.T. Blake x grandis W. Mill ex Maiden (called E. urograndis), treated as well leaching chromium, copper and bore (Cr/Cu/B) in test. experiment, untreated (no application), was installed 2016 remained until 2018. Wood physico-mechanical were evaluated each condition (treated untreated) at three different time: 0, 1 2 years exposure. elements losses (leaching) determined by difference quantification element retained (retention), from year 0 (amount original elements) relation preservative urograndis efficient maintain its physical mechanical (mass loss, basic density, rupture elasticity modulus) during without showed reductions physical-mechanical properties, indicating their low natural durability. High (close 100%) boron observed. In addition, total retention has not changed (statistically) after years.