The effect of post-treatment procedures that more rapidly precipitate copper, zinc, and arsenic in douglas-fir treated with ammoniacal copper zinc arsenate (ACZA) on subsequent leaching resistance were investigated at two retentions (6.4 and 40 kg/m3). Total leaching was greater from boards treated to the higher retention. At both levels, copper was lost at the highest rate. Post-treatment processing had no consistent effect on leaching losses indicating that accelerating precipitation of ACZA does not change its long term sensitivity to loss from the wood when placed in aquatic exposures.

Download document (78 kb)
free for the members of IRG. Available if purchased.

Purchase this document