To address this need an aboveground decking exposure test of copper azole type B (CA-B) and alkaline copper quaternary ammonium carbonate (ACQ-D) was initiated in 2004 at two locations in Canada to represent conditions typical of coastal (Maple Ridge, British Columbia) and continental (Petawawa, Ontario) climates.
Table 4--Retention in alkaline copper quaternary carbonate formulation (ACQ-D)-treated deck boards.
Weight loss studies of fastener materials corrosion in contact with timbers treated with copper azole and alkaline copper quaternary
The agency said that replacing CCA with alkaline copper quaternary
is "one of the most dramatic pollution-prevention advancements in recent history.
The termite resistance of this material was compared with that of a standard high-loading disodium octaborate tetrahydrate (DOT) pressure treatment and a reference preservative, alkaline copper quaternary
type D carbonate (ACQ-D).
Preserve's preservative is alkaline copper quaternary
, or ACQ.
This action comes in response to the increase in demand for its new generation alkaline copper quaternary
(ACQ) wood preservative.
Specific examples are shown comparing the reduction in lateral capacity as a function of time for corrosion rates measured for untreated, alkaline copper quaternary
(ACQ)-treated, and CCA-treated wood.
Didecyldimethyl ammonium chloride (DDAC) and benzyldodecyldimethyl ammonium chloride (BAC), which are commonly used as components of alkaline copper quaternary
wood preservatives, can react with both lignin and cellulosic compounds of wood cells and have some resistance to leaching (Jin and Archer 1991).
Lumber is now treated with either alkaline copper quaternary
(ACQ) compound or copper azole (CA; American Wood Protection Association [AWPA] 2008a).
increased ammonia in alkaline copper quaternary
(ACQ), and this is attributed to stimulation of oxalic acid production (Ruddick and Xie 1994, Humar et al.