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
Indeed, EPA awarded Chemical Specialties of Charlotte, N.C., its 2002 Presidential Green Chemistry Challenge Award for developing 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.
Her colleague, Dave Mason, director of treated products with the SFPA, adds that alternative wood treatments such as alkaline copper quaternary
(ACQ) can be used instead of CCA-treated wood, with similar durability.
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).
Copper toxicity may also be reduced in some copper tolerant fungal species in presence of a nitrogen source, e.g., increased ammonia in alkaline copper quaternary
(ACQ), and this is attributed to stimulation of oxalic acid production (Ruddick and Xie 1994, Humar et al.
Worldwide, several alternatives to CCA-preserved wood exist, including copper citrate, ACQ (alkaline copper quaternary
ammonium salts), copper HDO (bis [N-cyclohexyl-diazeniumdioxy] copper), and copper azole.