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In addition to broad efficacy against decay fungi and wood-destroying insects, its low mammalian toxicity is a key reason why copper naphthenate has gained market acceptance as a proven effective wood preservative that is specified and used extensively for environmental reasons by utilities and railroads as a less toxic alternative to creosote ...
Apart from structural wood preservation measures, there are a number of different chemical preservatives and processes (also known as timber treatment, lumber treatment or pressure treatment) that can extend the life of wood, timber, and their associated products, including engineered wood. These generally increase the durability and resistance ...
Wood products treated with ACQ preservative were commercially produced in Canada for the first time in 2004. [ 4 ] [ 1 ] ACQ became a widely used wood preservative after concerns were raised about possible environmental contamination by chromium and arsenic from wood treated with chromated copper arsenate (CCA), through contact (especially in ...
Chromated copper arsenate (CCA) is a wood preservative containing compounds of chromium, copper, and arsenic, in various proportions. It is used to impregnate timber and other wood products, especially those intended for outdoor use, in order to protect them from attack by microbes and insects. Like other copper-based wood preservatives, it ...
The five common chemical agents that damage wood are: Light – Creates a chemical reaction within the cell walls of wood, leading to a change in color or texture; Acids – Cause wood to become brittle. Alkalies – Cause the fibers of the wood to separate and break down. Salts – Similar to alkalies, salts break down the fibers of wood.
Preservatives work by making the food source inedible to these organisms. Properly preservative-treated wood can have 5 to 10 times the service life of untreated wood. Preserved wood is used most often for railroad ties, utility poles, marine piles, decks, fences and other outdoor applications.