CCA TREATMENTWoodchem poles are treated using CCA (Chromated Copper Arsenate)
1) Copper and Arsenic– to protect against fungal decay and wood boring insects.Both are fungicides. Copper is a primary fungicide & Arsenic is a secondary fungicide. Both have different fungicide properties, hence combating any known form of attack.No decay can hence occur.
2) Chromium—it acts as a lock..to fix the preservative to the cell structure in the wood.It locks the copper & arsenic into the wood.
Chromium is essential to allow CCA to penetrate deeply into the wood, and for arsenic and copper to form permanent bonds with the wood.
The CCA is impregnated into the wood using a vacuum & pressure cycle.This involves a pressure cylinder.
The process takes 4hours,that ensures a maximum penetration of the chemical into the sup wood. Standards require 20mm/2inch from the pole outer.(sup wood)
All Woodchem poles meet the relevant Kebs specification and standards, against pest, insect & fungal infestation
It has a service life of up to 10yrs + or -, although CCA treated wood can last for 40 years and longer. It depends with the subjected conditions.
CCA was invented in 1933 by Dr. Sonti Kamesam, an Indian scientist, and was awarded its first patent (British) in 1934