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Since CCA is also copper-based, why has there been no corrosion problems with the CCA treated wood?

April 26, 2017CCA copper-based Corrosion problems treated wood

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Since CCA is also copper-based, why has there been no corrosion problems with the CCA treated wood?

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Although CCA contains copper, it has other chemical components (chromate and arsenate) that are corrosion inhibitors. The inhibitors protect the zinc galvanizing layer from corrosion in the presence of copper.