If I use copper tubing, what is the best and lowest maintenance way to prevent long-term corrosion from weather?
Md Ariful Islam
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Dr. Md Rushad Rahman
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Copper has its own corrosion resistance called "Patina". If you've ever seen green metal roofing, soffit or rain gutters, that's what this is. If you don't like either look and you want the reddish bright copper, you'll need to protect it from oxygen. A spray shellac or clear coat varnish with several coats will temporarily inhibit oxidation. Look for a product with UV stabilizers as sunlight tends to quickly break down most of these, especially water-based products.
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