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Corrosion protection for 6063/6060-T5 aluminum tubes for hot household water

What would be the best solution to provide corrosion protection for 6063/6060-T5 aluminum tubes/hollow shapes with internal ribs for hot (up to 90 °C) hard tapped household water environment? Would PTFE immersion coatings be appropriate or recommended? Is it possible to coat the internal surface only (by masking an external surface)?

Anton Vorobiev
aluminum systems design - Jerusalem, Israel
2004

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