Corrosion-resistant aluminium composite material

摘要

The corrosion-resistant composite material has a cathodic core layer and a thin anodic cladding. The two layers each consist of an aluminium alloy and are bonded metallurgically. The core material contains 0.5-3% of magnesium, 0.3-1% of manganese and 0.1-0.3% of chromium. The cladding material contains 0.2-1.5% of manganese and 0.03-0.3% of silicon. The depth of the pits is largely limited to the thickness of the cladding. The composite material is used especially for manufacturing piping for heat exchangers.