55%
Al-Zn coated steel has an alloy coating of aluminium (Al) and zinc (Zn)
applied by a hot-dip process on a continuous metallic coating line.
The unique composition of the coating creates a product with outstanding
corrosion resistance. 55% Al-Zn is showing some of the fastest sales
growth of any metal in construction: annual global production is now
over 4 million tonnes, with some 500,000 buildings a year using the
material.
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Skyward surface appearance of galvanised and Al-Zn alloy coated sheets after 18-year atmospheric exposure in various environments (original panel size approximately 10cm x 15cm)
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| Galv | 4% Al-Zn | 7% Al-Zn | 55% Al-Zn | |
| Severe Marine |
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| Moderate Marine |
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| Industrial | ||||
| Rural | ||||
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The brown tones indicate rusting levels. |
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