Alu-zinc is a aluminium-zinc coated steel sheet that can be used unpainted up to corrosive class C3. The coating alloy consists of:
The name AZ150 indicates the coat weight of 150 g/m2 per double side.
The surface has been treated with SPT (Surface Protection Treatment) to prevent stains during handling and to ease shaping.
The surface is initially glossy metal with a rose pattern but after some time it turns greyish, and eventually it becomes matt grey.
Normally, the trimmed edges do not need to be painted but in corrosive environments in which the trimmed edges are aesthetically prominent a protective paint is recommended to be applied.
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