0.12-1.5 mm DX51D+Z60 Z275 galvanized steel coil

Zinc Coating Surface Finish

The following surface finishes may be ordered to suit specific end-use requirements:

1. Normal or Regular Spangle

This finish is obtained during normal solidification of a hot-dip zinc coating on steel sheet, and results in the formation of a coating which exhibits either no spangle or zinc crystals of different sizes and brightness depending on the galvanizing process and conditions. If the end user require a heavier coating (Z450 or Z600), there is a distinct tendency for the coating to develop very visible sag lines and ripples that results in a rough surface. However, the solidified zinc appearance has no effect on either the quality or corrosion resistance of the coating. Normal or Regular spangle is supplied for a wide range of applications where over-painting for maintenance purposes may be undertaken at a later stage.

2. Flattened Minimized Spangle

This zinc coating finish is obtained by restricting the normal zinc crystal growth followed by the application of a skin pass process. The zinc coating thus obtained has improved formability and the zinc surface serves as an excellent base for pre-painting, post – painting and powder coating applications. This finish is recommended for applications where a high gloss paint finish is required. It is available for zinc coating of mass up to Z275, and a maximum material thickness of 1.20 mm if passivation is required, or a maximum thickness of 1.60 mm if passivation is not required.

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