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Galvanizing and powder coating of Lighting Poles

Please give me information regarding the advisable thickness to be used in a lighting poles used externally, especially in Airports, which can be tubular or octagonal and can be one or two sections depending on heights. Is galvanizing thickness requirement can be used as pattern, (610 g/m2), to be followed in powder coating. Thanks.

Oliv Arpat
Architect - Dubai, United Arab Emirates
February 3, 2009

If you follow ISO 1461, then you should be specifying a thickness not less than 85 microns.
If the galvanizing is to be followed by powdercoating, you should specify that they do this to a standard such as ISO 13438, and that will include a competent pretreatment between galvanizing and powdercoating. It might be a zinc phosphate, or a chromate pretreatment. If the powdercoater suggests any pretreatment of fewer that say 5 stages (including rinses) then go elsewhere.

Geoff Crowley
Crithwood Ltd.
Westfield, Scotland, UK

February 6, 2009

adv.
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