Corrosion Zones

A guide to New Zealand Corrosion Zones

This guide assists you to select the appropriate powdercoating for the design location.

There are few places in New Zealand that are not affected by sea laden winds that traverse our narrow landmass. All aspects of building design are thus influenced, and good building design necessitates choosing appropriate products.

Corrosion Zone	Zone Description	Powder Type - minimum	Powder Type - Recommended
Sea Spray Extreme	<10 metres from the shore line	Super Durable Fluoropolymer Coating	Super Durable Fluoropolymer Coating
Sea Spray	<100 metres from the shore line	High Durability Powdercoating	High Durability Powdercoating
Zone 1	Coastal area that are not deemed "sea spray" but are still a marine environment	Extra Durable Powdercoating	High Durability Powdercoating
Zone 1	Coastal areas that are not spray zone and benign	Extra Durable Powdercoating	Extra Durable Powdercoating
Zone 2	Inland coastal areas that would normally lie between Costal and Hill country	Extra Durable Powdercoating	Extra Durable Powdercoating
Zone 3	Inland New Zealand, typically Hill country where rainfall is plentiful	Extra Durable Powdercoating	Extra Durable Powdercoating
Zone 4	Geothermal areas. Other areas to be included in this zone would be swimming pools, polluted and high corrosion risk areas.	High Durability Powdercoating	Super Durable Fluoropolymer Coating

Definitions:

Extra Durable Powdercoating	High Durability Powdercoating	Super Durable Fluoropolymer Coating
(Extra Durable) Conforms to AAMA2603	(High Duty) Conforms to AAMA2604	(Super Duty) Conforms to AAMA 2605