New Zealand Standards pertaining to coated wire will undergo revisions/amendments from time to time. Here we provide links and a summary to the updated revisions or amendments.
NZS 3471:1974 - Specification for Galvanised Steel Fencing Wire
As the only 100% New Zealand made fencing wire manufacturer, Pacific Steel have over 50 years’ experience in producing a high quality product developed for our local market. Our wire is based on the 1974 fence wire Standard (NZS 3471:1974), which covers pure zinc coatings. Pacific Steel have since incorporate an improved alloy coating system for all our WIREMARK® wire.
WIREMARK® zinc-aluminium fencing wires are coated utilising 95% zinc and 5% aluminium alloy coating. The zinc-aluminium alloy improves upon the renowned protection of hot-dip galvanised coatings, with the aluminium component enhancing the anticorrosion performance of the coating by making it more weather resilient.
The grey oxide layer formed on zinc-aluminium coated wire is more durable than the softer, white layer formed on pure zinc. This oxide layer itself acts as a barrier, slowing corrosion of the zinc-aluminium alloy.
Independent research company, Materials Innovations, have conducted testing of various coatings with the performance of galvanised wire and zinc-aluminium alloy wire showing that galvanised coating corroded at about four times the rate of the zinc-aluminium wire in salt spray tests.
AS/NZS 4534:2006 - Zinc and zinc/aluminium-alloy coatings on steel wire
Published in 1998, and revised in 2006, the AS/NZS 4534 Standard specifies the requirements for zinc and zinc/aluminium-alloy coatings on steel wire and fabricated wire products.
All our zinc-aluminium wire, including WIREMARK® fencing wire, is manufactured to meet this joint Standard.
Information contained on this page is current as of July 2016.
All Standards are available for purchase from the Standards New Zealand website www.standards.co.nz.