Bridges

Many Bridges worldwide have been metal sprayed for corrosion protection. New Zealand is at the forefront of using the Metal Spray technology with the production of various guides:

• AS/NZS 2312:2002(1) “Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings”.
• NZS 3404.1:2009(2) “Steel structures Standard – Part 1: Materials, fabrication, and construction”.
• HERA Report R4-133:2011(3) “New Zealand Steelwork Corrosion and Coatings Guide”.

New Zealand's Transport Agency published "Protective Coatings for Steel Bridges" (2014), a guide for Bridge and Maintenance Engineers, stating that metal coatings on bridges can give up to 40 years of protection until first maintenance.

New Zealand has many bridge applications including the Auckland Harbour Bridge, NZ (1958) and the Taranaki Footbridge, NZ (above). Other bridges that have been coated around the world include, but are not limited to, The Pierre-Laporte Suspension Bridge across the St Lawrence near Quebec, Canada (where from 1977-79 some 165,000m² was coated after failure of the original paint system over a six year period), Humber Bridge, UK, The Bosphorus Bridge, Turkey, Tsing Ma Bridge, Hong Kong and The Clifton Suspension Bridge, UK.