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We require a coating to replace hot dip galvanising

January 20, 2010

We are a manufacture of resistance welded wire mesh fencing panels that are currently produced from commercially galvanised wire (galvanised prior to the welding process). We are investigating alternative coating technologies that would allow us to manufacture panels from uncoated or self-colour wire, which can be coated after the welding process with a highly corrosion resistant finish (using pre-galvanised wire does not give any corrosion resistance on the cut ends of the wire or around the weld area).

Our products are large in size; varying from 1000 mm (40") x 2500 mm (100") to 3000 mm (120") x 3000mm (120") and are produced in volumes of 500,000 pieces per annum.
The new coating will have to be:-
Smooth
Offer approx. 1000 hours salt spray test results
Be compatible with Polyester Powder coating
Cost competitive

Neil Sutcliffe
manager - Brighouse, W Yorkshire, England

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Have you considered galvanizing after welding/assembly of the fence? you would then be looking at 3000 hours ASTM ASTM B117 or 25 years plus weathering if you add polyester powder coating.

Terry Hickling
Birmingham, United Kingdom
January 24, 2010

YOU MAY CONSIDER ZINC PLATING WITH GOOD THICKNESS AND LACQUER COAT. HOT DIP GALVANISING AFTER WELDING AS SAID EARLIER IS ALSO POSSIBLE.

DR. DIPANKAR SEN
- West Bengal, INDIA
February 7, 2010