Many of the apartments have ‘table-top’ balconies, constructed in galvanised steel for strength and longevity. Galvanized steel requires a series of additional pre-treatments in order that the final coating can offer full protection for the metal from corrosion and abrasion. The client recognised the advantage of Powdertech Corby’s one-stop-shop service for galvanized mild steel, with galvanizing, fettling, pre-treatment and final coating all handled by the company.
“We worked closely with the client, ensuring that their exacting standards were met at all times,” said Richard Besant, Director, Powdertech Corby. “We use a chrome-free 8-stage silane process with all processes separated in an 11-tank system. De-ionised water rinses separate each of the three critical stages. Our preparation process also includes specialist “degassing” before powder coating which forces out any moisture within the zinc layers which could cause pin-holing. This ensures that all surfaces are covered smoothly and evenly.”
In total 30 tonnes of steel, as balcony bases, balustrade and support posts were fully prepared and then powder coated in RAL 9005 satin black, a Valspar/Sherwin Williams powder. The high-quality finish will enable the metal to withstand all weather conditions, maintaining a smooth and attractive appearance and requiring minimal maintenance.