Some colors of powder applied over zinc plating and chromate sealer have withstood over 100 cycles in the harsh Kesternich Corrosion Chamber before any signs of red rust appear. One cycle is 8 hours in the corrosion chamber and 16 hours outside it. Wet paint applied over zinc plating and chromate sealer have withstood over 30 cycles before any signs of red rust. ST Fastening Systems has worked for years with powder manufacturers, to develop an impact resistant powder coating that is formulated to color match and has a UV (ultraviolet) inhibitor that resists chalking and fade typical with metal panel coatings. Powder coverage is uniformly applied to the fastener head and washer, and its hard shell finish resists cracking or scratching. The standard colors included are color matched to the high volume metal panel colors available today. All powder is analyzed at the ST Fastening Systems Technical Lab for proper matching to those metal panels.
The Resulting Benefits to the Customer
√ Exceptional corrosion resistance.
√ Conventionally electroplated and painted fasteners will normally resist the corrosion effects of Kesternich testing for 15- 20 cycles. ST Fastening Systems’s powder finish applied over mechanically plated fasteners easily exceeds 80 Kesternich cycles.
√ST Fastening Systems’ powder finish outperforms the conventional dip-spin applied wet coatings.
√ Excellent color matching to industry standard colors. Colors are formulated at the powder manufacturer to specified industry color standards. Colors are again analyzed at ST Fastening Systems using special color analyzer to assure exact matching to the specified standard color as another step in ST Fastening Systems’s Quality Assurance procedure. This assures reproducibility of colors from one manufacturing lot to another.
√ Superior weathering characteristics.
√ Powder is formulated to provide the color retention, chalk: resistance, and fade resistance expected of the finished building panels.
√ Excellent film hardness. ST Fastening Systems’ powder coated fasteners resist scratches and damage during shipping better than conventionally applied wet paints. The overall toughness and heavier coating thickness of the powder finish provides excellent resistance to the abuses of normal installation.