The VIANT® coating system developed by Chemetall several years ago is now being used on an industrial scale in a number of production plants.
In co-operation with Chemetall/BASF, RIPPERT has built the largest coating plant for VIANT® to date, in which workpieces with the highest demands on corrosion resistance, edge protection and comprehensive wrapping are coated. Throughputs of up to 500 m²/h are achieved here and beams with dimensions of 6500 x 3200 mm and a mass of 3.6 tonnes are coated. This system can be applied to degreased steel substrates with a resistance of 504 h as well as to classic zinc phosphating with results of > 1000 h DIN 9227 salt spray exposure. As the ‘wrap-around’, the internal coating of the workpieces, is not dependent on the penetration depth of the DC voltage applied, but instead forms a film by releasing iron ions from the substrate, the wrap-around is infinite and the entire workpiece is coated from the inside and outside.
Typical elements of a CDC system, such as a DC power supply, anolyte circuits, high circulation rates with large circulation pumps and tight temperature controls are not necessary with the VIANT® coating system and reduce investment and operating costs. With smaller throughputs, it is even possible to dispense with ultrafiltration, which differs from VIANT® in terms of the membranes, the circulation system and the pumps used.
If you are interested, the experts from RIPPERT and Chemetall/BASF will be happy to help you
Cedric Daut (RIPPERT), +49 5245 901-262, www.rippert.de
Simon Schöps (Chemetall/BASF), +49 173 3026011, www.viant-coating.com/contact/
