The VIANT system developed by Chemetall/BASF 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 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), 0170 8396189, www.rippert.de
Simon Schöps (Chemetall/BASF), 0173 3026011, www.viant-coating.com/contact/
