The furniture component supplier Kesseböhmer has changed the iron phosphating process over to a more economical and more environmentally friendly passivation variant and hence permanently optimised the pretreatment process. The result is improved paint adhesion, a smaller quantity of sludge accumulating and a working temperature corresponding to the ambient temperature.
For some years now, the company KIESOW DR. BRINKMANN has, with its passivating agent SURFASEAL 440, been showing in various applications and sectors of industrial varnishing how aluminium, steel and zinc surfaces can be passivated chromium and phosphate-free before varnishing. The passivation specially conceived for aluminium, steel and zinc surfaces is free of chromium, nickel, cobalt, molybdenum and phosphates and can be used both in spraying and in dipping processes.
In the application improved adhesion of the paint as compared with the iron phosphate coatings, a process bath with little sludge, a short exposure time (1 minute) as well as simple and environmentally friendly disposal. Moreover, low working temperatures (20 to 40°C) are possible. The process bath and the coatings produced are analysable.