The complete "4-in-1" solution for chrome plating
The new HelioChrome® Rapid EC from K.Walter revolutionizes the chromium plating of gravure cylinders
“4-in-1”: This is the key advantage of the new HelioChrome® Rapid EC. The essential additives – which previously had to be added for various effects – are now included in the product. Things couldn’t be any simpler or safer.
Only K.Walter offers this kind of complete product. For optimum composition of the chromium layer, various additives were previously added to the bath. Dosing errors could not be ruled out. Now that additional additives are unnecessary, HelioChrome® Rapid EC – in addition to its user-friendly handling – offers consistently stable results. This also eliminates the need for the formerly used lead anodes – a further decisive advantage.
HelioChrome® Rapid EC is based on chromic acid and includes the well-known additives HelioChrome® Rapid Catalyst, HelioChrome® Wetting Agent FF and HelioChrome® REOX3. These three components are responsible for various galvanic effects.
The HelioChrome® Rapid Catalyst supports electrolysis to give the chromium layer maximum stability. Specifically, hardness, roughness and microcracks are steered into the respective optimum ranges. Thus, the range for the desired corrosion-resistant microcracks is most favorable between 300 and 600 cracks per cm.
HelioChrome® Wetting Agent FF is a PFOS*-free wetting agent that can reduce the surface tension of the electrolyte from over 70 mN/m to less than 30 mN/m. “FF” stands for “foam-free”. Under normal conditions, the formation of gas bubbles and thus of surface foam and spray mist is negligibly minimized. This is advantageous because it considerably reduces the chromium content in the exhaust air and lessens the risk of hydrogen depletion. And since the electrolyte spreads much more, the system is easier to clean; there is hardly any carryover. At the same time, greater contamination of the chromium plating bath is avoided, which saves cleaning effort and protects the system hardware.
HelioChrome® REOX3 – which controls the trivalent chromium in the electrolyte – is the decisive component for electrolysis without lead anodes. This is extremely welcome from the point of view of occupational health and safety because operators no longer have contact with the previously used lead anodes, i.e. they no longer need to clean them.
*) PFOS = perfluorooctane sulfonate, an anionic surfactant of perfluorooctanesulfonic acid incorporated into Annex B of the Stockholm Convention in May 2009; i.e. PFOS, PFOA and corresponding derivatives may no longer be used as wetting agents for hard chromium plating in controlled electroplating systems since 08/26/2015 (except in closed systems).