Sinter Surface Solutions
Sintered materials must be impregnated before they are plated. The reason is that due to their sponge-like structure, sintered metallurgical components frequently absorb the liquid used during the finishing process, and gradually release them later (so-called “bleed-out”). This frequently results in salts being deposited on the surfaces of galvanic plating such as zinc and zinc alloy processes. The mainly alkaline substances then attack the metal plating, leaving behind localised corrosion damage and/or visual imperfections.
Solution with added value
With Sinter Surface Solutions, the Holzapfel Group has developed a process which reliably prevents the defect that causes bleed-out. The all-in-one solution comprising impregnation and coating was awarded the “Surface 2012 in Silver” prize by the Fraunhofer Institute for Manufacturing Engineering and Automation (IPA). The process also received the Leipzig Galvanic Prize 2013 from the DGO regional groups of Saxony and Thuringia.
The automotive industry (e.g. transmission parts (rings, hubs, clutch bodies), in the engine compartment (gearwheels, bearing covers, sprockets), in the steering system (pistons, guides)