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Zinkphosphatier-Ersatztechnologie im Automobilbau - Korrosionsschutz im Multi-Metall-Prozess

Performance of new pretreatment technologies as substitute for zinc phosphating in the automotive multi-metal-process for corrosion protection
: Christ, Ulrich; Bauder, Christina

Metzner, Martin (Mitarb.) ; Landesmesse Stuttgart; Deutsche Messe AG, Hannover; Fraunhofer-Institut für Produktionstechnik und Automatisierung -IPA-, Stuttgart:
O&S Forum 2014 : 24.-26. Juni 2014, Stuttgart, im Rahmen der Internationalen Fachmesse für Oberflächen & Schichten
Stuttgart, 2014
26 Folien
Internationale Fachmesse für Oberflächen und Schichten (O&S) <2014, Stuttgart>
Conference Paper
Fraunhofer IPA ()
Multi-Metall; Oberflächenvorbehandlung; Korrosionsschutz; Dünnschicht; Automobil

The objectives, work program and first results of the FOSTA research project P906 will be presented: For decades the zinc phosphating process worked satisfactorily as the global standard for excellent corrosion protection in the automotive industry. Due to more severe environmental regulations and increasing demands to preserve energy and resources in automobile manufacturing it has to be replaced by new technologies. New thin layer pretreatment technologies on various standard steel and aluminum substrates as well as new substrate materials, e.g. galvanized steel with zinc-magnesium, are compared with zinc phosphate in its corrosion protection properties in combination with KTL in the multi-metal-process. One important aspect in this study is the correlation of the anti-corrosion behavior at intensified outdoor weathering with the new cyclic corrosion test according to VDEh standard SEP 1850 respectively new VDA standard 233-102 performed as round-robin tests. First results from new cyclic corrosion test and from scientific evaluation of materials properties will be presented. They will offer insights into the performance of these systems and will help to identify strengths and weaknesses of specific combinations of the new technologies. An outlook will be given about the benefit of the completed study for manufacturers of steel, organic coatings and pretreatment chemistry and automotive industry.