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Eco-friendly corrosion protection based on hybrid nano-materials

: Weigel, P.; Kräusel, V.; Kron, J.; Deichmann, K.-J.; Zeltner, S.; Rudolf, A.

Fulltext urn:nbn:de:0011-n-1568070 (317 KByte PDF)
MD5 Fingerprint: ffaae0eba944d5a73b8c9c2718e28282
Created on: 29.3.2011

Gesellschaft für Chemische Technik und Biotechnologie -DECHEMA-:
Corrosion from the nanoscale to the plant. EUROCORR 2009, the European Corrosion Congress. CD-ROM : 6 - 10 September 2009, Nice, France
Nice, 2009 (EFC event 310)
6 pp.
European Corrosion Congress (EUROCORR) <2009, Nice>
Conference Paper, Electronic Publication
Fraunhofer IWU ()
Fraunhofer ISC ()
pre-treatment; Vorbehandlung; eco-friendly; umweltfreundlich; chromate-free; chromfre; sol-gel; hybrid nano-composites; hybride Nanokomponente

Within a joint project scientists of Fraunhofer ISC, Fraunhofer IWU and IKS have worked together to develop an ecologically sustainable concept for a corrosion protection method based on hybrid nano-composites and have evaluated the process as an alternative to environmentally harmful chromating on top of galvanized steel panes. Different types of zincplated surfaces have been investigated. Selected hybrid polymer nano-composites have been applied on various zinc surfaces in a dip coating process and finally provided with a standard polyester powder coating. The performance of these samples have then been compared with relevant, commercially available anti-corrosion systems in defined test procedures in order to assess the adhesion strength and the degree of corrosion of the laminated composites. In addition, the deformability behaviour in bending and deep-drawing processes has been examined. Especially on electro-galvanized surfaces, samples with the newly developed hybrid nanomaterials exhibited good adhesion and corrosion-protection characteristics after 360 h in the salt spray test (DIN EN ISO 9227-NSS). Test samples coated with these hybrid materials and covered with polyester powder could easily be bended and deep-drawn, no matter what type of galvanization had been applied. The nano-materials on the whole displayed a tolerant behaviour against the tested galvanizations and showed levels of performance comparable to commercial systems of yellow chromating and Cr(III)-based passivation.