Correlation between accelerated tests and outdoor exposure of coil coated chromate and chromate free systems
Authors: Zapponi, M.; Elsner, C. I.; Actis, F.; Di Sarli, A. R.
Source: Corrosion Engineering, Science and Technology, Volume 44, Number 2, April 2009 , pp. 119-127(9)
Publisher: Maney Publishing
Abstract:Despite the good corrosion resistance of chromate coatings, there is a general agreement in eliminating the Cr(VI) compounds for corrosion protection owing to their health hazards. Coil coaters are looking for maintained or improved anticorrosion properties. Therefore, coil coated materials painted with conventional polyester topcoat and with either standard strontium chromate or water based epoxy Cr(III) primer were evaluated through a battery of accelerated and outdoor exposure tests. Physicochemical properties, corrosion potential and electrochemical impedance were measured before and after exposure of coated panels in salt spray, humidity or weathering chambers. Experimental results showed that the conventional chromatised polyester primer/polyester topcoat system provides better protective properties than the water base epoxy primer with Cr(III)/polyester system. This was also observed in replicated panels exposed outdoor but just after two years. The protection mechanism was analysed on the basis of the experimental results and the applied formulation type.
Document Type: Research Article
Publication date: 2009-04-01
Authors wishing to cite fast track papers should give the journal name and the article DOI. This will enable reference linking via CrossRef and allow forward and backward citation tracking systems to associate the fast track citation with the final journal reference.
This journal features top 10 articles which are freely available. Please click here and click on the 'Top articles' link in the right-hand menu to view the list and start downloading.
- Editorial Board
- Information for Authors
- Subscribe to this Title
- Terms & Conditions
- Online submission site
- Top 10 Articles
- ingentaconnect is not responsible for the content or availability of external websites