Strict regulations concerning the content of VOCs (volatile organic compounds) and heavy metals (Cr(VI)) in aircraft coating systems have increased the economic of the USAF (United States Air Force) in the area of coating maintenance. To this end, it is critical to have methods to characterize new coating systems in such a manner that the data can be used to predict accurately and reliably the expected lifetime of coatings in service. ENM (electrochemical noise method) and EIS (electrochemical impedance spectroscopy are two techniques used to monitor extent and rate of corrosion. The USAF is currently employing these methods in order to supplement data acquired from traditional salt-spray methods. ENM and EIS are used to evaluate each component of the coating system and its contribution to corrosion prevention. Preliminary evaluation of an aircraft coating system on aluminum substrate (Al 2024-T3) produces resistance noise values of 106 Ohm/cm2 to 107 Ohm/cm2. It is hoped that these results will form the basis of coatings that give increased USAF fleet service life and reduction in maintenance manpower and material costs.
Preliminary evaluation of the anticorrosive properties of aircraft coatings by electrochemical methods
Progress in Organic Coatings. An International Journal ; 32 , 1-4 ; 31-34
1997
4 Seiten, 4 Bilder, 8 Quellen
Aufsatz (Zeitschrift)
Englisch
Flugzeugbau , Korrosionsschutz , Chrom , Aluminiumlegierung , elektrochemische Analyse , Betriebsbedingung , Lebensdauer , Wartungskosten , USA (United States of America) , Grundiermittel , Deckanstrich , Chromatieren , organischer Überzug , Umweltschutz , Chromat , flüchtige organische Verbindung , elektrochemisches Prüfverfahren
Anticorrosive cerium-based coatings prepared by the sol-gel method
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