𝔖 Bobbio Scriptorium
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Inhibitors for the protection of aerospace aluminium alloy

✍ Scribed by M. Kabasakalog̃lu; H. Aydin; M. L. Aksu


Publisher
John Wiley and Sons
Year
1997
Tongue
German
Weight
1021 KB
Volume
48
Category
Article
ISSN
0947-5117

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✦ Synopsis


Chromate pigmented paints are commonly used in painting the aluminium parts of the aircrafts. This study is directed to find an alternative inhibitor in place of chromate the most widely used inhibitor in aircraft paints. In that effect sodium benzoate, polyacrylic acid (PAA), strontium chloride, cerium chloride, malic acid, glycin, cobalt sulphate, pyrrol, and quartamin T (alkyl three methyl ammonium chloride) were tried in place of Na,CrO,. The anodic and cathodic polarisation curves were recorded and weight loss measurements were carried out in 0.1 M NaCl solutions with and without inhibitor. Quartamin T, pyrrol and PAAwhich were observed to provide satisfactory inhibition effect were added to the polyurethane based paints used in the aircraft industry and the Al (2024) alloy painted with this paint was subjected to electrochemical corrosion tests in 0.1 M NaCI. Pyrrol and quartamin T containing paints were observed to give results as good as those obtained with chromate containing paints.

Chromatpigmentierte Farben werden ublichenveise fur die Beschichtung der Aluminiumteile von Flugzeugen eingesetzt. Die vorliegende Untersuchung beschaftigt sich damit, einen alternativen Inhibitor zum Ersatz von Chromat, dem fur Flugzeugbeschichtungen am meisten verwendeten Inhibitor. ZU finden. Zu diesem Zweck wurden Natriumbenzoat. Polyacrylsiiure (PAA), Strontiumchlorid, Ceriumchlorid, Apfelsaure, Glycine, Kobaltsulfat, Pyrrol und Quartamin T als Alternative fur Na,CrO, getestet. In 0,l M NaCl Liisungen mit und ohne Inhibitor wurden anodische und kathodische Polarisationskurven aufgenommen sowie Massenverlustmessungen durchgefuhrt. Die Substanzen, die offensichtlich einen zufriedenstellenden Inhibierungseffekt liefern (Quartamin T, Pyrrol und PAA), wurden den in der Luftfahrtindustrie venvendeten, auf Polyurethan basierenden Farben zugesetzt. und die mit dieser Farbe beschichtete A1 (2024) Legierung wurde elektrochemischen Korrosionsversuchen in 0,1 M NaCl unterzogen. Pyrrol und Quartamin T enthaltene Farben verhielten sich ahnlich gut wie die Farben mit Chromat.


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