Chromate-free passivation of aluminum alloys for paint repair technologies

• Yu. P. Avdeev¹, V. A. Karpov¹, L. B.Maksaeva² and M. A. Petrunin²

¹ A.N.Severtsev Institute of ecology and evolution problems, Russian Academy of Sciences, Leninskii pr. 33, Moscow, 119071 Russian Federation
² A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071 Russian Federation

Abstract: A comparative evaluation of the protective properties of chromate-free passivating formulations offered as an alternative to the widely used method for passivation of aluminum surfaces by Cr(VI) compounds has been carried out. It has been shown that the protective properties of the compounds tested in the system with the EP-0215 primer are nearly not inferior to the formulations based on hexa- and trivalent chromium.

Keywords: aluminum alloys, passivating formulations, local chemical oxidation, hexavalent chromium, corrosion tests, paint coatings

Int. J. Corros. Scale Inhib., 2014, 3, no. 3, 198–203 PDF (418 K)
doi: 10.17675/2305-6894-2014-3-3-198-203

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