ISSN 2305-6894

Protection of aluminium alloys from atmospheric corrosion by thin films of inhibitors

  • A.M. Semiletov
A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119071 Russian Federation

Abstract: Some prospects for protection of aluminum alloys by corrosion inhibitors such as carboxylates and trialkoxysilanes are considered. The efficiency of inhibition of anodic dissolution of Al alloys by these compounds in a neutral borate buffer solution containing chlorides (pH 7.4) was investigated. The protective capability of the layers obtained was estimated by an express method (drop test method) and by tests in a heat and moisture cabinet, and in a salt fog cabinet. The efficiency of treatment of Al alloys by aqueous solutions of organic inhibitors was compared with the protective ability of chromate films. It is shown that the passivation of Al alloys by the composition of oleyl sarcosinate with aminoethylaminopropyl–trimethoxysilane at a ratio of 3:1 is an efficient protection method even under salt fog conditions.

Keywords: corrosion, aluminum and its alloys, corrosion inhibitors, trialkoxysilanes, carboxylates

Int. J. Corros. Scale Inhib., , 6, no. 4, 449-462 PDF (1 057 K)
doi: 10.17675/2305-6894-2017-6-4-5

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Back to this issue content: 2017, Vol. 6, Issue 4 (pp. 359–503)