- Wong, D. and Cocks, F.H., Aluminum pitting corrosion in aqueous glycol solutions: characteristics and relevance to solar thermal collector systems,
Corrosion (USA), vol. 36 no. 9
pp. 513 - 14 .
(last updated on 2007/04/10)
Presents work specifically directed towards the determination of both the rate of pit depth growth in aluminum alloys in aqueous ethylene glycol solutions with both chloride and heavy metal ions present and the exponent (a) for aluminum alloys in such a corrosive medium. Pitting rate tests for both 1100 (nominally 99.0% Al) and 3003 (nominally 0.12% Cu, 1.2% Mn balance Al) series aluminum alloys were carried out in a 85 vol% ethylene glycol solution at 130°C. The impurities added to this solution consisted of 200 ppm each of Cl-, Cu+2, and Fe+3 ions. Two sets of 2×2×1/16 inch coupons made of 1100 and 3003 series alloys were immersed in this (aerated) solution. Pit depths (D) on samples exposed over various periods of time up to 32 weeks were measured using quantitative metallographic methods
aluminium;aluminium alloys;copper alloys;corrosion;solar absorber-convertors;