Print Email Facebook Twitter Effects of cooling rate on corrosion properties of high strength aluminium alloys under atmospheric conditions Title Effects of cooling rate on corrosion properties of high strength aluminium alloys under atmospheric conditions Author Schra, L. 't Hart, W.G.J. Institution National Aerospace Laboratory NLR Date 1990-04-19 Abstract Long-term outdoor exposure tests were done to investigate the effect of cooling rate on corrosion and stress corrosion properties of extruded rods of the high strength aluminium alloys 2024-T4, 2023-T6, 7075-T6 and 7075-T73. The 2024 alloy exhibited a high susceptibility to SCC irrespective of best treatment and cooling rate, whereas 7075-T6 was susceptible to SCC only at high cooling rates. All tested alloys showed an abrupt change from low to high SCC growth resistance at specific cooling rates. The 2024 alloy proved to be more prone to exfoliation corrosion than 7075. The corrosion susceptibility decreased at high cooling rates fir 2024-T4 and 7075-T6, whereas the cooling rate had no effect for 2024-T6 and 7075-T73. Bot the SCC and exfoliation corrosion behaviour could be predicted by accelerated laboratory test methods. Subject exposurealuminium alloysextrudingstress corrosion crackingquenching (cooling)corrosion testsatmospheric effectsscale (corrosion)high strength alloys To reference this document use: http://resolver.tudelft.nl/uuid:5d9e2682-6941-4128-b7a1-b8a0ad372f32 Publisher Nationaal Lucht- en Ruimtevaartlaboratorium Access restriction Campus only Source NLR Technical Publication TP 90138 U Part of collection Aerospace Engineering Reports Document type report Rights (c) 1990 National Aerospace Laboratory NLR Files campus only