Corrosion Behaviour Correlation of the Secondary Aluminium Casts in Natural Atmosphere and Laboratory Conditions

The secondary aluminium alloys are very important material in actual industry from economic and ecological point of view. The secondary aluminium used for production of casts, however, contains some elements, i.e. iron, – affecting physical, chemical and mechanical behaviour. The subject of our inve...

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Bibliographic Details
Published in:Archives of metallurgy and materials 2020-01, Vol.65 (4), p.1455
Main Authors: Kuchariková, L, Liptáková, T, Tillová, E, Bonek, M, Medvecká, D
Format: Article
Language:English
Subjects:
Aluminum base alloys
Casting alloys
Corrosion
Corrosion resistance
Iron
Laboratories
Mechanical properties
Microscopy
Optical microscopy
Weight loss
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Summary:The secondary aluminium alloys are very important material in actual industry from economic and ecological point of view. The secondary aluminium used for production of casts, however, contains some elements, i.e. iron, – affecting physical, chemical and mechanical behaviour. The subject of our investigation has been corrosion behaviour in natural atmosphere of the hypoeutectic AlSi7Mg0.3 cast alloys with various content of iron, because the Fe content affects not only mechanical properties but corrosion resistance, as well. Three types of the AlSi7Mg0.3 cast alloys were exposed for 9 months in natural atmosphere and the measure of their degradation by corrosion was found by determination of the weight loss and the light microscopy. In addition, a scanning electron microscopy (SEM) analyses and evaluation of surface changes were used. The corrosion behaviour in natural atmosphere was compared to results of the carried out electrochemical and exposure laboratory experiments in chloride solutions.
ISSN:1733-3490
2300-1909
DOI:10.24425/amm.2020.133713