Sample preparation of anodised aluminium oxide coatings for scanning electron microscopy
2017; Elsevier BV; Volume: 101; Linguagem: Inglês
10.1016/j.micron.2017.06.010
ISSN1878-4291
AutoresJonathan Long, Antonia Borissova, Andrew D. Wilson, J.C. Avelar-Batista Wilson,
Tópico(s)Concrete Corrosion and Durability
ResumoCharacterisation of anodic aluminium oxide coatings and measurement of their thickness using microscopic techniques is valuable for analysing the effectiveness of the prior anodising process. Three different methods for preparing samples to view the coating cross-section (mechanical fracturing, cryogenic fracturing and metallography) were trialled and assessed for speed of implementation, simplicity and achievable measurement accuracy. Cryogenic fracturing was found to be destructive to samples. Mechanical fracturing yielded relatively accurate coating thickness measurements and coating structural information. Metallography provided the most accurate coating thickness measurement at the expense of coating structural information.
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