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Characterisation of Films Grown on Aluminium Immersed in Aerated Saline Solutions Containing Nickel
Author(s) -
Rider A. N.,
Arnott D. R.,
Wilson A. R.,
Danilidis I.,
Paterson P. J. K.
Publication year - 1996
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/(sici)1096-9918(199605)24:5<293::aid-sia115>3.0.co;2-a
Subject(s) - durability , materials science , aluminium , nickel , adhesive , x ray photoelectron spectroscopy , chloride , oxide , chromate conversion coating , corrosion , salt (chemistry) , chemical engineering , adhesive bonding , metallurgy , layer (electronics) , composite material , chemistry , organic chemistry , engineering
Small additions of nickel chloride to salt solution significantly reduce the corrosion of aluminium alloys. Films produced in these solutions produce a microrough topography which may be suitable for adhesive bonding. Techniques such as XPS, SEM, FTIR and SIMS were used to investigate the properties of the films. The results established that nickel is incorporated in the outer layer of a hydrated aluminium oxide film and is responsible for altering the film growth mechanism. Boeing wedge tests were conducted to assess the relative durability of bonds with adherends pretreated in the salt solutions. The durability performance of the film as a surface treatment for adhesive bonding compared favourably with the Forest Products Laboratory chromate etch. A comparison of the nickel salt treatment with a sodium chloride solution treatment indicated that durability differences were related to their respective hydrated oxide structures.