Stuttgartpaper.pdf (895.04 kB)
Environmentally-friendly surface treatments
conference contribution
posted on 2009-05-05, 13:39 authored by Gary Critchlow, Keith YendallKeith Yendall, Tim Cartwright, Ian A. AshcroftThe presentation will focus upon both existing and novel developmental processes for the replacement of the
hexavalent chromium containing 40/50V Bengough-Stuart anodise (CAA), with particular emphasis on their
resultant performance in structurally bonded systems. Two systems of particular interest are based upon a
phosphoric acid based electrolytic deoxidiser (EPAD) studied in combination with a standard sulphuric acid
anodise and an alternating current-direct current phosphoric-sulphuric (ACDCPSAA) anodise in a benign
electrolyte. It has been shown that the EPAD provides an open porous structure in order to enhance adhesion
to the modified sulphuric acid anodised (SAA) surface. Additionally, a post anodising (PAD) treatment has
been used to further aid structural adhesion in combination with the aforementioned processes. As a control,
the standard 40/50V Bengough-Stuart chromic acid anodising (CAA) has been used as a baseline
performance indicator in adhesion tests. Adhesion levels have been established using single lap shear and
modified wedge test configurations. Overall, excellent initial joint strengths and durability have been found
with both EPAD and ACDCPSAA, suggesting that these environmentally benign treatments may be used as
possible drop-in replacements for the currently used CAA process.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Materials
Citation
CRITCHLOW, G.W. ... et al, 2008. Environmentally-friendly surface treatments. IN: Automotive Adhesives, Sealants & Coatings, Proceedings of the Conference held on 10 June & 11 June 2008 at Stuttgart, Germany. Rapra Smithers, pp. 18/1-18/11Publisher
Smithers Rapra / (c) Gary Critchlow, Keith Yendell, Tim Cartwright & Ian AshcroftVersion
- AM (Accepted Manuscript)
Publication date
2008Notes
This is a conference paper that was published in the book Automotive Adhesives, Sealants & Coatings [(c) Smithers Rapra].ISBN
9781847350725Language
- en