Extruded AA6060 aluminium has been subjected to various surface pre-treatments before application of a one component structural epoxy adhesive, XD4600. The durability of joints has been assessed by wedge adhesion and filiform corrosion (FFC) testing of panels coated with adhesive. A chromate-free Ti–Zr-based pre-treatment provided improved durability relative to an alkaline etch and deoxidation pre-treatment, but was clearly inferior to chromating in terms of adhesion and FFC resistance. Excessive Ti–Zr oxide deposition occurred in the vicinity of intermetallic α -Al(Fe,Mn)Si particles during pre-treatment, which significantly reduced the performance of bonded joints during wedge test. The intermetallics furthermore played a crucial role in promoting FFC, as demonstrated by complete FFC immunity of an AA6060 model analogue alloy (AlMg0.5Si0.4) free from α -Al(Fe,Mn)Si particles. The Ti–Zr-based pre-treatments provided limited protection against FFC on AA6060, apparently due to a limited effect of the Ti–Zr oxide conversion coating in reducing the cathodic activity of the intermetallic particles. In search for chromate-free pre-treatments for painted or adhesive bonded aluminium, inhibition of the cathodic activity on the Fe containing particles is suggested as an important factor to prevent FFC.
International Journal of Adhesion and Adhesives – Elsevier
Published: Apr 1, 2004
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera