Bonding metal to carbon

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Bonding metal to carbon

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panda	panda posted 9 Years Ago HOT Topic Details
Group: Forum Members Posts: 47, Visits: 2.1K	Hi All, I have a problem bonding metal to carbon fibre, I'm using sikaflex, which I have never had a problem with before, but it keeps "sliding" out of the bond. There is a good key on both parts and they are fully degreased using acetone. The problem seems to be the aluminium keeps sliding out of the sikaflex and not bonding. I need to get it fixed for next weekend so any help is much appreciated! This is what I am trying to stick into a kayak here and I have attached a picture of the problem. There is a large bonding area it doesn't seem to want to stay put! I have been able to pick the boats up by this part in the past, so something is definitely going a miss! I have also tested bonding from the same tube using a carbon carbon bond and it holds up as well as it should so it's not a bad batch. Thanks, Tom www.pandakayaks.co.uk
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FLD	FLD posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 468, Visits: 2.7K	You need some sort of key on the aluminium. Another option is a PU primer which is a runny PU adhesive. This gets into the nooks and crannies of the alu surface to give a good bond. I use 'winbond' from a screen fitter with tiger seal and it works a treat.
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panda	panda posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 47, Visits: 2.1K	Thanks FLD, There is a good key on the aluminium which is what is so confusing, the other side of the rail wont move and is going to take some force to get out. I will take a look at the PU primer and try that out. Tom www.pandakayaks.co.uk
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FLD	FLD posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 468, Visits: 2.7K	If youre anywhere near Macclesfield I can lend you some to play with.
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panda	panda posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 47, Visits: 2.1K	Thanks FLD but a bit far from Nottingham, hopefully I have sorted it out now but only time will tell... www.pandakayaks.co.uk
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Fasta	Fasta posted 9 Years Ago HOT Post Details
Group: Forum Members Posts: 468, Visits: 3.5K	For Sikaflex there is probably a specific primer needed for bonding to aluminum. You should also consider using a methacrylate adhesive like Plexus. Fastacraft Facebook page
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