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Copperslip and its downside! #

Posted by Gary Sheriff on October 26, 2009, 2:40 pm
Message modified by board administrator October 27, 2009, 11:11 am

I don`t know what to make of this with regards to the use of copperslip and its opposition to alloys. For years I have used and taught others the benefits of using copperslip only to be told today that it reacts adversly with alloy! Can anyone enlighten me any further please.

Re: Copperslip and its downside!

Posted by Tom Williams on October 27, 2009, 11:22 am, in reply to "Copperslip and its downside! #"
Tom Williams

Hi,

If you have Bosch ESItronic there is an excellent bulletin which gives a very good technical/chemical explanation of why you should not use it in many applications.
Basically if you have aluminium alloys and steels in close contact and you add a layer of copper this will react with saltwater to produce galvanic corrosion.
Why people persist in using the stuff I don't know. There are plenty of better alternatives. BMW have sold sachets of the correct lube for years. The other problem is that when it is used on things like clutch splines it dries out leaving a copper powder residue.
Most manufacturers have issued bulletins warning against it's use. Porsche issued one a few years back because mechanics were using it where the alloy wheels mate to steel hubs. For many applications, high melting point lithium based greases work best.

TW

Re: Copperslip and its downside!

Posted by pete greenow on October 27, 2009, 2:01 pm, in reply to "Re: Copperslip and its downside!"
Peter Greenow

Hi All

We use a ceramic grease supplied by Innotec Art No 03.0120 which is high pressure / temp proof & with its non metallic composition acts as an isolator between different metal joints.

As with every good product it does carry a premium price but it works & with its pressurised can & built in brush applicator is very easy to use & not wasteful.

Regards Pete

Re: Copperslip and its downside!

Posted by John kennard on October 29, 2009, 2:03 pm, in reply to "Re: Copperslip and its downside!"

Hi I've been banging on about the down side of copperslip for years. Kent Industries do a very good ceramic grease spray 400ml or 200g tub. No more seized alloy wheels etc. It never ceases to amaze me how many people in this trade think copperslip is the next best thing to sliced bread.
http://www.kenteurope.com/uk/shop/viewfamily.php?viewfamily=4844§ionid=228&type=Auto

John Kennard

Re: Copperslip and its downside! #

Posted by Peter Warman on October 29, 2009, 2:21 pm, in reply to "Copperslip and its downside! #"
Peter Warman - Administrator

We have been using the Brake Paste sachets from Wurth. Book each sachet to the job

http://www.wurth.co.uk/catalogue/pdfs/UK-CD_05_0025.pdf

Peter

Re: Copperslip and its downside!

Posted by Mark Mcgrath on October 29, 2009, 10:22 pm, in reply to "Re: Copperslip and its downside!"
Mark McGrath

we used to to have a mechanic next door to our workshop that used to blather copperslip on everything on cars battery terminals/wheels/rusty brake pipes/flexi hose ends etc ,when we asked him why his answer was it "looked good to customers" !!!

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