Caliper rust

stevep999 · May 1st, 2012, 19:44

Any ideas how I can stop this ? On a 2011 v50, I've wire brushed it all off once, just bugs me :-(

NigeS · May 1st, 2012, 19:52

It'll keep going rusty unless you paint the surface!

I've been using Epoxy Mastic on suspension parts, chassis repairs, calipers, etc for a few years now and seems very resilient and long lasting. I've coated the ARB arms on my 911 with it and they're exposed to the elements and were quite rusty beforehand, they still look like the day I painted them now.

£25 for a starter pack, but it goes a long way. I've bought both black and silver in the starter packs about 3 years ago and still have a fair bit left, a little goes a long way.
http://www.rust.co.uk/epoxy-mastic.cfm

stevep999 · May 1st, 2012, 19:54

Never noticed it happening on any other cars I've had, any reason for it ?

NigeS · May 1st, 2012, 20:07

Not all manufacturers coat the calipers with anything. Some will passivate them, a yellowy/gold finish which offers some protection, which then usually oxidises anyway which in itself offers some protection. I guess the action of your wire brushing it has removed any protection that there was. In your pic see how the bits you haven't got the brush to remain "whited" over.

If your surface prep is good Hammerite can be made to last and is a cheaper alternative. If you do don't go red, black or grey is good. I think red only work if you've got some nice cast ali Brembo type of calipers.

Over use of ali wheel cleaners like Wonder Wheels can strip whatever remains of the coating from the calipers, leaving the cast iron to surface rust.

nbuuifx · May 1st, 2012, 20:07

better brake pads means less brake dust. Usually they get a good coating of black brake dust which then makes them look better.

Daim · May 1st, 2012, 20:13

That rust will brush off. The calipers are made of aluminium. The rust is from your discs and pads.

I painted mine copper metallic so it doesn't look too sporty and has a decent "look".

Clan · May 1st, 2012, 20:42

Quote:

Originally Posted by stevep999

Never noticed it happening on any other cars I've had, any reason for it ?

That is typical after being cleaned with strong alloy wheel cleaner which is an acid . It gets the electroplating off as well as the dirt !.

NigeS · May 1st, 2012, 20:43

They're not ali calipers.

stevep999 · May 1st, 2012, 20:45

Guess the dealer must have cleaned them a bit too well then ! Looks like a painting session needed then

Daim · May 1st, 2012, 21:43

Quote:

Originally Posted by NigeS

They're not ali calipers.

They are, as I could brush off the rust with ease. A little bit of soapy water was enough to wash it off... The rust isn't from the calipers! Granted!

The only part which is steel and could rust, is the carrier the caliper is bolted to.

May 1st, 2012, 19:44	#1
stevep999 Junior Member Last Online: Sep 15th, 2013 22:27 Join Date: Oct 2011 Location: Chelmsford	Caliper rust Any ideas how I can stop this ? On a 2011 v50, I've wire brushed it all off once, just bugs me :-( __________________ V50 D2 r design :-) Last edited by stevep999; May 1st, 2012 at 19:51.

May 1st, 2012, 19:52	#2
NigeS Senior Member Last Online: May 11th, 2015 17:54 Join Date: Apr 2012 Location: Denby View Photos By: NigeS	It'll keep going rusty unless you paint the surface! I've been using Epoxy Mastic on suspension parts, chassis repairs, calipers, etc for a few years now and seems very resilient and long lasting. I've coated the ARB arms on my 911 with it and they're exposed to the elements and were quite rusty beforehand, they still look like the day I painted them now. £25 for a starter pack, but it goes a long way. I've bought both black and silver in the starter packs about 3 years ago and still have a fair bit left, a little goes a long way. http://www.rust.co.uk/epoxy-mastic.cfm __________________ 2003 Volvo V70 D5 2004 Mini Coooper S 1988 Porsche 911 Carrera

May 1st, 2012, 19:54	#3
stevep999 Junior Member Last Online: Sep 15th, 2013 22:27 Join Date: Oct 2011 Location: Chelmsford	Never noticed it happening on any other cars I've had, any reason for it ? __________________ V50 D2 r design :-)

May 1st, 2012, 20:07	#4
NigeS Senior Member Last Online: May 11th, 2015 17:54 Join Date: Apr 2012 Location: Denby View Photos By: NigeS	Not all manufacturers coat the calipers with anything. Some will passivate them, a yellowy/gold finish which offers some protection, which then usually oxidises anyway which in itself offers some protection. I guess the action of your wire brushing it has removed any protection that there was. In your pic see how the bits you haven't got the brush to remain "whited" over. If your surface prep is good Hammerite can be made to last and is a cheaper alternative. If you do don't go red, black or grey is good. I think red only work if you've got some nice cast ali Brembo type of calipers. Over use of ali wheel cleaners like Wonder Wheels can strip whatever remains of the coating from the calipers, leaving the cast iron to surface rust. __________________ 2003 Volvo V70 D5 2004 Mini Coooper S 1988 Porsche 911 Carrera

May 1st, 2012, 20:13	#6
Daim Brit in Germany Last Online: Apr 24th, 2024 06:58 Join Date: Jan 2011 Location: Bremen	That rust will brush off. The calipers are made of aluminium. The rust is from your discs and pads. I painted mine copper metallic so it doesn't look too sporty and has a decent "look". __________________ The Best Nation Is Imagination 2010 V70 (Type 135) D5 (D5244T10) Automatic (TF-80SC)

May 1st, 2012, 20:07	#5
nbuuifx Senior Member Last Online: May 1st, 2015 23:01 Join Date: Dec 2011 Location: Staffs	better brake pads means less brake dust. Usually they get a good coating of black brake dust which then makes them look better.

May 1st, 2012, 20:43	#8
NigeS Senior Member Last Online: May 11th, 2015 17:54 Join Date: Apr 2012 Location: Denby View Photos By: NigeS	They're not ali calipers. __________________ 2003 Volvo V70 D5 2004 Mini Coooper S 1988 Porsche 911 Carrera

May 1st, 2012, 20:45	#9
stevep999 Junior Member Last Online: Sep 15th, 2013 22:27 Join Date: Oct 2011 Location: Chelmsford	Guess the dealer must have cleaned them a bit too well then ! Looks like a painting session needed then __________________ V50 D2 r design :-)

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