Painted Discs - Less Corrosion?
Painted Discs - Less Corrosion?
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Discussion

sato

Original Poster:

590 posts

233 months

Monday 7th March 2016
quotequote all
Hi,

My car doesn't get used much in winter and as it lives outside the brake discs need replacement due to corrosion long before they wear out.

I have come across these, which on the face of it are just what I need.
https://www.eliseparts.com/products/show/21/30/ult...

Does anyone have any experience of whether painted discs actually resist corrosion better than normal ones, or whether it is just a bit of a gimmick?

The Wookie

14,185 posts

250 months

Monday 7th March 2016
quotequote all
most production discs (if not all) are supplied with a protective coating to prevent or delay rust however it usually happens to be silver so you might not actually realise it's coated. It usually lasts a good while too, check out a rear disc of something with a drum in hat parking brake and you'll see that it takes a couple of years to start degrading.

Obviously it lasts about half a dozen brake applies before it wears off the rubbing surface... I doubt 'painted' protection will last any longer.

If you want to try and prevent corrosion, park it up indoors with the brakes cool and dry. To be honest corrosion isn't that big an issue unless it's extreme. Just drive it and give it a few brake applies to clean it off.

sato

Original Poster:

590 posts

233 months

Monday 7th March 2016
quotequote all
The Wookie said:
most production discs (if not all) are supplied with a protective coating to prevent or delay rust however it usually happens to be silver so you might not actually realise it's coated. It usually lasts a good while too, check out a rear disc of something with a drum in hat parking brake and you'll see that it takes a couple of years to start degrading.

Obviously it lasts about half a dozen brake applies before it wears off the rubbing surface... I doubt 'painted' protection will last any longer.
Thanks - pretty much as I expected.

The Wookie said:
If you want to try and prevent corrosion, park it up indoors with the brakes cool and dry. To be honest corrosion isn't that big an issue unless it's extreme. Just drive it and give it a few brake applies to clean it off.
Sadly parking indoors isn't an option. Something is clearly going on though as the discs fitted less than 12 months ago feel (through the brake pedal) corroded to me even after a spirited drive.

The Wookie

14,185 posts

250 months

Monday 7th March 2016
quotequote all
No probs, I wouldn't be surprised if you can feel the coarseness or deposition through the chassis or pedal initially but it should disappear after a series of good brisk slows from a decent speed and/or a couple of hundred miles of light driving.

If you're getting proper judder even after cleaning them up then it might just be worth trying a different brand of discs. You might find they're using a different grade of iron which survives better.

PaulKemp

979 posts

167 months

Monday 7th March 2016
quotequote all
The anti corrosion coating should be cleaned off with thinners before using the brakes
I've painted the bells and the circumference of the discs on a little used kit car but the braking surface you can only clean up by brake application or remove them and clean.

trickywoo

13,491 posts

252 months

Friday 15th April 2016
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Brembo do uv coated discs which are supposed to be a lot more corrosion resistant (including the vented bits) than standard.

If I understand correctly the discs are ready to fit ie the protective coating doesn't need to be removed from the faces with cleaner.

The Brembo part numbers for these uv discs are normally the standard number with the last digit (usually a 0) replaced with a 1. They aren't expensive if you shop around. If they are available for your car well worth looking at.

Jimmyarm

1,962 posts

200 months

Friday 15th April 2016
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All the pagid discs from ECP are painted, you don't take clean it off when fitting.

A quick road test and it's gone.

It seems to last well too, I've fitted plenty over the past couple of years and seen the cars back again the next year.

Should be standard on the better brands IMO.

PositronicRay

28,503 posts

205 months

Friday 15th April 2016
quotequote all
I've Pagid on the front and a GSF brand on the back. I had to paint the top hat on the back, the front has stayed corrosion free. Pagids rock. biggrin