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spongebob squarepants
Paul Ricard


Joined: 20 Dec 2009
Posts: 3430
Location: Manchester and Iraq


PostPosted: Mon Feb 05, 2018 5:05 pm    Post subject: Reply with quote

Having had the same problem multiplied by serious OCD the only 'cure' is drive till COMPLETELY dry, as others have said hbrake off, 100% then (in heated garage) no issues. Any moisture they seize like f U.K.
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Magic919
Montreal


Joined: 05 Jun 2013
Posts: 607
Location: Berkshire


PostPosted: Mon Feb 05, 2018 5:18 pm    Post subject: Reply with quote

Blow them dry https://www.metrovacworld.com/product/Air_Force_Master_Blaster/overview

Can’t imagine the handbrake shoes do much sticking, so I never leave mine off.
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Gottans
Monza


Joined: 25 Mar 2016
Posts: 177



PostPosted: Mon Feb 05, 2018 9:39 pm    Post subject: Reply with quote

I'm sure my neighbours wonder about me and all the car washing, using that in public would confirm all their thoughts. Not quite up there with vacuuming the block paved drive that I did see a neighbour doing but heading the same way.
 
  
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angry
Montreal


Joined: 30 Sep 2008
Posts: 555
Location: East sussex


PostPosted: Mon Feb 05, 2018 9:43 pm    Post subject: Reply with quote

wasz wrote:
Drive the thing then, like you stole it - get some heat in the brakes then put it away dirty again.

This!

What are you guys like!

I bet you don't treat your wives this well! Floor

Worrying about F...ing discs! LOL Floor
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kurlykris
Watkins Glen


Joined: 30 Jun 2014
Posts: 2069
Location: Warwickshire


PostPosted: Mon Feb 05, 2018 10:16 pm    Post subject: Reply with quote

Unfortunately Rusting on the brake discs is a Porsche thing, apparently Sad

When I changed the disks and pads on my Boxster, I opted for Borg and beck discs to attempt to lessen this, the Borg and Beck discs are completely coated in " BecTec " anti corrosive paint, even through the vents, this is removed from the friction surfaces once you apply the brakes when driving. Obviously this does not stop the friction surfaces from surface rusting after washing the car or being parked up in wet or damp conditions.
Almost a year in and the discs still look brand new, no rust whatsoever Thumb

One thing that 99.99999% of drivers don`t do is clear out the cross drilling holes through the friction surfaces, which get full of dirt, gunk, brake dust and obviously hold water when parked up . Blowing them out, or poking through with a drill bit with the wheels off every few months will certainly help Grin
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 13099
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Mon Feb 05, 2018 10:19 pm    Post subject: Reply with quote

angry wrote:

What are you guys like!

I bet you don't treat your wives this well! Floor


I'll have you know I wash my wife once a week just like my car......although I must admit, she doesn't get the two bucket method. Grin
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 13099
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Mon Feb 05, 2018 10:23 pm    Post subject: Reply with quote

kurlykris wrote:

One thing that 99.99999% of drivers don`t do is clear out the cross drilling holes through the friction surfaces, which get full of dirt, gunk, brake dust and obviously hold water when parked up . Blowing them out, or poking through with a drill bit with the wheels off every few months will certainly help Grin


Also worth noting that by not cleaning these holes out, rust builds up and starts ripping away at the pad material to cause an uneven surface, which them mirrors itself back onto the disc, which is why you see a rippled effect on the disc overtime (if you don't clean the holes), ultimately wearing your discs out quicker.
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Palladium
Indianapolis


Joined: 01 Nov 2015
Posts: 2496



PostPosted: Mon Feb 05, 2018 10:25 pm    Post subject: Reply with quote

its the handbrake sticking, i have had cars and vans do that in the past, happens in the winter if you leave the car for a week or two, no big deal really, just leave the handbrake off and in gear, stick bricks round the rear wheels if on a gradient, and stop worrying.
 
  
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silvermilnec
Barcelona


Joined: 20 Feb 2012
Posts: 1369
Location: Leeds West Yorkshire


PostPosted: Mon Feb 05, 2018 10:28 pm    Post subject: Reply with quote

kurlykris wrote:
Unfortunately Rusting on the brake discs is a Porsche thing, apparently Sad

When I changed the disks and pads on my Boxster, I opted for Borg and beck discs to attempt to lessen this, the Borg and Beck discs are completely coated in " BecTec " anti corrosive paint, even through the vents, this is removed from the friction surfaces once you apply the brakes when driving. Obviously this does not stop the friction surfaces from surface rusting after washing the car or being parked up in wet or damp conditions.
Almost a year in and the discs still look brand new, no rust whatsoever Thumb

One thing that 99.99999% of drivers don`t do is clear out the cross drilling holes through the friction surfaces, which get full of dirt, gunk, brake dust and obviously hold water when parked up . Blowing them out, or poking through with a drill bit with the wheels off every few months will certainly help Grin
I like the sound of these, anyone else use these??
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maldren
Hockenheim


Joined: 07 Oct 2016
Posts: 719



PostPosted: Tue Feb 06, 2018 9:15 am    Post subject: Reply with quote

Don't even consider putting anything on the braking surface, the way to keep them clean and shiny is to use them and there is really no alternative.

For the disk hubs, there are plenty of high temperature paint options if you want.
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2003 996.2 C2 Coupe Arctic Silver
 
  
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angry
Montreal


Joined: 30 Sep 2008
Posts: 555
Location: East sussex


PostPosted: Tue Feb 06, 2018 9:43 am    Post subject: Reply with quote

alex yates wrote:
angry wrote:

What are you guys like!

I bet you don't treat your wives this well! Floor


I'll have you know I wash my wife once a week just like my car......although I must admit, she doesn't get the two bucket method. Grin


Floor
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mkoenigsheim
Silverstone


Joined: 08 Nov 2013
Posts: 137



PostPosted: Tue Feb 06, 2018 12:56 pm    Post subject: Re: how do you stop discs from corroding? Reply with quote

wasz wrote:
hedgehogsdad wrote:
I had my car washed last weekend at a local hand car wash.


This is your problem.

They will have used wheel acid to clean the wheels, or alkaline traffic film remover on your cars.

These products bring the dirt off really quick and leave a nice shiny car, but the acid / alkaline continues to east away at your car accelerating corrosion.

Your discs are very susceptible, as are alloys - any paint damage and your wheels will be bubbling up in short order.

Wash any car you care about yourself by hand.


To quote a recent famous movie "almost everything you have just said is wrong" I only wash the car myself - and don't use either of the product types you mention this happens after using a high quality car wash product and like say sometimes after just driving in rain.

Appreciate the input but in my case - your solution isn't the answer!
 
  
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mkoenigsheim
Silverstone


Joined: 08 Nov 2013
Posts: 137



PostPosted: Tue Feb 06, 2018 12:59 pm    Post subject: Reply with quote

Palladium wrote:
its the handbrake sticking, i have had cars and vans do that in the past, happens in the winter if you leave the car for a week or two, no big deal really, just leave the handbrake off and in gear, stick bricks round the rear wheels if on a gradient, and stop worrying.


Great thinking - but I park in A garage and never use the handbrake...
PDK car so it is just left in park. Can't actually remember the last time I used the handbrake!
 
  
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Fed
Newbie


Joined: 13 May 2010
Posts: 13



PostPosted: Tue Feb 06, 2018 1:29 pm    Post subject: Reply with quote

Best thing is a blast around after cleaning, but as I often wash the car in the rain (yes, I know) or when wet out that is not always possible.

I have bought a hot air blower (actually a dog groomer, they're much cheaper) mainly for the bike but also to blow out/dry the discs before the rusting starts. This will give the neighbors even more reason to take the p**s.

Only partial success so far, but working on my technique as you do not get long before they rust. Will update on progress in due course.
 
  
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deMort
Reims


Joined: 21 Mar 2015
Posts: 4451
Location: Brighton


PostPosted: Tue Feb 06, 2018 7:19 pm    Post subject: Reply with quote

Ok .. im going to have to wave my finger here .. blowing out brake discs , shoes .. whatever is not a good idea .. mechanic on the next ramp to me did it once .. he wont be doing it again thats for sure .

Basically its not good stuff .. if your going to do it then i want face masks on please gentlemen .

Anyways .. the inner surface of the disc is what normally corrodes and youll struggle getting an air line on that side .

Basically the discs are very soft which makes them better at stopping but also much better at corrodeing .

Hard run or a fast heat cycle on the brakes which is driving the car with one foot on the brake and the other on the acc . pedal .. im not telling you to do this of cource .. you could over heat the brakes or crash !

Ok thats my safety lecture over .. off to other posts now so you can talk about me behind my back as ive left the room .
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-- 997 --
Österreich


Joined: 11 Jun 2015
Posts: 939



PostPosted: Tue Feb 06, 2018 8:39 pm    Post subject: Reply with quote

Demort wrote:
Ok thats my safety lecture over .. off to other posts now so you can talk about me behind my back as ive left the room .


Hand Grin




J
 
  
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kurlykris
Watkins Glen


Joined: 30 Jun 2014
Posts: 2069
Location: Warwickshire


PostPosted: Tue Feb 06, 2018 9:29 pm    Post subject: Reply with quote

Demort wrote:

Ok thats my safety lecture over .. off to other posts now so you can talk about me behind my back as ive left the room .


Good point Demort, as a professional engineer I always assume that people will follow reasonable Health and Safety and use appropriate PPE.

On the other hand those stupid enough not to will eventually remove their faulty DNA from the available gene-pool and the result will be a much nicer and less stupid world to live in Grin
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alex yates
Brands Hatch
Brands Hatch


Joined: 06 Mar 2014
Posts: 13099
Location: The Ribble Valley, Lancashire

2000 Porsche 996 Carrera 4

PostPosted: Tue Feb 06, 2018 10:28 pm    Post subject: Reply with quote

kurlykris wrote:

On the other hand those stupid enough not to will eventually remove their faulty DNA from the available gene-pool and the result will be a much nicer and less stupid world to live in Grin


They've usually had 5 kids by then.
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Fed
Newbie


Joined: 13 May 2010
Posts: 13



PostPosted: Wed Feb 07, 2018 4:58 pm    Post subject: Reply with quote

Fair point re safety and thanks for your concern over my progeny, but by the time it comes to the drying the wheels will already have been pressure hosed to clean them so there should be little residual dust, and a power hose is surely a lot more agressive at moving any brake dust than hot air. So I suppose you guys always use a face mask when power hosing your wheels?
 
  
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Gottans
Monza


Joined: 25 Mar 2016
Posts: 177



PostPosted: Wed Feb 07, 2018 9:13 pm    Post subject: Reply with quote

I thought this all started when they stopped putting asbestos in brake pads making them harder and prone to corroding onto the disc when wet.

It used to be the case you could use several sets of pads before the disc was too worn but now I don't see brake pads getting changed in isolation anymore, always discs and pads.

As for surface corrosion, this is just cost reduction of the disc material with lower grade, softer and less corrosion resistant steel.
 
  
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