Best way to stop an exhaust rusting - Coatings

squishio · Spanner Monkey Joined: 07 Jul 2007 Karma :

Hi All

The exhaust on my GT250 is made out of really shite steel and rusts like hell.
Last year I took it to a local blasters who stripped it back to bare metal and then sprayed and cooked it with heat resistant paint.

it has held up fairly well but having ridden pretty much every day through winter, rain, ice, snow and slush has brought out the rust quite badly again.

Can anyone recommend the best way to prevent the rust?
I guess I'll never be able to stop it completely but i would prefer it to last a bit more than a year before going rusty again.

I was thinking zinc plating or something?
I certainly don't want to be doing it myself as I have wasted much money on VHT paint and rust proofing just to find it burns and flakes off Sad

Cheers!
Rich
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Itchy · Super Spammer Joined: 07 Apr 2005 Karma :

No can do lest you change them for decent stainless pipes, the problem is with mild steel is you can blast them clean them up spray them with HT temp paint even wrap them if you are crazy.

But exhaust gases are corrosive and unless you are running something like a ThunderAce (which burns 50ml of oil ever 100km) then you can't protect it from the inside.
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prawny1 · World Chat Champion Joined: 28 Jun 2005 Karma :

Ceramic coating is supposed to be good for rust proofing but is a specialist process, Some people are going down the ceramic route for streetfighters etc too so might be considered a bit tarty.
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Walloper · Super Spammer Joined: 24 Feb 2005 Karma :

The exhaust will heat up to over 500 deg C on full chat.
The heat-cold cycles due to water spray on the hot pipes will shock any coating off the pipes over time.
If you are suffering with the image this creates for you then suck in and buy a stainless system.

Smile

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stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

They also tend to rot from the inside out.

Combustion of petrol produces water and carbon dioxide. Water and carbon dioxide react to make carbonic acid. Carbonic acid is an oxidising agent which supports the corrosion process.
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Ingah · World Chat Champion Joined: 10 Apr 2009 Karma :

Is there not a product you can periodically spray in the exhaust that could help prevent it rusting from the inside?
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Walloper · Super Spammer Joined: 24 Feb 2005 Karma :

chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

Walloper · Super Spammer Joined: 24 Feb 2005 Karma :

chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

My point still stands, its not splitting hairs, if the standard system is mild steel, you could get a stainless aftermarket one for cheaper.
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Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

You could possibly get it plated and that will make it last better than a normal unplated mild steel exhaust, but it won't be that good and I doubt anyone would plate a used exhaust.

Plenty of places around who can make up a stainless exhaust.

All the best

Keith
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chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

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Walloper · Super Spammer Joined: 24 Feb 2005 Karma :

chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

Just wondering how you got so much sand in your Vagina. Thumbs Up

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Well, you know what they say. If you want to save the world, you have to push a few old ladies down the stairs.
Skudd:- Perhaps she just thinks you are a window licker and is being nice just in case she becomes another Jill Dando.
WANTED:- Fujinon (Fuji) M42 (Screw on) lenses, let me know if you have anything.

Robby · Dirty Old Man Joined: 16 May 2002 Karma :

You can get exhaust ceramic coated inside and out, but it's not cheap. Pops up in bike mechanics from time to time.

Vincent · Banned Joined: 16 Oct 2006 Karma :

There are places that will still re-chrome used pipes, even expansion chambers. I have the details of one near Bedford if any use.

Some of their work:-

https://i77.photobucket.com/albums/j71/Drewskovitch/rechromedmicrons.jpg

Walloper · Super Spammer Joined: 24 Feb 2005 Karma :

Walloper · Super Spammer Joined: 24 Feb 2005 Karma :