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Old 12-08-2018, 06:37 PM   #1
Tone
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Rusty Stainless exhaust

Hi all. I've just purchased a used stainless exhaust and wanted to remove as much surface rust as possible.

I've tried wire-wool with the Britemax twins and then Autosol on the central rust spot. Is there anything more effective, either mechanically or chemically, to remove said rust?

Thanks

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Last edited by Tone; 14-08-2018 at 03:27 PM.
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Old 13-08-2018, 09:20 PM   #2
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I’ve always just used autosol on things like this. Just time and patience
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Old 14-08-2018, 12:49 PM   #3
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Thanks for the reply Ollie. Using autosol with fine wire wool doesn't seem to touch the large thick rust patches. Think I'll give BH Deox Gel a go
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Old 14-08-2018, 02:51 PM   #4
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This might sound odd, but have a look around the net about using Harpic. Yep, Harpic. It's incredible at removing rust from metals and staining. Apparently, it has to be the black bottle.

Otherwise, the deox should work magic on it.

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Old 14-08-2018, 03:26 PM   #5
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Not odd at all Cookies...

It does work pretty well on rust. Left on for 10 minutes, then scrubbed with scourer and washed off. This is probably the worst rust I've seen on a stainless finish

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Old 15-08-2018, 12:58 AM   #6
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Quote:
Originally Posted by Tone View Post
Not odd at all Cookies...

It does work pretty well on rust. Left on for 10 minutes, then scrubbed with scourer and washed off. This is probably the worst rust I've seen on a stainless finish

That reminds me of when I'd just bought a house and the loo was caked with limescale. I hit it (very, very carefully) with some concentrated hydrochloric acid from my lab. It was interesting! Did the job though.
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Old 15-08-2018, 03:46 AM   #7
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Originally Posted by Tone View Post
It does work pretty well on rust. Left on for 10 minutes, then scrubbed with scourer and washed off. This is probably the worst rust I've seen on a stainless finish
I'm glad this worked for you but if the exhaust was really stainless it wouldnt have rusted in the first place. It must be made of mild steel, not stainless.
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Old 15-08-2018, 07:20 AM   #8
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From the British stainless steel association.

Quote:

Does stainless steel corrode?

Although stainless steel is much more resistant to corrosion than ordinary carbon or alloy steels, in some circumstances it can corrode. It is 'stain-less' not 'stain-impossible'. In normal atmospheric or water based environments, stainless steel will not corrode as demonstrated by domestic sink units, cutlery, saucepans and work-surfaces.

In more aggressive conditions, the basic types of stainless steel may corrode and a more highly alloyed stainless steel can be used. See Corrosion Mechanisms in Stainless Steel

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Old 15-08-2018, 10:21 AM   #9
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you can see it is definitely stainless, but as Cyclonetog posted a lower quality one, less Chromium, Nickel and other components to reduce costs,

Bar Keepers Friend will clean stainless and probably the safest way, but wouldn't use wire brush or wire wool it can imbed more mild steel, or caustic chemicals that will damage the chromium protection and make it worse in future, but that one is so bad it maybe beyond that already,

I can't see in pics but some exhaust manufacturers weld the joints with mild steel wire, so maybe worth treating or painting them too

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Old 15-08-2018, 11:31 AM   #10
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Quote:
Originally Posted by SunnyBoi View Post
I'm glad this worked for you but if the exhaust was really stainless it wouldnt have rusted in the first place. It must be made of mild steel, not stainless.
Stainless can rust. There are many different types to suit particular applications.
Take a look at a chimney liner that has been burning solid fuel. It is why you get different grades of stainless, 316 corrodes faster than 904
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