scootz
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| posted on 20/6/14 at 07:46 PM |
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Rust on Stainless Steel
The inside of my Quantum (stainless) had been badly painted when I got it, so I stripped it back using a brass wheel and grinder.
Big mistake.... the panels developed a light coating of rust over the winter.  I guess the metal didn't appreciate the use of brass or the
microscopic damage caused during the process.
So how can I fix it (without having to repaint!)?
Would a generous coating of pickling paste on the affected panels be enough to break-down the free-iron and other contaminants and restore the metal
to its former glory?
A thorough polish to finish off?
It's Evolution Baby!
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Minicooper
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| posted on 20/6/14 at 08:02 PM |
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stainless steel does rust, that's normal. Clean it up and polish regularly
David
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madteg
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| posted on 20/6/14 at 08:43 PM |
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Sounds like 304 stainless or a cheaper grade, be very carefull as pickling paste will turn it green. Try on a spot you cannot see.
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madteg
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| posted on 20/6/14 at 08:46 PM |
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Just a thought but had the wire wheel been used on mild steel before, you could have contaminated the stainless with mild steel of the wire brush.
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Chris_Xtreme
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| posted on 20/6/14 at 09:21 PM |
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Both of my xtremes lived/live outside a lot of the time and didn't/haven't rusted.
Which bit is rusting? Got a pic?
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britishtrident
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| posted on 21/6/14 at 11:28 AM |
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quote:
Originally posted by madteg
Just a thought but had the wire wheel been used on mild steel before, you could have contaminated the stainless with mild steel of the wire brush.
As above even swarf deposited from grinding normal steel in proximity to stainless can cause staining of cheaper grades of stainless.
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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scootz
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| posted on 21/6/14 at 12:13 PM |
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Hadn't used the wire wheel on anything else.
It's definitely as a result of my meddling as the car was 7 years old when I got it and it hadn't a spot of the brown stuff.
I've been reading some techie papers and a good chemical clean may restore the surface. Quantum use pickling paste on the tubs after
they've welded them, so I guess it's worth a try.
It's Evolution Baby!
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Chris_Xtreme
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| posted on 21/6/14 at 12:23 PM |
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Just in case, you are not talking about the side panels are you, rather than the tub its self? I'm sure your not....
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scootz
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| posted on 21/6/14 at 01:34 PM |
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The interior panels in the cockpit (floor, rear bulkhead, tunnel).
It's Evolution Baby!
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Chris_Xtreme
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| posted on 21/6/14 at 01:36 PM |
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first extreme had no protection on the floor.. no rust at all... the v8 i have now is fully carpeted! so who knows what is underneath!
good luck.
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scootz
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| posted on 21/6/14 at 01:45 PM |
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You'll be fine Chris. It's my second one and the neither had any rust in a combined period of 10 years.
This has only come about because of the 'aggressive' method I've used to clean the panels.
I'll do a bit more with the wire brush to get all the rust off, chemically clean it, wash it, then finish with a good polish.
It's Evolution Baby!
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907
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| posted on 21/6/14 at 05:52 PM |
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Are you sure your brush is brass?
I bought some small "brass" brushes, and as you see from the pic they stick to a magnet no prob.
"All that glitters is not gold."
Paul G
 
Brass? I don't think so.
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Bigheppy
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| posted on 21/6/14 at 07:22 PM |
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Have a look at this in particular post no3
http://www.worldseafishing.com/forums/boat-owning-equipment-maintenance/2307370-what-stainless-steel.html
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steve m
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| posted on 21/6/14 at 07:53 PM |
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If I was to find rust on a stainless part my first call would be to the company that supplied the part,
My Father in law, who has been in the metal polishing trade for 50+ years has added, if a stainless pieceof metal has gone rusty,
it aint stainless, END
Steve
Thats was probably spelt wrong, or had some grammer, that the "grammer police have to have a moan at
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britishtrident
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| posted on 21/6/14 at 08:26 PM |
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The cheapest grades of stainless steel used to make contract grade stainless steel sinks and the like were dubbed stainless iron by my metallurgy
lecturer.
This stuff can develop rust surface stains very easily
On more than one occasion I have had to clean a sink with phosphoric acid after cleaning steel parts in the sink.
[Edited on 21/6/14 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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Slimy38
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| posted on 22/6/14 at 09:28 AM |
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quote:
Originally posted by steve m
If I was to find rust on a stainless part my first call would be to the company that supplied the part,
My Father in law, who has been in the metal polishing trade for 50+ years has added, if a stainless pieceof metal has gone rusty,
it aint stainless, END
Steve
I've had plenty of 'stainless' exhausts go rusty, albeit a lot slower than a mild steel equivalent. I was under the impression that
the lower grades of stainless can still rust? But conversely the higher grades of stainless can be more brittle? Or is that just marketing bumph used
to sell cheap and nasty exhausts?
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scootz
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| posted on 22/6/14 at 11:46 AM |
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It may not be the stainless that's rusting on my chassis... it may well just be deposits from the 'brass' wheel.
Clean forgot that the roll hoop is mild steel and I attacked that first with the wire wheel before hitting the panels. Oops!
So I'm hoping that a good chemical clean and polish will indeed do the trick!
It's Evolution Baby!
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