Rusty pipes

 


Ancient CBR600. Came with black exhaust, swept-under, 4-into-1.
Lasted better part of 20 years. Now sort of lightly rusted.

Years ago I used to prep/repaint my old Yama vert-twin (local made)
pipes with hi-heat paint every 4-6 years. The surface prep was a
monumental PITA, and, short of an acid-bath or somesuch, it never
got all the rust, etc, etc.

For me, rusted pipes are kinda like rusted tools: something ya really
don't wanna tolerate. But there must be an easier way than what I was
doing.

What do folks do with painted pipes when they rust?

  Prost,
  Puddin'

"Law Without Equity Is No Law At All. It Is A Form Of Jungle Rule."

 



Paint 'em with barbecue black from a spray can.

What about powder coating? Is it heat resistant?

 

1949 Whizzer wrote:

I would think if they're rusted on the outside they're rusted inside
too, maybe that affects engine behaviour.  Haven't tried it myself but
some people say electrolysis works eg.,put a mixture of water and
washing sode in a plastic tub, with some thick old electrical wire
suspend the parts, connect the postive end of a dumb trickle charger to
a thick piece of ferrous metal such as an old railway spike and the
negative end to the part  Don't know  how long it takes nor the correct
mixture but people say that you can see the rust coming off the part.

I've used an acidic mixture called evapo-rust for an internal tank
(unpainted), a couple of racks, and lots of small rusted parts.  Cost
about ten bucks a litre, re-usable and safe to flush down the drain.
The part needs to be submerged for a number of hours, so for the racks I
used a plastic tub tilted up and shifted the racks around so that each
section was submerged for a couple of hours.  This saved buying a
hundred bucks worth of the stuff.  You have to be careful to only put
ferrous parts in the stuff as it can wreck plastics or zinc, not sure
about aluminum and brass.

 



You'd think wrong. Unless the bike has been laid up for many years with
no use.

The interior of an exhaut header pipe is a fairly hostile environment,
and rust doesn't like it. And, to state the bloody obvious, things rust
in a damp environment and the inside of an exhaust pipe isn't damp.

Silencers rust from the inside out, yes. Especially if the bike is only
used for short trips and doesn't get hot enough to evaporate all the
water that the combustion process produces. This collects in the
silencer.

But there's a different between exhaust "pipes" and "silencers", so it
depends what component you're tallking about.


--
BMW K1100LT  Ducati 750SS  Honda CB400F  Triumph Street Triple
Suzuki TS250ER  Coo, down to just five bikes!
If you don't know what you're doing, don't do it. And RTFM.
chateau dot murray at idnet dot com

 



All the insides of header pipes that I've seen were coated with
carbon, nary a hint of rust visable.


Thanks. I'm now looking into this approach. I got this big plastic Muck
Bucket that might be big enough. That and my trickle charger might
make it practical.

  P

"Law Without Equity Is No Law At All. It Is A Form Of Jungle Rule."