Rust Protection for SS Exhausts

[CB7Nub]

I got a custom full SS MIG exhaust welded up and I'd like to protect the weld's against rust. I live in Canada so rust is imminent for the welds.

What can I do to protect the welds, long term if possible?
Looks I don't care about.

I have put WD40 but that gets washed off after rain, so something more permanent would be better.

[mtnbikaah]

BBQ paint?

paint the whole exhaust because the stainless will rust too, in time.

[cloudasc]

BBQ paint?

paint the whole exhaust because the stainless will rust too, in time.

Good SS should not rust at all. The cheap lower grades can rust due to the impurities like iron. So if you can take a magnet to it and not feel the magnatism, it really shouldn't rust.

[mtnbikaah]

sure stainless rusts, it just takes longer.

but it's not worth arguing about.

[TypeG]

So if you can take a magnet to it and not feel the magnatism, it really shouldn't rust.

that isn't true. SS is ''magnetically soft'' and can be given magnetic properties though cold rolling-working ect.

but i agree, good SS shouldn't rust...unless it is contaminated or stained by other metals. later.

[cloudasc]

that isn't true. SS is ''magnetically soft'' and can be given magnetic properties though cold rolling-working ect.

That is true, thank you for the correction; though the magnetic effect is only temporary (that's what the "soft" means). So unless it was "fresh off the line", or exposed to a significant magnetic field recently it shouldn't be magnetically attracted from my understanding, if it is its caused by iron content in most cases. I'm referring to standard magnets, like a pen magnet, not supermagnets, or electro magnets. I've seen scientific videos of electromagnets being used to levitate a living rat.

[Nyne521]

i think you guys are missing the point... he wants to protect his WELDS! and what i would do is give the welds a little coat of rhino liner

[cloudasc]

What would help would be clarification to what wire was used for the welds. If the proper wire was used, the op shouldn't have any rust problems from my understanding.

A ceramic coating might help, although its most likely not as cost effective as other options, but could add few extra hp in the process.

[Nyne521]

What would help would be clarification to what wire was used for the welds. If the proper wire was used, the op shouldn't have any rust problems from my understanding.

A ceramic coating might help, although its most likely not as cost effective as other options, but could add few extra hp in the process.

really?... a few hp? i doubt it would even be that much... but i suppose it depends also on the mods he has but a stock f22 little if any at all... i know it's supposed to increase flow some how but i don't see how, i understand the heat dissipation

[cloudasc]

A ceramic coating keeps the exhaust heat in, which keeps the exhaust gasses hot and moving fast out of the exhaust system, which helps with the scavenging effect, where the exhaust gasses traveling/exiting the exhaust are helping pull the next combustion event(s) through the exhaust. It would be like wrapping the entire exhaust system in heat/header wrap. Keyword there is "could".