brake caliper cleaning experiment

[Frankie]

I bought this stuff to try,non toxic non corrosive just soak for 24/ 48 hrs and rust should be gone took the caliper off but 1 liter is not enough to cover in a bucket,so we'll see the side that's made contact if it works get more gear.I'LL let you know how it works.
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[Frankie]

just been out to have a look at the progress something is happening gave it a bit of an agitate with a plastic flour brush, That's about 18hrs will check in the morning see how it is Frankie.

 

[easy]

keep us posted lets hope you dont get left with a piece of metal the size of a 10p

 

[Frankie]

spoke to the fella he said non toxic non corrosive only eats rust just wish I could have submerged it only get half still only an experiment . Frankie.

 

[the councillor]

one of my most favourite moments in this town, (agreed it proves how sad i am but meh to all that) involved going into the londis, as a known eco-activist, pro-organic campaigner and all round pain in the arse, and purchasing a gargantuan 3 litre bottle of value cola for the princely sum of 39p. when the till assistant somewhat delightedly enquired whether or not i was going to be giving it to my boy to drink (the mere thought of his pristine digestive tract being sullied by anything other than naturally ripened organic avocados mashed with just a soupcon of freshly squeezed, locally grown lemon and a hint of chopped parsley makes me feel quite faint) i was able to reply, "no, i'll be using it to clean up an old seagull i found at the tip" completely truthfully :roll:

i dunno if that's relevant to the original post but never mind

might it have been an idea to dismantle the caliper first ? lots of nooks and crannies to explore, it'd sit flat on the bottom of the bucket plus what's the liquid (assuming it's not panda cola) gonna do to your seals ?

but what do i know ?

a good seagull anecdote, that's what.

as an aside, how do you type a cedilla

 

[noddy]

Ive used some think called brick acid/mortar stain remover from builders merchants, its got sulfuric acid in it takes rust off a treat, only used it on things like castings and carb bodies but it works well. (if you do dip a carb dont leave it in too long the zinc).

 

[Frankie]

having left it in for 4o ish hrs it came out yes rust has been removed if I left it in for say a week then it would be better but its no better than 30 mins of sand blasting and blasting is cheaper and quicker
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[Frankie]

cant get pic up .

 

[uber cool]

here you go :mrgreen:

 

[Frankie]

If it was just surface rust it would be ok but deep rust??.for me it is a fail but for someone else it may be a pass who knows.cheers Frankie

 

[Guest]

non toxic / non corrosive? shouldnt damage seals and looks like some sort of rust convertor like tannic acid or an alkali metal dihydrogen citrate and citric acid.

The phosphoric acid in cola will eventually dissolve your caliper but that would take an eon but does work fairly quickly to remove surface rust. It works great on ferrous compounds but even better on calcium, leaching it from bones if enough is injested

 

[Frankie]

it was white wizard don't know whats in it but it did work just takes to long on heavy rust and did not rot rubber Frankie.

 

[james_stan]

Hmm

Coincidentally I did a pair of calipers in a bucket of citric acid crystals (diluted) from a mate of
mine that sells the stuff to de-scale commercial sauna equipment,

Similar results actually. I was quite pleased that the deep rust you normally have to chip-off
could be brushed off after 2-3 days. They key is to keep the solution warm if possible and brush component every 12 hours or so.

Handy if you don't have your own sand-blaster.

Cheers

James