Think you will find a lot depends on the strength of the phoisphoric acid. Aslo things like milk stone remover may contain other chemicals to assist the removal (of limestone). I have used "Metal cleaner & restorer" by Swafega (a phosphoric acid product) but that can be expensive. B&Q use to stock it but then stoped and had it on clearence dirt cheep but I mised out on the good price! I did manage to get one of the two box packs some timeback (2x 5lts) for for less than what most on ebay are selling just the one 5ltr.You're right, some things you can't unsee!the
Milkstone remover is phosphoric acid, although that would be for stainless steel, I hear you say, which is a fair point.
Well that answer left me feeling unsafe and deeply offended, so not a bad effort.It was milkstone remover I was using, slightly diluted! I've tried using it neat as a dip to remove the zinc before welding galvanised but it seems to quickly get neutralised!
Trying to think of an insult but this is the best I can do.
I have a newfound respect for citric acid now though.
It doesn't really. The fizzing is normal.Take care if using it on cast iron/steel. I used hot citric to clean up brake calipers & it fairly fizzes & I would think it would cause damage if left too long.
It doesn't really. The fizzing is normal.
The only thing I don't like about using citric is the steel goes black and then you have to spend ages cleaning it up with wire wool.
It is black oxide, from he removal of the O2 from the rust.Perhaps the blackening is dependant on the carbon content of the material, ie the carbon is left behind?
Perhaps the blackening is dependant on the carbon content of the material, ie the carbon is left behind?
It is black oxide, from he removal of the O2 from the rust.
Typical - was hoping to give it a try!Hence why using electrolysis suffers the same result.
Typical - was hoping to give it a try!
So are you heating the solution too, looks like an element in the tank?I'd agree with that wholeheartedly, at least from my experience. Things like plane blades go really black and the hardened edges thin down really quickly if you don't keep an eye on things.
So are you heating the solution too, looks like an element in the tank?
I guess the strength, time in and temperature all make a difference as well as the material.