Best Way Of Dissolving Rust?

[plumbandplumber]

I recently changed the plate hex on my combi, and want to keep the old one for a spare for the future - just in case. However, the reason I swapped it was because it's got lots of rust flakes in it from my 55 year old system. Filter now fitted.

I thought of leaving the hex for a few months with a strong saline solution sitting inside it, but will the salt damage the hex? Or is there something better/quicker that will dissolve the small rust flakes and not harm the hex?

 

[tamz]

Spirits of salts (hydrochloric acid). Google it. Under a fiver a bottle but don't leave it in for more than a few hours.

 

[gasmanrob]

Don't leave it more then 30 seconds have you seen what that does to stainless steel.

 

[tamz]

Lol :lol:

 

[SimonG]

Coca cola, full fat

 

[Billy Bob Bob]

prosperhic acid also works well,also dont leave that in long,or get any near any skin/eyes/other sensitive areas

 

[gassafe]

Kamco fx2 maybe?

 

[julesverne]

I use spirit of salts for a few minutes rubber gloves a must .Also used vinegar heatted up with blow torch. Thoroughly flushed with clean water.

 

[stevetheplumber]

if its rust flakes you can get a lot of it out just back washing with a hose and lots of tapping

 

[plumbandplumber]

Ok thanks to all for your suggestions. Will try one or two. So it looks like I should forget the salt idea?

Also, which type of metal is the Turbomax's plate hex made out of?