What is the best way to clean old equippment.

[AndyL]

Muriatic acid can be found at rona; just ask in the paint area - used to prep concrete floors to receive paint.

Everything depends on the concentration - the muriatic acid you can buy at the hardware store isn't by any means pure... Still need to be careful, but no you're not going to end up in the hospital if used correctly.

[hillegom]

I had some muriatic acid once, used it to remove concrete from a rock wall. It dissolves
the concrete binding agent and leaves you with sand.
But I can't remember. If you want to dilute it, do you add water, or do you add the acid to the water. I remember there is a big saftey issure here, if you do it incorrectly,

[banditpowdercoat]

Acid to water, that way, if you splash, the water splashes not the acid.

Also, if there is a reaction, adding the acid first makes it start out REALLY diluted. If you add water to the acid, the concentrations are reversed

[TrailFish]

Try pickling vinegar it is a couple of percent stronger (7% vs 5%) and about the same cost.

[ALBERTA REEF]

Ok I have tried everthing except Muriatic acid (AKA hydrochloric acid). I like to be on the safe side of things. I found the safest way is to use pickling vineger 7% with a heater and a pump. Works the best. thank you for all the advise.