Thanks Marte, just not sure where I would of sourced Phosphoric acid way down here in a small town & daresay a bit more risky re health & disposal. Have tank filled with white vinegar so couple of days and should know how successful it has been . Many thanks to everyone for advice.
marte,
Nov 22, 6:51am
There's a plant nursery in Invercargill that has it. Though it's a big shop with hydroponics & pet supplies too. I think now that it was $10 for 500 mls.
It will remove rust, I first used to to remove rust specks & grit off Stainless steel ( I used the angle grinder too close to some Stainless frames & a week later they were covered in rust patches & specks ) It did a amazing job. At home I used it for similar jobs & used it to clean some stained Stainless steel pots. It bought it back to new condition, some heat helped. With heat it's got a slightly fowl smell to it, but it works !
Also, a drop of it in a teaspoon of water & tasted, tastes just like the tangy taste of Coca-Cola. For disposal? Just pour it down the drain, it's food grade, just like vinegar. I would use it straight in the tank, then once its done it's job, add water & pour it out, then rinse twice, neutralize with baking soda/water & two rinses & two of Meths. Let Dry.
Long term. Use a motorcycle tank liner product. It's a 2 pack prep liquid. Por-10 or similar.
Im interested to hear what the vinegar does. Iron acetate is water soluble.
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