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Thread Like Summary
Allan G, Beach, Jon W. Whitley
Total Likes: 3
Original Post (Thread Starter)
#827616 10/24/2020 10:24 AM
by Bry
Bry
I have a bit of corrosion inside the fuel tank of my Velocette MSS and am considering options for removal. I am not planning on lining the tank, unless I need to (e.g. if the rust removal process results in a leak) but hopefully this won't be the case as rigid frame Velo petrol tanks seem to be of a relatively heavy gauge of material and the rust is not excessive.

As I see it, after washing out with detergent and shaking with some abrasive media inside (e.g. plasterboard screws, length of chain, etc.) my options are a follows;

- Electrolysis
- Fill with acid (e.g. vinegar) then passivate with baking soda solution
- Use a commercially available proprietary environmentally safe water based product (e.g. Evapo-rust, Frost rust remover)

I'd be interested to hear of experiences people have had with these methods or advice on better alternatives.
Liked Replies
by Dick Page
Dick Page
I have used evapo-rust before on fuel tanks and was pleased with the results.
1 member likes this
by kommando
kommando
- Electrolysis

Works but messy

- Fill with acid (e.g. vinegar) then passivate with baking soda solution

Citric acid is my preference but vinegar would work. Phosphoric acid will leave a thin layer of dense Iron phosphate which acts like the aluminium oxide on aluminium, not sure if the baking soda would passivate this layer.

- Use a commercially available proprietary environmentally safe water based product (e.g. Evapo-rust, Frost rust remover)

Being a chemist at one time I just read the MSDS and buy the product by its chemical names at 50% of the price. Most rust removers are phosphoric acid based.
1 member likes this
by KC in S.B.
KC in S.B.
+ 1 Jon. Citric acid. Simple, works , cheap, won't kill you. I will add: auto parts sells rubber expanding freeze plugs that will fit the tank opening. Do be sure to make provision for removal!
1 member likes this
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