Rust removal

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YING

YING

Pittsboro,NC
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Any suggestions on how to get rust off a side cover (left side tool slot) ? The bead blaster nozzle could not fit into that area and I want to get it prepared properly.
Thanks,Mike
 
Critic acid, buy in powder form as its cheaper. Easily dissolves in water and safer than most other acids.
 
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Citric acid works a treat, especially for rusty fuel tanks internally

ELLIS.
 
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I just received some stuff off ebay, 10litres ‘rust remover’ from flowchemuk. I soaked a load of manky nuts and bolts in some earlier and it really worked well. I’ve yet to try any large items but it seems pretty good so far.
 
Cleaning strength vinegar should also work quite well on surface rust....EvapoRust/MetalRescue are good, but expensive. At least they can be re-used many times.
 
Phosphoric acid removes rust and tends to passivate the steel surface, so the clean surface does not rust again so easily
Phosphoric acid is known as 'food acid'. It is the acid in Coca Cola. When is dilute, it derusts quickly.
 
I've used phosphoric acid many times over the years. It does work well, but it will etch the steel. As a test, I once left a piece of old mudguard in a 50/50 concentration of the acid. After a week, half of the mudguard wasn't there......

You can dilute it as much as you like, of course!

Recent legislation changes mean that you can't buy it in the UK now in anything but tiny quantities, and it costs a fortune.

I'll try some of the 'environmentally friendly' rust removers when I've use up my acid.
 
ELLIS said:
Citric acid works a treat, especially for rusty fuel tanks internally

ELLIS.
Click to expand...
I have used citric acid to great effect
I filled a dustbin with water and 2kg of food grade citric acid crystals
Then just leave whatever I want derusting in the bin overnight
Then just wash the rust off
I was amazed how well it worked
 
I used white vinegar. It worked well, but allows flash rust when you wash it off. I think the phosphoric acid treatments are more resistant to this.
 
Phosphoric acid attacks the last surface of the iron/steel and creates a layer of iron phosphate, this protects the steel from moisture so short periods. Similar but not as effective as the aluminium oxide that forms on aluminium alloys and stops further corrosion.
 
Recent legislation changes mean that you can't buy it in the UK now in anything but tiny quantities, and it costs a fortune.

Didnt know this, and recently bought a jug. Guess I better guard it with my life.
 
kommando said:
Someone needs to tell ebay then

www.ebay.co.uk

Phosphoric 75% Orthophosphoric rust remover ph adjuster sanitiser FREE P&P | eBay

Find many great new & used options and get the best deals for Phosphoric 75% Orthophosphoric rust remover ph adjuster sanitiser FREE P&P at the best online prices at eBay! Free delivery for many products.
www.ebay.co.uk

I have two 5L containers full, enough for a couple of lifetimes.
Click to expand...
1litre for £20 and only 75% concentration.
Last year, 5 litres of 100% cost £20.
 
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