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Message started by zevenenergie on 01/06/24 at 10:11:02

Title: Diy evaporust
Post by zevenenergie on 01/06/24 at 10:11:02

I often have something to remove rust and I usually use phosphoric acid.

I think evaporust is a nice product, but it is also expensive.
Here in Europe I pay more than 60 dollars a gallon.
It will probably have to do with import duties.

In this video someone makes a DIY evaporust for $0.70 per gallon.

https://www.youtube.com/watch?v=f9kBdJQMPPI

Title: Re: Diy evaporust
Post by verslagen1 on 01/06/24 at 12:57:08

1# Tetrasodium EDTA $23.22 = $1.45/oz $.05/gram
1 oz = 28 grams

formula DIY evaporust
5 grams EDTA
100 ml water
citric acid buffer solution to 6 or 7 ph
dishwashing liquid ? drops

roughly $.26/100 ml

vs, Evaporust $28.47/gal

1 gal = 3785 ml

$.75/100 ml

I did not include shipping.

Title: Re: Diy evaporust
Post by TheSneeze on 01/06/24 at 21:28:12

Evap-o-rust works great. Just be warned, it outgasses when it's working. I used it on a fuel tank and had it sealed. It ballooned the tank. Always leave that stuff vented while using.

Title: Re: Diy evaporust
Post by Dave on 01/07/24 at 04:22:31

130C292E242D21322B400 wrote:

Evap-o-rust works great. Just be warned, it outgasses when it's working. I used it on a fuel tank and had it sealed. It ballooned the tank. Always leave that stuff vented while using.

Wow....I didn't know that. I have put rubber plugs in fuel tank neck holes and not had a problem.

It works much faster if you can get it warm/hot. Above 70 degrees is good.....setting it in the sun and getting it hot to the touch is even better. Having the fuel tank full is better than partially full - although you can roll it around and keep the interior surface wet and that will also work......adding a handful of drywall screws and shaking helps to remove the rust as well (The drywall screws and shaking works best with only a small amount of Evaporust inside).

I rinse the tank with E85 from the gas station - as rinsing with water always seems to cause flash rust on the clean steel.