I was given a 6 gallon heavy-gauge Nissan steel gas can for marine use in excellent condition on the outside, but which has rust on the inside.
First question is obvious - why do they make gas cans out of steel which
will rust? Why not put some paint or epoxy on the inside so it won't rust?
Second question is more important (since they made it, and it rusted
inside) is can it be saved? The entire inside is rusty, but just fleshy
rust. I've flushed it with water a lot but the rust is still on the metal.
I guess I could use phosphoric acid but is there any harm to using gas that comes from a can that has surface rust covering the entire inside surface?
On 4/20/2023 12:09 PM, Minoru Osaka wrote:
I was given a 6 gallon heavy-gauge Nissan steel gas can for marine use in
excellent condition on the outside, but which has rust on the inside.
First question is obvious - why do they make gas cans out of steel which
will rust? Why not put some paint or epoxy on the inside so it won't
rust?
Second question is more important (since they made it, and it rusted
inside) is can it be saved? The entire inside is rusty, but just fleshy
rust. I've flushed it with water a lot but the rust is still on the
metal.
I guess I could use phosphoric acid but is there any harm to using gas
that
comes from a can that has surface rust covering the entire inside
surface?
I wonder if a rust converter would produce a gas resistant protection.
It could be worth contacting the manufacturers of a couple such products.
First question is obvious - why do they make gas cans out of steel which
will rust? Why not put some paint or epoxy on the inside so it won't rust?
I was given a 6 gallon heavy-gauge Nissan steel gas can for marine use in excellent condition on the outside, but which has rust on the inside.
First question is obvious - why do they make gas cans out of steel which
will rust? Why not put some paint or epoxy on the inside so it won't rust?
Second question is more important (since they made it, and it rusted
inside) is can it be saved? The entire inside is rusty, but just fleshy
rust. I've flushed it with water a lot but the rust is still on the metal.
I guess I could use phosphoric acid but is there any harm to using gas that comes from a can that has surface rust covering the entire inside surface?
I guess I could use phosphoric acid but is there any harm to using gas
that comes from a can that has surface rust covering the entire inside surface?
I guess I could use phosphoric acid but is there any harm to using gas that >> comes from a can that has surface rust covering the entire inside surface?
I wonder if a rust converter would produce a gas resistant protection.
It could be worth contacting the manufacturers of a couple such products.
On Thu, 20 Apr 2023 15:14:21 -0700, Bob F wrote:
I guess I could use phosphoric acid but is there any harm to using gas that >>> comes from a can that has surface rust covering the entire inside surface? >>I wonder if a rust converter would produce a gas resistant protection.
It could be worth contacting the manufacturers of a couple such products.
I actually had thought about that when I remembered that I had an old jar
of phosphoric acid in my chemistry kit which I haven't opened up in years.
I ran an experiment on an old rusty pair of shears left outside too long.
The phosphoric acid turned the metal from pure rust to black "something".
I don't know what that "something" is, but it's black, whatever it is.
I guess I was supposed to wash it off but I just left it on.
Is it too late to wash it off two days later?
The black is all dry now. Not wet. I guess I can scrape it off. Maybe.
I'm thinking maybe I can pure some of the thick clear phosphoric acid into >the gas can and shake it around, but I only have about two ounces left.
I've had it in a labeled glass jar for so long I forgot how I acquired it.
The black coating is iron phosphate which is much more
stable than iron oxide. That's a common treatment for bare
steel before painting and not very different from other
stable surface treatments such as gun blue.
I have no idea if that's a good idea for a gas can.
There are tank coating systems which are excellent: https://por15.com/collections/all/products/fuel-tank-repair-kit
Usually used where an original replacement tank is rare or
expensive.
For a six gallon portable tank you could replace
it with a brand new steel tank for less money and time: https://www.2040-parts.com/6-gal-metal-steel-marine-outboard-gas-fuel-tank-w-new-primer-hose-johnson-i2258727/
(polyethylene tanks are about $20 less)
On Thu, 20 Apr 2023 15:14:21 -0700, Bob F wrote:
I guess I could use phosphoric acid but is there any harm
to using gas that
comes from a can that has surface rust covering the
entire inside surface?
I wonder if a rust converter would produce a gas resistant
protection. It could be worth contacting the manufacturers
of a couple such products.
I actually had thought about that when I remembered that I
had an old jar
of phosphoric acid in my chemistry kit which I haven't
opened up in years.
I ran an experiment on an old rusty pair of shears left
outside too long.
The phosphoric acid turned the metal from pure rust to black
"something".
I don't know what that "something" is, but it's black,
whatever it is.
I guess I was supposed to wash it off but I just left it on.
Is it too late to wash it off two days later?
The black is all dry now. Not wet. I guess I can scrape it
off. Maybe.
I'm thinking maybe I can pure some of the thick clear
phosphoric acid into
the gas can and shake it around, but I only have about two
ounces left.
I've had it in a labeled glass jar for so long I forgot how
I acquired it.
I ran an experiment on an old rusty pair of shears left outside too
long.
The phosphoric acid turned the metal from pure rust to black
"something".
I don't know what that "something" is, but it's black, whatever it is.
I was given a 6 gallon heavy-gauge Nissan steel gas can for marine use in excellent condition on the outside, but which has rust on the inside.
First question is obvious - why do they make gas cans out of steel which
will rust? Why not put some paint or epoxy on the inside so it won't rust?
Second question is more important (since they made it, and it rusted
inside) is can it be saved? The entire inside is rusty, but just fleshy
rust. I've flushed it with water a lot but the rust is still on the metal.
I guess I could use phosphoric acid but is there any harm to using gas that comes from a can that has surface rust covering the entire inside surface?
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