Flash rusting?

Bech

I wash the cylinders several times with as hot as possible water, and one last time with acetone (which evaporate in contact of the inner warm cylinder) and I blow the acetone damp out with hot air via a long steel pipe in the cylinder.
I live the cylinder for 24 hours in a dry place, than put 50 bars of air in (to be sure the last damp go out), I emty the cylinder and it's ready.

PS : don't put acetone in contact with the outside paint ...

Raph

jradomski

wouldn't trust acetone for anything I plan to breathe..

This blurb on wilkipedia says it all


Acetone is an irritant and inhalation may lead to hepatotoxic effects (causing liver damage). The fumes should be avoided. Always use goggles when handling acetone; it can cause permanent eye damage (corneal clouding).
Small amounts of acetone are metabolically produced in the body, mainly from fat. In humans, fasting significantly increases its endogenous production (see ketosis). Acetone can be elevated in diabetes. Contamination of water, food (e.g. milk), or the air (acetone is volatile) can lead to chronic exposure to acetone. A number of acute poisoning cases have been described. Relatively speaking, acetone is not a very toxic compound; it can, however, damage the mucosa of the mouth and can irritate and damage skin. Accidental intake of large amounts of acetone may lead to unconsciousness and death.
The effects of long-term exposure to acetone are known mostly from animal studies. Kidney, liver, and nerve damage, increased birth defects, and lowered reproduction ability of males (only) occurred in animals exposed long-term. It is not known if these same effects would be exhibited in humans.

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Joe Radomski
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All posts are personal opinions and DO NOT reflect any affiliated agency unless specifically stated.

seppu

hai
maybe from Home tank protect.
gruss sepp

jaap

If it works it works.

But...what grade of acetone do you use? If its not very pure there is always the chance that you may introduce more combustible contaminants that will stay once the solvent has evaporated...

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steevke

They have one in Belgium too (HTS EUROPE) but they don't supply that particular cleaner (Blue Gold Industrial Cleaner) anymore.

steven

rjack

Nonylphenol ethoxylates are used worldwide as degreasers. Historically one of their major UK uses was wool washing.

I don't believe they have been banned anywhere. I don't think REACH has gotten to them yet.

The ethoxylates break down to 4-nonylphenol. This degradation product can mimic the hormone estrogen, although it is about 2,000 times weaker in potency (depending on the species and test protocol).

I have heard rumors that Simple Green is primarily nonylphenol ethoxylates. Unfortunately the label does not provide any specifics - "proprietary"

I clean steel cylinders with simple green and the hottest water my heater makes. Blow dry immediately with scuba air (-40C or lower dewpoint). I don't get flash rust.

Richard

seppu

hai
tank protect is # pysiologisch unbedenklich #. you can drink it.
gruss sepp

Dutchy

Who cares . If what you say is true (and I dont doubt that) then you can still buy it illegally in several Dive Shops in the Netherlands. There's at least one not to far away from you....

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steevke

No need to doubt: check out the directive 2003/53/EC.

Now seeing that endocrine disruptors may cause cancer (testes & prostate) and that I value my sex life I prefer using a product containing no or at least less NPE's ...

Steven

rjack

And how do you know that Tramos doesn't have NPEOs too?

I read the link you posted earlier. Not very helpful to knowing its composition.