Joe K: what is de oxygenated water? If you take the O out of H2O, what's left?
Heh. I wondered if my statement would bring a query - I should have elaborated.
Deionized water is water that has had all the chemical contaminants removed: the calcium, magnesium, other chemical impurities to water. Water is SUCH a good solvent that it picks up chemicals from WHATEVER it touches.
Deionized water is good water for use in a boiler since it leaves behind little or none of these contaminants as it boils away. (There is not really a perfectly "pure" water since water is such a good solvent.)
Likewise, deoxygenated water is good water to use in a boiler since it provides little oxygen to promote boiler corrosion. And natural (atmospheric) water is oxygen rich. Water by its nature picks up dissolved oxygen from the air until a balance of sorts is reached.
Heating water changes this balance point: by heating water to near it's boiling point you reduce dramatically how much entrained dissolved oxygen is contained in the water.
Similarly to deionized water, there is not really a totally deoxygenated water - there is always a balance and some oxygen remaining. Plus, on exposure to the air and at room temperature water is quick to re-establish a new higher balance.
In commercial boiler systems, the "deaerator" normally runs from 15 to perhaps 85 psi and is part of the water supply system for the boiler (feedwater system) It's primary role is to provide a place for any dissolved oxygen to "percolate off" and escape back to the atmosphere. This why most power plants and district heating plants will have a single pipe, usually fairly small, which seems to have a wisp of steam issuing forth - not much steam but more this is where the air makes it's way after leaving the water contained in the deaerator.
For us, we really don't have access to a deaerator. Instead we may bring water nearly to the boiling point in an open vessel. This is about the best you can do to "deaerate" water at atmospheric pressure.
There are chemicals (oxygen scavengers) that can reduce the entrained oxygen further, but mostly these are not too safe for home use (hydrazine - a commonly used chemical - has been found to cause cancer in rats) These also scavenge oxygen from your skin causing chemical burns.
So if you wish to do as I recommend, I would simply bring a large pot of water to a boil, let it do so for perhaps 10 minutes, and then bring the water to your phos-coated part and "ladle" (not pour) the water onto your part to rinse it off while it is still nearly at the boiling point. Pouring and splashing aids the pickup of atmospheric oxygen by the hot water - pouring slow without an air gap as in the use of the ladle is probably the best you can do.
Or you can dip the part into the boiling water and swish it around for mechanical agitation - if it will fit in the pot.
The heat of the hot water will help your part dry quickly after it has been rinsed.
Hope this helps - a lot of explanation to explain a simple concept? Sorry for that.
An engineering mind CAN be a social liability.
Joe K
