[pure-silver] Re: Deionized Water-Advantages & Sources?
- From: "Koch, Gerald" <gkoch02@xxxxxxxxxx>
- To: <pure-silver@xxxxxxxxxxxxx>
- Date: Thu, 6 Apr 2006 14:06:08 -0400
Often the water for boilers has to be artifically hardened when the
available water is too soft.
Jerry
-----Original Message-----
From: pure-silver-bounce@xxxxxxxxxxxxx
[mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Richard Knoppow
Sent: Thursday, April 06, 2006 1:50 PM
To: pure-silver@xxxxxxxxxxxxx
Subject: [pure-silver] Re: Deionized Water-Advantages & Sources?
----- Original Message -----
From: "Dana H. Myers" <dana.myers@xxxxxxxxx>
To: <pure-silver@xxxxxxxxxxxxx>
Sent: Thursday, April 06, 2006 10:32 AM
Subject: [pure-silver] Re: Deionized Water-Advantages &
Sources?
> Ben R. McRee wrote:
>> I've made a point of using distilled water for many of my
>> photographic
>> uses. But I'm hearing more references lately to
>> distilled AND deionized
>> water. What are the advantages? And where might I be
>> able to find it?
>>
>> I was just in the grocery store today (where I usually
>> buy distilled
>> water). I didn't find any bottle that claimed the water
>> was deionised.
>> I also noted that the store has replaced much (but not
>> all) of its
>> selection of distilled with reverse osmosis water! I'm
>> guessing that it
>> may get harder to find distilled water.
>
> I believe "reverse-osmosis" water *is* de-ionized water.
> Water is
> is usually de-ionized with reverse-osmosis.
>
> I prefer DI water to distilled water for mixing chems in
> general.
>
> I prefer distilled water, or DI water with minerals added
> for flavor,
> for situations where the water will be in long-term
> contact with metal
> and not have other chemicals added, since DI water is
> effectively corrosive
> (I've seen it first-hand).
>
> Cheers,
> Dana
>
Pure water is a pretty good solvent for many things.
Many years ago the high power tubes used in many broadcast
transmitters were water cooled. The anodes of these tubes
were on the outside and were in direct contact with the
cooling water. Because deionized water is non-conductive
that is what was used. The problem was the slow dissolving
of anything metallic in contact with the water and the
deposit of scale on the insides of the cooling system from
the various substances dissolved in the water. I don't
remember any more how this was dealt with since most
additions to the water make it conductive. Around the late
1930's RCA began to offer air cooled versions of many of
these tubes but the highest power ones remained water cooled
for a couple of decades.
---
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx
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