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Chemical Cleaning


#1

Greetings all. When the old Brendel’s store chain went under, I bough
some equipment from them. The piece I have a question about is a
cleaning tank made by Electro Clean Inc. I was told it was used to
clean the tarnish off of hollowware. Does anyone know anything about
this system or have any relevant about it. It is a large
tub of about 30 gallons capacity, heater, and a rectifier with clips
to attach to the piece to be cleaned. I would very much like to find
a manual for it.

Thanks.
Bill


#2
   The piece I have a question about is a cleaning tank made by
Electro Clean Inc. I was told it was used to clean the tarnish off
of hollowware. Does anyone know anything about this system or have
any relevant about it. 

G’day; I haven’t used the apparatus, but the basic idea strikes me
as reducng a tarnish film by means of freshly generated hydrogen
gas. If the work is placed in an electrolyte such as sodium
sulphate or bisulphate and attached to the negative lead of a DC
power supply, and the positive lead attached to a piece of stainless
steel, tiny bubbles of very reactive hydrogen gas will be generated
over the surface of the work, and will combine with silver sulphide
tarnish, removing the sulphur and leaving silver.

Very much the same sort of thing happens as when a tarnished piece
is placed in a bowl of hot sodium carbonate (washing soda) together
with a piece of aluminium foil.

Cheers for now,
John Burgess; @John_Burgess2 of Mapua, Nelson NZ


#3
The piece I have a question about is a cleaning tank made by
Electro Clean Inc. 

Bill , the only Electro Clean I know about, is a clear solution that
I use with a rectifier (plating machine) to clean jewelry that is to
be plated,… rhodium, yellow gold, etc. I have never heard it used
to remove polishing compound, etc. And could possibly harm pearls
and sensitive soft gems_ depending on how much current is used.Bottle
I have is Midas from Rio and states: CORROSIVE! CONTAINS SODIUM
HYDROXIDE (caustic soda) My 2 cents.

Thomas Blair


#4

Good morning John.

Thank you for the input. The tank does indeed have several stainless
steel sheets connected as a “screen” around the inside of the tank
and a lead to connect to the piece being worked on. There are also
two heating coils at the bottom. The electrolyte to be used was what
has had me baffled as there were no instructions with it. I was told
that it used a caustic solution. I had always felt that it worked
like the Aluminum foil and Sodium Carbonate trick or the little
Ionic Cleaners.

One post spoke of a system using sodium cyanide. I need to be
certain that this is not how this machine was used before I do
anything else with it.

For as much as I have learned over the years, my reservoir of
ignorance continues to appall me. Thank you and Orchid for helping
to drain that reservoir.

Bill


#5

Provided you have good ventilation you can use caustic soda to clean
jewelry by boiling the pieces in a tall steel pot. You only need a
couple inches of water. Be careful not to splash or boil over or
boil down to nothing…don’t walk way from the stove.

I have found this to be the best means of cleaning nasty dirt that
will not come out from behind diamonds and for cleaning off shelac.
I only do this as a last resort because of fumes and the need to boil
though.

Do not boil pearls, tourquoise, coral, emeralds, opals, etc.

Mark


#6

Hi Bill:

I am a silver plater and familiar with the equipment you have.

The piece of equipment that you have was made for electro-cleaning
silver or ferrous or non ferrous metals.

It is like a large ultrasonic tank.

There is a rectifier with a positive and negative leads, a steel
tank or steel plates, and heater to heat the solution.

One of the lead is connected to the tank or steel plates preferably
stainless, the other to the piece being cleaned.

The chemical used is a caustic solution. I use an environmentally
friendly cleaner.

Give me a call and I’ll tell you how to connect the unit and where
to buy the cleaner.

raymond
www.triosilversmiths.com


#7

Once again Orchid members provide the answers. I would like to thank
Ray Cutuli from TrioSilversmiths, www.triosilversmiths.com for
solving my cleaning machine problem. It turned out that he had built
his own cleaner that worked just like the one I had bought. He also
put me on to a source for the chemicals. Thank you Ray. Bill