Yellow Prussiate of Soda (YPS)
Yellow Prussiate of Soda (YPS)
(OP)
This was posted in Mechanical engineering other topics, but I think this will be a better place for it.
The problem that I have find a tank that will be able to store Yellow Prussiate of Soda (YPS), but I do not know what type of material will be able to handle it. The tank that held the YPS was steel and it rusted out. I was thinking of polyethylene, it seems to work for like concentrations (10ppm). However, the concentration of the YPS I am during with is around 80-100ppm.
I was hoping that maybe someone has some experience with YPS. Any suggestions would be appreciated.
Thank you in advance.
rnip
The problem that I have find a tank that will be able to store Yellow Prussiate of Soda (YPS), but I do not know what type of material will be able to handle it. The tank that held the YPS was steel and it rusted out. I was thinking of polyethylene, it seems to work for like concentrations (10ppm). However, the concentration of the YPS I am during with is around 80-100ppm.
I was hoping that maybe someone has some experience with YPS. Any suggestions would be appreciated.
Thank you in advance.
rnip





RE: Yellow Prussiate of Soda (YPS)
For suitable plastics look at:
ht
Looks like tantalum is the only suitable metallic substance http://www.astrocosmos.com/pdf/chart.pdf
RE: Yellow Prussiate of Soda (YPS)
rnip
RE: Yellow Prussiate of Soda (YPS)
Of course, if only one metal is tested -- by a tantalum vendor!
Aluminum is considerably less expensive. Also, for your dilute concentration, 316 will be excellent (rather that merely 'Good' as in listing below); it is used for Alodine & Iridite chromating solutions which contain a lot of nasty stuff besides Sodium Ferrocyanide!
Chemical Compatability Results for Sodium Ferrocyanide
Material Compatibility
304 stainless steel B-Good
316 stainless steel B-Good
ABS plastic N/A
Acetal (Delrinr) A-Excellent
Aluminum A-Excellent
Brass N/A
Bronze N/A
Buna N (Nitrile) A-Excellent
Carbon graphite A-Excellent
Carbon Steel N/A
Carpenter 20 N/A
Cast iron N/A
Ceramic Al203 A-Excellent
Ceramic magnet N/A
ChemRaz (FFKM) A-Excellent
Copper D-Severe Effect
CPVC A-Excellent
EPDM A-Excellent
Epoxy A-Excellent
Fluorocarbon (FKM) A-Excellent
Hastelloy-Cr A-Excellent
Hypalonr B-Good
Hytrelr N/A
Kalrez A-Excellent
Kel-Fr N/A
LDPE A-Excellent
Natural rubber B-Good
Neoprene A-Excellent
NORYLr A-Excellent
Nylon N/A
Polycarbonate N/A
Polyetherether Ketone (PEEK) A-Excellent
Polypropylene A-Excellent
Polyurethane B-Good
PPS (Rytonr) N/A
PTFE (Teflonr) A-Excellent
PVC A-Excellent
PVDF (Kynarr) A-Excellent
Silicone N/A
Titanium N/A
Tygonr A-Excellent
Vitonr A-Excellent
Ratings -- Chemical Effect
A = Excellent.
B = Good -- Minor Effect, slight corrosion
or discoloration.
C = Fair -- Moderate Effect, not recommended
for continuous use. Softening, loss of strength,
swelling may occur.
D = Severe Effect, not recommended for ANY use.
N/A = Information Not Available.
For chemical compatabilities, I like Cole-Parmer's site:
http://www.coleparmer.com/techinfo/chemcomp.asp
Just scroll to select the chemical & click submit.
Ken
RE: Yellow Prussiate of Soda (YPS)
RE: Yellow Prussiate of Soda (YPS)
Perhaps you can go to the expense of testing, and then report your results.
One chemical consideration is that C20 (presume you mean UNS N08020) contains 3-4% Cu for which ferrocyanide ion may act as a chelating agent, thereby selectively leaching from the alloy.
RE: Yellow Prussiate of Soda (YPS)
I would guess that Ken is right about the chelating effects of this chemical. If I needed an alloy solution I would look for high Cr content.
A non-metalic solution looks best for this application. Just make sure that the polymer is stable in this environment. If you start leaching it may fail faster than the wrong alloy.
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Rust never sleeps
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