CORROSION RESISTANCE OF HASTEllOY®AllOYS - Haynes ...

Type
316
Concen- Temperature HASTELLOY~ alloy Staintration,
less
Corrosive Media percent deg. F deg. C 8/8-2 C/C-276 G/G-3 Steel Conditions
Potassium Bisulfite - 130 54 - E - E about 50% water; pH 6.5 to 4.5, moderate aeration
Potassium Bisulfite - 145 63 S E - E about 50% water; pH 6.5 to 4.5, aeration
Potassium Bromide 75 180 82 - E - - plus potassium bromate, KOH, Br2' trace of iron. Alloy C= 1.1 mpy
Potassium Carbonate All to B.P. to B.P. S S - -
100 1500 816 S - - -
Potassium Chloride 10 to B.P. to B.P. S S - -
20 125 to B.P. 52 to B.P. S - - -
28 150 66 E* E - - *during manufature of electrolytic potassium hydroxide
28 175 79 ~ - - -
28 B.P. B.P. B - - -
Potassium Chloride 10 220 104 - E - E concentrated brine in KCI, 20% CaCI2(extraction pilot plant; some iron
chloride present as contaminant)
Potassium Chloride 10 230 110 - E E E plus 20% calcium chloride (some iron chloride present as contaminant),
slight aeration
Potassium Chloride 99 325 163 E E E E* sodium chloride 1%, acetic acid
Ouration of test - 93 days
Aeration - extensive
Agitation - extensive
Type of test - field
Process involved - anti-caking treatment of fine granular KCI
*stress-corrosion cracked
Potassium Chloride 99 325 163 - E - E sodium chloride 1%, solid, acetic acid vapor, water vapor, amine acetatewater
emulsion was added to salt mixture, extehsive aeration
Potassium Chloride - 85-105 29-41 - E - E saturated KCI-NaCI brine with small amounts of MgCI2and H20. Possible
traces of copper.
Potassium Chloride - 95 35 - E E E saturated KCI-NaCI brine
Potassium Chloride - 195-198 91·92 - E - S saturated KCI·NaCI brine with small amounts of MgCI2and H20. Possible
traces of copper.
Potassium Chloride - 196 91 - E G S saturated KCI-NaCI brine with small amounts of MgCI2and H20. Possible
traces of copper.
Potassium Chloride Brine - 140 60 - E - - KCI = 325 grams/liter, KOH = 2 grams/liter, K2C0 3 = 0.2 grams/liter.
Alloy C= 0.002 mpy
Potassium Chloride - Saturated 85-105 29·41 - E E E small quantity of MgCI2and H2S. 113 days, agitation .1 to .3 fps
Sodium Chloride Brine
Potassium Chloride - Saturated 196 91 - E G S small amounts MgCI2and H2S. 42 days, agitation .1 to .3 fps
Sodium Chloride Brine
Potassium Chloride - Saturated 200 93 - - E E impurities MgS04, CaS04, MgCI2, 36 days
Sodium Chloride Brine
Potassium Chromate 10 75 24 E E - -
Potassium Cyanide 10 75 24 S - - -
Potassium Dichromate 10 100 38 - S - -
15 100 38 - S - -
25 100 38 - S - -
Potassium Ferrocyanide 5 75 24 S - - -
Potassium Ferricyanide 10 75 24 S - - -
30 75 24 S - - -
Potassium Hypochlorite 50 200 93 E E - - plus 50 percent NaOH. Alloy C= 0.03 mpy
Potassium Hypochlorite All to B.P. to B.P. - S - -
Potassium Hydroxide 10 to B.P. to B.P. S S - -
20 to B.P. to B.P. S S - -
30 to B.P. to B.P. S S - -
40 to B.P. to B.P. S S - -
50 to B.P. to B.P. S S - -
60 B.P. B.P. S - - -
90 to 125 to 52 S - - -
Potassium Hydroxide 20 203 95 - E - - in isopropanol and isopropanol solution of hexachlorpentadiene. Alloy C=
0.09 mpy
E - Less than 2 mpy (0.05 mm/y)
G- 2 mpy (0.05 mm/y) to 10 mpy (0.25 mm/y)
S - Over 10 mpy (0.25 mm/y) to 20 mpy (0.51 mm/y)
B - Over 20 mpy (0.51 mm/y) to 50 mpy (1.27 mm/y)
U - More than 50 mpy (1.27 mm/y)
B.P_ -
Boiling Point
38