CORROSION RESISTANCE OF HASTEllOY®AllOYS - Haynes ...

Type
316
Concen- Temperature HASTElLoye alloy Staintration,
less
Corrosive Media percent deg. F deg. C 8/8-2 C/C-276 G/G-3 Steel Conditions
Calcium Chloride 12 75-85 24-29 G - - - plus 8 percent methyl ethyl ketone, 1 percent HCI, 0.5 percent aconitic
acid
Calcium Chloride 20 220 104 - E E E 10% KCI; concentrated brine in potash extraction pilot plant.
C~lcium Chloride 29 167-194 75-90 E E - - plus 8.7 percent MgCI2, 1 percent NaCI half in vapor - half liquid phase.
Bittern Process. Alloy C=0.08 mpy
Calcium Chloride All to B.P. to B.P. S E - - *slight gain in weight. Specimens in pilot plant evaporator
40-60 350 177 E* E* - -
Calcium Chloride 40 180 82 - E - E zinc sulfate 40%, pH 2.8, 35% of time; aluminum sulfate 3-30%, pH 3,
15% of time; magnesium sulfate 40%, pH 3. 10% of time; zinc chloride
40%, pH 1.8, 5% of time, moderate aeration
I III
Calcium Chloride 40 70-200 21-93 - E - E 5 solutions, each singly: calcium chloride, pH 2, 35% of time; zinc sulfate
40%, pH 1.8. 35% of time; aluminum sulfate, 3·30%, pH 3, 15% of time;
magnesium sulfate 40%, pH 3, 10% of time; zinc chloride 40%, pH 1.8,5%
of time. Moderate aeration.
Calcium Chloride 54 260 127 G G - - hydrogen chloride recovery, pH about 3 to 4
Duration of test - 305 hrs. =12.71 days
Aeration - moderate
Agitation - 2-3 ft./sec.
Calcium Chloride 55 220 104 G - - - partially purified
Calcium Chloride 58 329 -165 - G - - plus 1.0·1.3 percent NaCI, 0.10 percent Ca(OHh. Alloy C=2.1 mpy
Calcium Chloride 62 310 154 G G - -
Calcium Chloride 73 350 177 G - - - partially purified
Calcium Chloride - 175 79 E - - - 140 g/I CaCI2, 80 g/I NaCI, 2 g/I Ca(OHh
calcium Chloride - 248-266 120-138 G - - - plus Na2S, Na2COJ, elemental sulfur, in sulfur separator_
Calcium Chloride Brine - 176·194 80-90 - E - - plus MgCI2 brine, pH =5.0
Calcium Hydroxide 18-20 70 21 - E - S* duration of test - 204 days, *severe pitting
75 24
Calcium Hydroxide to 50 to B.P. to B.P. - E - -
Calcium Hydroxide - 75 24 - E - G* duration of test - 42 days, *perforated
Calcium Hypochlorite 0·5 86·140 30-60 - E - -
Calcium Hypochlorite 0.5 86·140 30-60 - U - - chlorine absorption
Calcium Hypochlorite 2-3 86 30 - S - - Alloy C=13.5 for 2 percent, 16.4 for 3 percent
Calcium Hypochlorite 6 95·212 35·100 - E - - Alloy C=0.2 mpy
Calcium Hypochlorite 10 75 24 - S - -
15 125 52 - S - -
20 75 24 - E - -
20 125 52 - S - -
Calcium Hypochlorite - 65·86 18-30 - E - - spray drying (180 grams/liter CaOCI2). Alloy C=0.07 mpy
Bleach
Calcium Hypochlorite - 80 27 - E - - 2-3 grams/liter available C12. Alloy C=0.1 mpy
Bleach Liquor
Calcium Hypochlorite - 72-80 22·27 - E - - 220-230 grams/liter. Alloy C=0.01 mpy
Liquor
Calcium Hypochlorite - 60-100 16-38 - E - - free CI2=40 grams/liter, CaCI 2, CaCIOJ, CaCOJ and free lime in small
(Lime Sludge)
amounts
Calcium·Magnesium Cone. 212-220 100-104 S G - - plus free 0.63 percent HCI in condensate. Alloy C=6.7 mpy
Chloride SOlutions
Calcium Pyridine - 100-150 38·66 - E - - plus 1-5 percent H2S0 4 and a trace of HgS0 4 • Alloy C=0.1 mpy
Sulfonate
Calcium Sulfite - 115 46 - E E E calcium sulfate, calcium carbonate, fly ash, all suspended as 30-50% (by
wt.) slurry, pH not specified
Calcium Sulfite - 117 47 - E E E calcium sulfate, calcium carbonate, fly ash, all suspended as 10-15% (by
wt.) slurry, pH not specified, aeration
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
14