CORROSION RESISTANCE OF HASTEllOY®AllOYS - Haynes ...

Type
316
Concen- Temperature HASTELLOY3 alloy Staintration,
less
Corrosive Media percent deg. F deg. C 8/8-2 C/C-276 G/G-3 Steel Conditions
Sulfur Dioxide - 145 63 - E G B burning coal with 3% S plus 940 ppm CI, 19 days, field test, moderate
aeration, violent agitation
Sulfur Dioxide - 160 71 - - E E and MgO (scrubbing products of combustion from MgO recovery system),
aeration
Sulfur Dioxide - 176 80 U* G - B *specimen corroded away or was lost, extensive aeration, 5% S02' 6.5%
O2 and 88.5% N2 (dry basis) saturated with water vapor.
Sulfur Dioxide - 176 80 U* B S B *specimen corroded away or was lost, extensive aeration, 5% S02, 6.5%
O2 and 88.5% N2 (dry basis) saturated with water vapor.
Sulfur Dioxide - 230 110 G E - - in hydrocarbon alkylate plus sulfuric acid. Alloy C = 0.01 mpy
,~.
Sulfur Dioxide - 300·350 148·177 G G - - elemental sulfur mist 02, H20 and traces of sulfuric acid. In precipitator
for recovery of sulfur from pyrite gas. Alloy C = 5.0 mpy
Sulfur Dioxide, Moist - 180 82 - E - - occasional splashing of Na2S0. and H2S04. Alloy C = 0.15 mpy
Sulfur Oxides (Di & Tri) - 350 177 - E - E S02 16.2%, SO) 1.8%, H20 2.0%, O2 1.4%, moderate aeration
Sulfur Substituted - 257 125 G G B U HCI (pH·2), unreacted chlorine amyl·phenol, sulfur monochloride and
Amylphenol
sulfur dioxide in trace quantities, extensive aeration
Sulfur Trioxide - 100 38 B E - - plus S02, N2, CO2at top of Jennson towers in exhaust gas. Alloy C= 0.1
mpy
Sulfuric Acid 0·3 200 93 S E - - plus 0·5 percent Na2S04, 0·0.5 percent ZnS04, 0·0.2 percent CS), trace of
H2S. Alloy C = 1.0 mpy
Sulfuric Acid 0-4 140 60 - E - G hot sulfuric acid solution (pH 3.0) containing tungsten and molybdenum
salts with 2·3 gil fluorides, moderate aeration
Sulfuric Acid 0.1 164·177 73·81 U E - - plus 0.04 percent S02 and varying amounts of carbon on bottom tray of
S02 scrubber in regeneration of alkylation acid. Alloy C= 0.8 mpy
Sulfuric Acid 0.19 140 60 - - E E hydrochloric acid 0.057%, pH 2 to 5, 2360 hrs., incineration of municipal
waste
Sulfuric Acid 0.26 Room Room - E - - spent pickle solutions. Cold wash water with salts picked up in steel pick·
ling (0.097 percent ferrous, 0.003 percent ferric). Alloy C = 0.05 mpy
Sulfuric Acid 0.4-8.0 170·220 77-104 - E - - plus copper sulfate to saturation. Alloy C = 0.6 mpy
Sulfuric Acid 1·5 220 104 - E - - plus vegetable, fats, greases. Alloy C= nil mpy
Sulfuric Acid 1 to 23 302 150 - B U - as scrubbing liquid, moderate aeration
Sulfuric Acid 2 118·126 48·52 E - - - max. pitting = 14 mpy. Saturated with NaCI
Sulfuric Acid 2.5 200·250 93·121 - G - - plus 0.1 percent copper sulfate and some alcohols. Alloy C= 8.2 mpy
Sulfuric Acid 2.8·9.3 83 28 S E - E aluminum sulfate 0.8·5.3%, potassium chromium sulfate 0·0.3%, water,
moderate aeration
Sulfuric Acid 5 70·85 21·29 E E - - plus 20 oz. Na2Cr20/ per 18 gal. Alloy C= 0.07 mpy
Sulfuric Acid 5 90 32 S - - - plus FeS04 and 0.05 percent Ti02(0.008 percent solids)
Sulfuric Acid 5 90 32 - E - E 3-4% zirconyl sulfate, 15 days
Sulfuric Acid 5 122 50 G E - - plus sulfate oils, traces of NaCI and Na2S04. Alloy C = 0.3 mpy
Sulfuric Acid 5 137·153 58·67 - E E S aeration, lab test 29.5 days
Sulfuric Acid 5 175·185 80·85 U E - - plus 0.50 to 0.56 oz.lgal. of copper. Alloy C = 1.9 mpy
Sulfuric Acid 5 180 82 S E - - plus ore containing MnO and Mn02
Sulfuric Acid 5·15 113·131 45·55 - E - - plus 15·25 percent Na2S04, 1·5 percent organic salts. Alloy C= 0.16 mpy
Sulfuric Acid 5 to 150 gil 160 71 - E - E copper·10 to 60 g/l·ave. 40, silver 0 to 12 g/l·ave. 3.5. Solids consist of
precious metals, silica, lead sulfate, and a few % or less of selenium,
tellurium, arsenic, antimony and bismuth.
Sulfuric Acid 6·9 155·175 68·79 - B - - plus 0.35 oz/gal. NaNO). Alloy C = 34 mpy
Sulfuric Acid 7·8 155·165 68·74 - G - - plus 0.8·0.9 oz.lgal. NaNO) in pickling tank. Alloy C = 2.1 mpy
Sulfuric Acid 7.5·8 200·210 93·99 - E - - plus 3 percent aluminum sulfate, 1 percent ferric sulfate plus traces of
calcium and magnesium sulfates. Alloy C = 1.6 mpy
Sulfuric Acid 8 120·140 49·60 G G - - steel pickling tank. Alloy C= 4.7 mpy
-
E -
G -
S -
B -
U -
Less than 2 mpy (0.05 mm/y)
2 mpy (0.05 mm/y) to 10 mpy (0.25 mm/y)
Over 10 mpy (0.25 mm/y) to 20 mpy (0.51 mm/y)
Over 20 mpy (0.51 mm/y) to 50 mpy (1.27 mm/y)
More than 50 mpy (1.27 mm/y)
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