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
Chlorine - 0 -18 - E - E duration of test - 139 days, dry chlorine gas
Chlorine - Ambient Ambient - G - - chlorine "sniff" scrubber, 400 hrs.
Chlorine - 68 20 - E - - plus HCI and organic acid
Chlorine - 76-86 24·30 B* S* - B* feed CI 2 to dichloropropene at 5 psig, 672 hrs. *vapor phase in liquid,
Alloy B=30 mpy, Alloy C-276 =13 mpy, Type 316 Stainless Stel!l =32
mpy
Chlorine - 77-90 25-32 - E - E dry chlorine gas
Chlorine - 86 30 G G - - chlorination system in alkyl benzene unit samples in chloronator circulating
loop, 3936 hrs.
Chlorine - 120-135 49-57 - E - - above sodium cell in fumes containing sodium oxychloride, sodium
chloride, sodium oxide smoke and moist air. Alloy C=0.1 mpy, 0.001 in
max. pitting
Chlorine - 140 60 - E - - w/entrained 89.1 % sulfuric acid and organic impurities
Chlorine - 302 150 - E - - 1000 ppm CI 2 in vapor phase during dechlorination. Alloy C=0.3 mpy.
1776-hr. test
Chlorine (Wet) 100 75 24 - G - -
Chlorine (Wet) - 60·200 16-93 - G - -
Chlorine (Wet) - 86 30 - E - - Alloy C=1.1 mpy, 67.8 hr. test
Chlorine (Wet) - 104 40 - G - - with some sea-water spray
Chlorine (Wet) - 122 50 - E - - plus hydrochloric and hydrochlorous acid, chlorination of polyethylene,
72 hrs.
Chlorine (Wet) - 170 77 - E - - organic solids, condensed water, slight attack under spacer. Duration of
test - 67 days
Chlorine (Wet) - 185 85 - S - - in vapor space of sulfur separator. Plus H 2 0, S, and organic thio and
chloride
Chlorine (Wet) - 190 88 - G - - Alloy C=4.5 mpy, 72 hrs.
Chlorine (Wet) - 190 88 - G - - condensed water and organic solids, duration of test - 203 days, perforated
Chlorine (Wet) - 190 88 - U - - duration of test - 28 days, perforated, salt brine spray
Chlorine (Wet) - 190 88 - G - - duration of test - 74 days, severe pitting, salt brine spray
Chlorine (Wet) - 190 88 - G - - duration of test - 18 days, moderate attack under spacer
Chlorine (Wet) - 190 88 - G - - duration of test - 202 days, perforated
Chlorine (Wet) - 190 88 - S - - condensed water and organic solids/spacer, duration of test - 18 days,
moderate attack under spacer
Chlorine (Wet) - 205 96 - U - - duration of test - 40 days, moderate pitting, salt brine spray
Chlorine (Wet) - 205 96 - B - - duration of test - 203 days, salt brine spray
Chlorine (Wet) - 225 107 - E - - in steam, HCI I cell liquor, tetrachloroethane bleach
Chlorine Saturated - 200 93 - G - - in vertical section overflow pipe. Alloy C=2 mpy
River Water
Chlorine Saturated - 205 96 - E - -
Water
Chlorine Dioxide 0.01 50 10 - E - - residual amounts in bleached pulp. pH =8-9. Alloy C=0.1 mpy
Chlorine Dioxide 5 210 99 - S - - in steam
Chlorine Dioxide 8-10* 150 66 - B - - condensed chlorine dioxide solution, flow rate of 250 c.f.m., 350-hr. test
*by volume.
Chlorine Dioxide 15 110 43 - E - - HOCI, CI 2 and water
Chlorine Dioxide - 35-40 2-4 - G - - in water saturated with CI0 2 (7 grams/liter). Alloy C=3.7 mpy
Chlorine Dioxide - 36 2 - S - - 4-5 g/I, pH 2-3.5, 351-hr. test
Chlorine Dioxide - 38 3 - E - - at top of absorber. Alloy C=0.1 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)
16