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
Formaldehyde 10 220 104 - E - - plus traces of formic acid, calcium formate, and glycols, 87-day test in
10 243 117 - E - - bottom of fractionating tower. 87-day test at center of tower.
Formaldehyde 12-15 275 135 - G - - plus 2 percent formic acid, 2 percent various alcohols, aldehydes and
resins. Alloy C= 7 mpy
Formaldehyde 20 to B.P. to B.P. S S - -
50 to B.P. to B.P. S S - -
70 to B.P. to B.P. S S - -
100 to B.P. to B.P. S S - -
Formaldehyde 20 275 135 - E - - plus 10·15 percent volatiles (ethanol, acrolein, acetone) and 0.1 percent
formic acid, 7l-day test with agitation and no aeration.
Formaldehyde 40 122 50 - E - - plus 10 percent methanol and 0.01 percent formic acid, 28-day test with
moderate agitation and aeration. Alloy C = 0.04 mpy
Formic Acid 2 300 149 - E - - plus 0.5·1.5 percent formaldehyde, resins, higher glycols. Alloy C= 0.4
mpy
Formic Acid 10 214 101 G - - G immersed, 96 hrs.
Formic Acid 10 - - - G - -
Formic Acid 10 150 66 G E - -
20 150 66 G E - -
40 150 66 G E - -
60 150 66 G E - -
85 150 66 E E - -
Formic Acid 25 B.P. B.P. G G - - Alloy C = 8.1 mpy
Formic Acid 50 217 103 S - - B immersed, 96 hrs.
Formic Acid 84 230 110 - E - -
Formic Acid 88·90 217 103 E - - S immersed, 96 hrs.
Furfural 25 B.P. B.P. S* - - - *plus one percent acetic acid and one percent formic acid and atrace of
100 75 24 S - - - acetaldehyde and CO2
Furfural Residue - 100 38 B - - - plus 40 percent H20, 3-4 percent H2S04, traces acetic and formic acids.
Gallic Acid 10 B.P. B.P. - S - -
100 B.P. B.P. S S - -
Gas - 100 38 - E - E 0.1 to 8.3% S02; 0.006% S03; 80% saturated, possible entrained sodium
bisulfite solution; pH 4, extensive aeration
Gas, Exhaust - 100 38 - E - E exhaust air, saturated with water and containing chlorinated solvents and
other organic compounds, considerable aeration
Gas, Exhaust - 142 62 - E - E gas up to 1.5% S02; 0.006% S03; 2 mg/5CF H2S04 mist, 0 to 80%
saturated; spray water ·0.2 to 0.3% S02, 1.5 pH, extensive aeration
Gas, Exhaust - 235 113 - E - E vapor - wet S02; approx. 90% H20; 10% S02 by weight; pH of condensed
vapor = 1.5
Gaseous Stream - 170-187 77-86 - - E E principally N2• aeration, 23 ppm HlO4
Gaseous Stream - 284 140 - - - S containing 75·80% N2, 4.5-5.0% O2• 10-12% P20 5 , 3-15% H20 and asmall
amount of H3P04 mist, extensive aeration
Gaseous Stream - 302 150 - - E E containing 75·80% N2, 4.5-5.0% O2, 10·12% P20 5 , 3-15 %H20 and asmall
amount of H3P04 mist, aeration
Gasoline 100 325 163 E E - - straight run, crude, etc. in liquid and vapor phases. 630 A.P.I., 105 psig
Gasoline - 140-225 60·107 E - - - low end· point containing HCI
Gasoline - 200-375 93-191 E - - - high end·point containing HCI
Gelatin Solution 20-30 90·125 32·52 S - - - plus some NaCI, CaS04, CaCI2. HCI at pH = 1
Glutamic Acid - 75 24 E - - - saturated, plus NaCI at a pH of 12
Glutamic Acid, Crude - 75 24 - G - - some H202. Alloy C= 2.9 mpy
Glutamic Acid, Crude - 176-194 80·90 - E - - plus H202 pH = 1.8. Alloy C= 1.3 mpy
Glutaric Acid - 210 99 - G - U* 143 hrs., lab test, production of glutaric anhydride. *5 mpy in vapor, 61
mpy in liquid
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
24