CORROSION RESISTANCE OF HASTEllOY®AllOYS - Haynes ...

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HYDROCHLORIC - 11.8% HCI + 13.3% HN0 3 (by weight) 30% yol. 15% yol. NITRIC ACID MIXTURES 15.2% HCI + 17.2% HN0 3 (by weight) 40% Yol. 20% Yol. HAYNES alloy No. 25 160 deg. F (71 deg. C) 190 deg. F (88 deg. C) 2.0 (0.05) 11 (0.28) 15 (0.38) 33 (0.84) NITRIC ACID 10% 20% 30% 40% 50% 60% 65% 7fYJ/o HAYNES alloy No. 25 Room Nil Nil Nil Nil Nil Nil Nil 150 deg. F 0.3 0.5 0.8 2.0 2.0 Nil Nil (66 deg. C) «0.01) «0.02) (0.02) (0.05) (0.05) Boiling 0.5 2.0 4.0 9.0 18* 34* 41* 46* «0.02) (0.05) (0.10) (0.23) (0.46) (0.86) (1.04) (1.17) MULTIMET alloy Room Nil Nil Nil Nil Nil Nil Nil 150 deg. F Nil Nil Nil 0.1 0.3 0.4 0.8 (66 deg. C) «0.01) «0.01) (0.01) (0.02) Boiling 0.3 0.8 2.0 4.0 6.0 10 12 14 «0.01) (0.02) (0.05) (0.10) (0.15) (0.25) (0.30) (0.36) fl};; "The rates for the fifth (24-hour) test period, not steady state rates. 86
TYPICAL PENETRATION RATES IN CORROSIVE MEDIA, Mils (mm) Per Year ) PHOSPHORIC HYDR<strong>OF</strong>LUORIC SODIUM ACID ACID HYDROXIDE 10% 30% 50% 85% 5% 25% 45% 5% 25% 50% HAYNES® alloy No. 25 Room Nil Nil Nil Nil 150 deg. F 0.1 0.1 Nil 0.1 (66 deg. C) « 0.01) « 0.01) « 0.01) 5.0 12 20 (0.13) (0.30) (0.51 ) - - - Nil Nil Nil Nil Nil Nil Boiling 0.2 2.0 4.0 562 «0.01) (0.05) (0.10) (14.3) - - - Nil - - ') MULTIMET® alloy Room Nil Nil Nil Nil 5.0 37 52 (0.13) (0.94) (1.32) Nil Nil Nil 150 deg. F Nil 0.1 0.1 0.1 - - - Nil Nil Nil (66 deg. C) « 0.01) « 0.01) «0.003) Boiling 0.1 0.3 3.0 303 « 0.01) «0.01) (0.08) (7.70) - - - Nil - - ) SULFURIC ACID 2% 5% 10% 25% 50% 60% 77% 80% 85% 90% 96% HAYNES alloy No. 25 Room Nil Nil Nil Nil Nil Nil Nil Nil Nil Nil Nil 150 deg. F 11 Nil Nil 30 29 55 61 91 123 104 Nil (66 deg. C) (0.28) (0.76) (0.74) (1.40) (1.55) (2.31 ) (3.12) (2.64) Boiling 49 52 92 203 >1000 >1000 >1000 >1000 >1000 735 318 (1.24) (1.32) (2.34) (5.16) (>25.4) (>25.4) (>25.4) (>25.4) (>25.4) (18.7) (8.08) ) <strong>CORROSION</strong> TEST SAMPLES Standard spool-type specimens are available for testing under actual plant conditions. Samples of wrought HASTELLOY§ alloys B-2, C-276, C-22, G-3, G-30, X, HAYNES® alloy No. 25 and MULTIMET® alloy are available from stock in the annealed condition. ) As-welded specimens can be obtained from stock in all these alloys except MULTIMET® alloy. Corrosion test racks containing up to 20 samples of Cabot Wrought Products Division alloys and other metals are available for installation in any plant where corrosion is'a concern. To obtain corrosion coupons or test racks, contact your local Cabot Wrought Products Division sales representative or any of the locations shown on the back cover of this booklet. 87
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OUR NEW NAME Haynes International,
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COMPARATIVE CHEMICAL COMPOSITIONS,
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'A~0~A~~ Alloy / q,~ "'.>~~~Cfj 0.5
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Type 316 Concen- Temperature HASTEL
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Type 316 Concen- Temperature HASTEl
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Page 35 and 36: Type 316 Concen- Temperature HASTEl
Page 37 and 38: Type 316 Concen- Temperature HASTEL
Page 43 and 44: Type 316 Coneen- Temperature HASTEl
Page 61 and 62: ( Type 316 Concen- Temperature HAST
Page 63 and 64: ISOCORROSION DIAGRAMS· HASTELLOY®
Page 65 and 66: ISOCORROSION DIAGRAMS* HASTELLOY®
Page 69 and 70: ISOCORROSION DIAGRAMS· r HASTELLOY
Page 71 and 72: PHOSPHORIC ACID ISOCORROSION DIAGRA
Page 75 and 76: ISOCORROSION DIAGRAMS· HASTELLOY®
Page 79 and 80: ACETIC AND FORMIC ACIDS Acetic and
Page 81 and 82: EFFECT OF TEMPERATURE ON PITTING RE
Page 83 and 84: CREVICE-CORROSION DATA IN 10% FERRI
Page 85: CORROSION RESISTANCE OF HAYNES® AL
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