CORROSION RESISTANCE OF HASTEllOY®AllOYS - Haynes ...

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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 Phosphoric Acid, Pro· - 130 54 G S - B silicon tetrafluoride approx. 0.31·0.44 Ib./ 1000 cu. ft.; carbon dioxide duction gases and vapors approx. 0.47·0.68 Ib./1000 cu. ft.; P20 S equivalent 0.00033·0.00048 Ib./100 cu. ft. Possibly very small amount Hl04 as spray, moderate aeration Phosphoric Acid Slurry 20 170·200 77-93 U G - - in digester during production of wet process H J P0 4 • Plus CaS04, 40 percent H20, 2 percent H2S0 4 , 1 percent fluorine. Alloy C= 7.9 mpy Phosphoric Acid 0.1 122·248 50·120 E E E E Duration of test - 64 days (56 in H J P0 4 , 8 in H2SO4) and Sulfuric Aeration - air free Acid (0.4%) Agitation - extensive Type of test - field Process involved - syntheses of tertiary and secondary amyl phenols Remarks - unwashed Phosphoric Acid 0.1 122·347 50·175 E E E E Duration of test - 43 days (25 in H J P04, 18 in H2SO 4 ) and Sulfuric Aeration - air free Acid (0.3%) Agitation - extensive Type of test - field Process involved - syntheses of tertiary and secondary amylphenols Remarks - unwashed Phosphoric Acid, 14.5 158 70 - E - - plus 0.381 percent, HNO J in acid. Alloy C = 0.1 mpy Wet Process Phosphoric Acid, 28 180·230 82·110 U G - U 42 days, 20·22% H2S04, 1·1.5% f1uosilicic acid, aeration moderate. Wet Process Phosphoric Acid, 28 180·230 82·110 - G - U P20 S 20%, sulfuric acid 20·22%, f1uroride about 1-1.5%, probably as Wet Process f1uosilicic acid, moderate aeration Phosphoric Acid, 30t 185 85 - - G - 2 percent F, 4.5 percent H2S0 4 (110 hours exposure), liquid Wet Process Phosphoric Acid, 30t 250 121 - - G - 2 percent F, 4.5 percent H2S04 (110 hours exposure). hot wall Wet Process Phosphoric Acid, 30t 185 85 - - G - 2.4 percent F, 3 percent H2S04, 1.2 percent ferrous oxides. 1.1 percent Wet Process solids (96 hours exposure), liquid Phosphoric Acid, 30t 250 121 - - G - 2.4 percent F, 3 percent H2S0 4 , 1.2 percent ferrous oxides. 1.1 percent Wet Process solids (96 hours exposure). hot wall Phosphoric Acid, 36 104 40 - G E B P20 S equivalent 26%, sulfuric acid 2.9%, chloride 350 ppm, Wet Process hydrofluosilicic acid trace, aluminum phosphate trace, ferric phosphate trace, moderate aeration Phosphoric Acid, 36 172 78 - G E U P20 S equivalent 26%, sulfuric acid 2.9%, chloride 350 ppm, hydrofluoric Wet Process acid, trace water. Suspended matter: calcium sulfate dihydrate 30% of suspension weight, calcium phosphate 0.1%, moderate aeration Phosphoric Acid, 39 170-183 77-84 - - E - 2 percent H2S04, total fluorides 1.2 percent, gypsum 30 percent Wet Process Phosphoric Acid, 39 170-183 77-84 U G E U 96 days, liquid phase, 2% H2S0 4 , HF and H2SiF 6 trace, aeration moderate, Wet Process agitation strong Phosphoric Acid, 39 183 84 U G E U 28% P20 S ' sulfuric acid 2%, hydrofluosilicic and hydrofluoric about 1.2%. Wet Process Suspended gypsum 30% of suspension weight, aeration Phosphoric Acid, 53.8 121-149 49·65 - E - - in evaporation of H2P04 plus 1.62·1.70 F2, 1.5·2.5 H2S04, 2 percent Wet Process CaS04 in thickener. Alloy C= 1.7 mpy Phosphoric Acid, 55 180 82 - G G U H J P04 (40% P20 S ). containing combined fluorine, calcium sulfate, Wet Process hydrofluosilicic acid. Phosphoric Acid, 55 232 111 U U - U 40% P20 S equivalent, containing 3% sulfuric acid and suspended calcium Wet Process sulfate; slurry. Gases containing water and fluorine compounds are evolved at the exposure area. Phosphoric Acid, 56t 190·230 88-110 - - E - 2 percent H2S04, 1percent F, 1.5 percent ferrous and aluminum oxides, 4 Wet Process percent solids (48 hours exposure), liquid Phosphoric Acid, 56t 225-245 107·118 - - G - 2percent H2S04, 1percent F, 1.5 percent ferrous and aluminum oxides, 4 Wet Process percent solids (48 hours exposure), hot wall Phosphoric Acid, 56t 300 149 - - B - 2 percent H2S0 4, 1percent F, 1.5 percent ferrous and aluminum oxides, 4 Wet Process percent solids (48 hours exposure), hot wall Phosphoric Acid, 56t 330 166 - - U - small amounts of Co, MgO, Fe, AI20 J , Si02, Na20, CI. No fluorides or H2SO4 Wet Process 66t 325 163 - - B - present (48 hours exposure), hot wall 66t 340 171 - - U - Phosphoric Acid, 69 490 to 550 254 to 287 B B - - highly concentrated, aerated acid, 69% P20 S , static and agitated Wet Process 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) 36
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 Phosphoric Acid, 70-100 60-600 16-315 - B - - H3P04(72% P20 S ), sulfuric acid 3. 7% (3.0% S03); fluoride 0.5%, moderate Wet Process aeration Phosphoric Acid, 70 200 93 E E - E highly concentrated, unaerated acid, 70.3% P20 S ' static and agitated Wet Process Phosphoric Acid, 70 300 149 E E - S highly concentrated, unaerated acid, 70.3% P20 S , static and agitated Wet Process Phosphoric Acid, 93.5 398-410 203-210 - - B - (67.8 percent P20 S ), containing about 4.3 percent sulfuric acid and 4.4 Wet Process percent iron and aluminum Phosphoric Acid, 96.6 410 210 - E - G 70% as P20 S , 35% ortho, 35% non·ortho; sulfuric acid about 4%, Wet Process hydrofluoric acid about 0.3%, calcium about 0.2% Phosphoric Acid, 98 390·460 199·238 - S - - (71%P20 S ), sulfuric acid 4-6%, iron and aluminum 2.8-3.0% as trioxides, Wet Process fluorine compounds 0.5-1.0% (calculated as fluoride). extensive aeration Phosphoric Acid, 98 400 204 B B B - ammonium bisulfate 3.8%, hydrofluoric acid 0.4%, 23 days Wet Process Phosphoric Acid, 98 460 237 U S G - 71% P20 S , sulfuric acid 4·6%, iron and aluminum 2.8-3.0% as trioxides, Wet Process fluorine compounds 0.5-1.0% (calculated as fluoride). aeration Phosphoric Acid, - 300 149 G G G B nominal analysis: H3P04equivalent 101.0%; total P20 S 73.19% ortho P 2 0 S Wet Process 27.58%; total solids 1.17%; CaO 0.59%; S04 1.97%; F 0.40%; Fe203 2.05%; AI203 1.56%; MgO 0.75%, aeration Phosphoric Acid, - Wet Process 300-350 149-177 - G - S supeqihosphoric acid, 94.8% (as ortho acid). Total P20 S 68.54%; ortho P20 S 51.08%; Fe20) =2.30%; S04 =2.19%; AI203=1.92%; Fe =0.33%. Concentration gradually reduced to 80% H3P04 (54% P 2 0 S ), each day 1/40 of acid was replaced with 54% P20 S acid (80% H3P04equivalent) Phosphoric Acid, - 410 210 U U B U vapor above phosphoric acid 93.5% (67% P20 S ), containing about 4.3% Wet Process sulfuric acid and 4.4% iron and aluminum oxides. Fluoride is present below 1.5%, aeration Phosphorous Chlorides - -45 to -30 -43 to ·34 - E - E phosphorus trichloride; methyl dichlorphosphine, CHlCI 2; lower concentrations phosphorous oxychloride, POCI); methoxydichloro phos· phine, CH30PCI2; triethyl phosphate, (C2HsOh PO; chlorine. Anhydrous. Phosphorous, Elemental - 149·158 65-70 - E - - storage. Alloy C=0.2 mpy Phosphorous Pentoxide 13 285·300 141·149 G U - - contains approx. 250 ppm F2 Phosphorous Pentoxide - 1472 800 U - - - Phosphorous and - - - - G - - phosphorus pentoxide, iodine, chlorine and water Phosphoric Acid Phthalic Anhydride - 60 16 E E - S unspecified alcohol, phthalate ester, sulfuric acid
Page 1 and 2: OUR NEW NAME Haynes International,
Page 3 and 4: COMPARATIVE CHEMICAL COMPOSITIONS,
Page 5 and 6: 'A~0~A~~ Alloy / q,~ "'.>~~~Cfj 0.5
Page 7 and 8: Type 316 Concen- Temperature HASTEL
Page 9 and 10: Type 316 Concen- Temperature HASTEl
Page 35: 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 and 86: CORROSION RESISTANCE OF HAYNES® AL
Page 87 and 88:
TYPICAL PENETRATION RATES IN CORROS
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