Roymech

Corrosion Resistance of Stainless Steel


Corrosion Resistance of St.Stls (304,321,347,316 ), Nickel, Monel, Iconel, Hastalloy C

The table below indicates the approximate corrosion resistance of selected corrosion resistant metals to a range of common chemicals.    This is collated information from various sources but is of limited quality.  For good quality information please consult reputable reference texts and/or the links provided below the table

Key to Letters designating corrosion resistance

  • A...Excellent Good Resistance less than 0,01mm per month (0,1 mm per year)
  • B...Good Resistance < 0,01mm to 0,1mm per month (0,1mm to 1mm per year)
  • C...Fair Resistance 0,1mm to 0,25mm per month ( 1mm to 3mm per year)
  • D...Some Resistance 0,25mm to 0,9mm per month (3mm -11 mm per year)
  • E...No Resistance > 0,9 mm per month (11 mm per year)
Chemical /condition Temp
oC
304, 321,347
Stain. Stl.
316,316L
Stain. Stl.
Nickel Monel Iconel Hastalloy C
Acetic Acid (20%) 21 A A A A A A
Acetic Acid (50%) 21 A A B A A A
Acetic Acid (50%) Boiling C B B A B A
Acetic Acid (80%) 21 A A B A A A
Acetic Acid (80%) Boiling D B B A B A
Acetic Acid (100%) 21 A A A A A A
Acetic Acid (100%) Boiling C B C B B A
Acetic Acid (100% - 150 lb pressure) 204 E C - - - A
Acetic Anhydride Boiling A A A A A A
Acetic Anhydride 21 A A A A A A
Acetic Vapours (100%) Hot E C C B B  
Acetic Vapours (30%) Hot C B - - -  
Acetone Boiling A A A A A A
Acetone 21 A A A A A  
Alcohol Ethyl 21 A A A A A A
Alcohol Ethyl Boiling A A A A A A
Alcohol Methyl 21 A A A A A A
Alcohol Methyl 66 C B A A A A
Aluminium Acetate - saturated   A A - - -  
Aluminium Chloride 21 D C B B C A
Alum (Chrome) 5% 21 A A C C A  
Aluminium Fluoride 21 D C A A B B
Aluminium Hydroxide - saturated   A A A A A B
Aluminium Molten E E E E E  
Aluminium Potassium Sulphate (2% alum) 21 A A A A A C
Aluminium Potassium Sulphate (10%) 21 A A A A A C
Aluminium Potassium Sulphate (10%) Boiling B A B A B C
Aluminium Potassium Sulphate (saturated) Boiling C B C B B C
Aluminium Sulphate (10%) 21 A A A A A B
Aluminium Sulphate (10%) Boiling B A B A B B
Aluminium Sulphate (saturated) 21 A A A A A B
Aluminium Sulphate (saturated) Boiling B A B A B B
Ammonia - all concentrations 21 A A - - A A
Ammonia - gas Hot D - - - - A
Ammonia Liquor 21 A A C C A A
Ammonia Liquor Boiling A A C C A A
Ammonium Bicarbonate 21 A A A A A  
Ammonium Bicarbonate Hot A A A A A  
Ammonium Carbonate (1% & 5%) 21 A A A A A B
Ammonium Chloride (1%) 21 A A A A A D
Ammonium Chloride (10% solution) Boiling A A A A B D
Ammonium Chloride (28% solution) Boiling B A A A B D
Ammonium Chloride (50% solution) Boiling B A A A B D
Ammonium Nitrate (All con. agitated) 21 A A C C A B
Ammonium Nitrate (All con. aerated) 21 A A C C A B
Ammonium Nitrate (saturated) Boiling A A E E B B
Ammonium Oxalate (5%) 21 A A A A A A
Ammonium Persulphate (5%) 21 A A E E A B
Ammonium Phosphate (5%) 21 A A A A A B
Ammonium Sulphate (1% & 5% agitated) 21 A A A A A B
Ammonium Sulphate (1% & 5% aerated) 21 A A A A A B
Ammonium Sulphate (10%) Boiling B A B A B B
Ammonium Sulphate (saturated) Boiling B A B A B B
Ammonium Sulphite Cold A A C B B  
Ammonium Sulphite Boiling A A E C C  
Aniline (3%) 21 A A A A A B
Aniline (conc. Crude) 21 A A A A A B
Aniline Hydrochloride 21 E D B B C D
Antimony Trichloride 21 E D A A A  
Barium Carbonate 21 A A A A A B
Barium Chloride (5%) 21 A A A A A B
Barium Chloride (saturated) 21 A A A A A  
Barium Chloride (aqueous solution) Hot B A A A B  
Barium Nitrate (aqueous solution) Hot A A C C B  
Barium Sulphate Barytes (blanc * * *ixe) 21 A A A A A A
Benzene 21 A A A A A B
Benzoic Acid 21 A A A A A B
Boracic Acid (5%) Hot/Cold A A A A A  
Borax (5%) Hot A A A A A B
Bromide (dry) 21 - - A A A  
Bromine Water 21 E D D D D A
Butyric Acid (5%) 21 A A A A A A
Butyric Acid (5%) 66 A A A A A A
Butyric Acid (aqueous solution - sp. g. 0.964) Boiling A A - - A A
Calcium Carbonate 21 A A A A A B
Calcium Chlorate (dilute solution) 21 A A A A A  
Calcium Chlorate (dilute solution) Hot A A A A B  
Calcium Chloride (dilute solution) 21 B A A A A A
Calcium Chloride (concentrated solutions) 21 B A A A A A
Calcium Hydroxide (10%) Boiling A A A A A A
Calcium Hydroxide (20%) Boiling A A A A A A
Calcium Hydroxide (50%) Boiling C B A A A A
Calcium Hyperchlorite (2%) 21 B A C C B B
Calcium Sulphate (saturated) 21 A A A A A B
Carbolic Acid (Phenol) Boiling A A A A A A
Carbonated water   A A A A A  
Carbon Bisulphide 21 A A A A A  
Carbon monoxide gas 871 A A - - - B
Carbon monoxide gas 760 A A - - - B
Carbon tetrachloride (pure) 21 A A A A A A
Carbon tetrachloride (aqueous solution - 5-10%) 21 C - A A A  
Chloracetic Acid 21 D C A A A A
Chlorbenzol Conc. (pure) 21 A A A A A  
Chloric Acid 21 E D D D D A
Chlorinated Water (saturated) 21 C B C C B A
Chlorine gas (dry) 21 C B C C C A
Chlorine gas (moist) 21 D C C C C A
Chlorine gas 100 E D A A A  
Chloroform 21 A A A A A A
Chromic Acid (5%) 21 A A A A A B
Chromic Acid (10% CP) Boiling C B C B C A
Chromic Acid (50% Com. Cont. SO3 Boiling D C - - - B
Chromium Plating Bath 21 A A C C A  
Citric Acid (5% still) 21 A A A A A A
Citric Acid (5% still) 66 A A A A A A
Citric Acid (15%) 21 A A A A A A
Citric Acid (15%) Boiling B A B A A A
Citric Acid (concentrated) Boiling C B B A B A
Copper Acetate (saturated sol.) 21 A A C C A  
Copper Carbonate (sat. solution in 50% NH_OH)   A A C C A  
Copper Chloride (1% agitated) 21 B A B B A  
Copper Chloride (1% aerated) 21 B A B B A  
Copper Chloride (5% agitated) 21 C B C C C  
Copper Chloride (5% aerated) 21 E D D D C  
Copper Cyanide (saturated solution) Boiling A A B B B A
Copper Nitrate (1% and 5%) 21 A A C C A B
Copper Nitrate (50% aqueous solution) Hot A A E E C B
Copper Sulphate (5%) 21 A A B B A A
Copper Sulphate (saturated solution) Boiling A A C C C A
Creosote (Coal Tar) Hot A A A A A A
Creosote Oil Hot A A A A A  
Cyanogen Gas 21 A A A A A  
Dinitrochlorbenzol (melted and solidified) 21 A A - - -  
Ether 21 A A A A A B
Ethyl Chloride 21 A A A A A B
Ethylene Chloride 21 A A A A A  
Ferric Chloride (1% solution - still) 21 B A B C C B
Ferric Chloride (1% solution - still) Boiling D C E E E B
Ferric Chloride (5% solution - still) 21 D C D D C B
Ferric Chloride (5% - agitated) 21 C C D D C B
Ferric Chloride (5% - aerated) 21 C C D D C B
Ferric Hydroxide (Hydrated Iron Oxide) 21 A A A A A  
Ferric Nitrate (1% and 5%) 21 A A D D A B
Ferric Sulphate (1% and 5%) 21 A A C C A A
Ferrous Sulphate (dilute sol.) 21 A A A A A B
Fluorine 21 E E A A A B
Formalin (40% sol. Formaldehyde)   A A A A A  
Formic Acid (5% still) 21 B A A A A A
Formic Acid (5% still) 66 B A A A A A
Fuel Oil Hot A A B B A A
Fuel Oil (containing sulphuric acid)   C B B B B A
Gallic Acid (5% solution) 21 A A A A A B
Gallic Acid (5% solution) 66 A A A A A B
Glue (dry) 21 A A A A A  
Glue (solution - acid) 21 B A A A A  
Glue (solution - acid) 60 B A A A A  
Glycerine 21 A A A A A A
Hydrochloric Acid (all concentrations) 21 E E B B C A/B
Hydrocyanic Acid   A A A A A A
Hydrofluosilicic Acid 21 E D A A B B
Hydrogen Peroxide 21 A A A A A A
Hydrogen Peroxide Boiling B A - - - A
Hydrogen Sulphide (dry)   A A A A A A
Hydrogen Sulphide (wet_   B A A A A A
Hyposulphite Soda (Hypo)   A A B A A  
Iodine   E D D D D A
Iodoform   A A - - - D
Lactic Acid (5%) 21 A A A A A B
Lactic Acid (5%) 66 B A A A A B
Lactic Acid (10%) Boiling D B C C B B
Lactic Acid (10%) 66 C B B B B B
Lead Molten B B D D B  
Linseed Oil 21 A A A A A  
Magnesium Chloride (1% and 5% - still) 21 A A A A A A
Magnesium Chloride (1% and 5% - still) Hot C B A A A A
Magnesium Sulphate Hot/Cold A A A A A B
Malic Acid Hot/Cold B A A A A B
Mayonnaise 21 A A A A A A
Mercuric Chloride (dilute solutions   E D D D D C
Mercury   A A A A A A
Methanol (Methyl Alcohol) 21 A A A A A A
Mixed Acids (53% H2SO4) Cold A A D D A  
Mixed Acids (45% HN03) Cold A A D D A  
Molasses   A A A A A A
Muriatic Acid 21 E E B B C  
Mustard 21 A A A B B A
Naphtha 21 A A A A A B
Naphtha (crude) 21 A A A A A B
Nickel Chloride (solution) 21 A A B B B B
Nickel Sulphate Hot/Cold A A A A A B
Niter Cake Fused B A - - -  
Nitric Acid (5% solution) 21 A A E E B A
Nitric Acid (20% solution) 21 A A E E A A
Nitric Acid (50% solution) 21 A A E E A A
Nitric Acid (50% solution) Boiling A A E E C A
Nitric Acid (65% solution) Boiling B B E E D A
Nitric Acid (concentrated) 21 A A E E A B
Nitric Acid (concentrated) Boiling D D E E D B
Nitrous Acid (5% solution) 21 A A D D A D
Oils (crude) Hot/Cold A A A A A  
Oils (vegetable, mineral) Hot/Cold A A A A A  
Oleic Acid 21 A A A A A A
Oxalic Acid (5%) Hot/Cold A A A A A B
Oxalic Acid (10%) 21 A A A A A B
Oxalic Acid (10%) Boiling B C B A B B
Paraffin Hot/Cold A A A A A B
Petroleum Ether   A A A A A  
Phenol   A A A A A A
Phosphoric Acid (1%) 21 A A A A A A
Phosphoric Acid (5%) 21 A A A A A A
Phosphoric Acid (10% - still) 21 C A B A A A
Phosphoric Acid (10% - agitated) 21 C B B B B A
Phosphoric Acid (10% - aerated) 21 C B C C B A
Picric Acid 21 A A - - - B
Potassium Bichromate 21 A A A A A  
Potassium Bromide 21 B A A A A B
Potassium Carbonate (1%) 21 A A A A A B
Potassium Carbonate (1%) Hot A A A A A B
Potassium Chlorate   A A A A A B
Potassium Chloride (1% and 5%) 21 A A A A A A
Potassium Chloride (1% and 5%) Boiling A A A A A A
Potassium Ferricyanide (5%) 21 A A - - - B
Potassium Ferrocyanide (5%) 21 A A - - - B
Potassium Hydroxide (5%) 21 A A A A A B
Potassium Hydroxide (27%) Boiling A A A A A B
Potassium Hydroxide (50%) Boiling B A A A A B
Potassium Nitrate (1% and 5%) 21 A A A A A B
Potassium Nitrate (1% and 5%) Hot A A A A A B
Potassium Oxalate   A A A A A A
Potassium Permanganate (5%) 21 A A A A A A
Potassium Sulphate (1% and 5%) 21 A A A A A B
Potassium Sulphate (1% and 5%) Hot A A A A A B
Potassium Sulphide (salt)   A A A A A  
Pyrogallic Acid   A A A A A  
Quinine Bisulphate (dry)   B A A A A  
Quinine Sulphate (dry)   A A A A A  
Rosin Molten A A A A A  
Sea Water   A A A A A A
Sewage   A A A A A  
Silver Bromide   B A - - - A
Silver Chloride   E E - - -  
Silver Nitrate   A A E E A A
Soap 21 A A A A A A
Sodium Acetate (moist)   A A A A A A
Sodium Bicarbonate (all concentrations) 21 A A A A A B
Sodim Bicarbonate (5% - still) 66 A A A A A B
Sodium Carbonate (5%) 21 A A A A A A
Sodium Carbonate (5%) 66 A A A A A A
Sodium Chloride (5% - still) 21 A A A A A A
Sodium Chloride (5% - still) 66 A A A A A A
Sodium Chloride (20% aerated) 21 A A A A A A
Sodium Chloride (saturated) 21 A A A A A A
Sodium Chloride (saturated) Boiling B A A A A A
Sodium Fluoride (5% solution)   B A A A A A
Sodium Hydroxide   A A A A A  
Sodium Hypochlorite (5% - still)   B A C C C A
Sodium Hyposulphite 21 A A A A A  
Sodium Nitrate Fused C B A B A B
Sodium Sulphate (5% -still) 21 A A A A A B
Sodium Sulphate (all concentrations) 21 A A A A A B
Sodium Sulphide (saturated)   B A A A A B
Sodium Sulphite (5%) 21 A A A A A B
Sodium Sulphite (10%) 66 A A A A A B
Stannic Chloride (Sp. G. 1.21) Boiling E E B B C  
Stannic Chloride (solution) 21 D C A B B  
Stannous Chloride (saturated)   C A A B B  
Stearic Acid   A A A A A  
Sulphur Chloride   E D A A A  
Sulphur Dioxide Gas (moist) 21 B A D C C  
Sulphur Dioxide Gas (moist) 302 A A - - -  
Sulphur (dry) Molten A A A A A  
Sulphur (wet)   B A B B A  
Sulphuric Acid (5%) 21 C B A A A B
Sulphuric Acid (5%) Boiling E C D A C B
Sulphuric Acid (10%) 21 C B B A B B
Sulphuric Acid (10%) Boiling E D C A C B
Sulphuric Acid (50%) 21 D C B A B B
Sulphuric Acid (50%) Boiling E D E E E B
Sulphuric Acid (concentrated) 21 A A B B B A
Sulphuric Acid (concentrated) Boiling D D E E E A
Sulphuric Acid (concentrated) 149 E E E E E A
Sulphuric Acid (fuming) 21 C B C B B B
Sulphurous Acid (saturated) 21 C B E E E B
Sulphurous Acid (saturated 60 lb pressure) 121 C B E E E B
Sulphurous Acid (saturated 70 - 125 lb pressure) 154 C B E E E B
Sulphurous Acid (150 lb pressure) 191 C B E E E B
Sulphurous Acid (sulphurous spray) 21 D D E E E B
Tannic Acid 21 A A A A A B
Tannic Acid 66 B A A A A B
Tartaric Acid 21 A A A A A B
Tartaric Acid 66 B A A A A B
Tin Molten C C E E E C
Trichloracetic Acid 21 E E B B B B
Varnish 21 A A A A A A
Varnish Hot A A A A A A
Vinegar Fumes   B A B A A A
Vinegar (still) 21 A A A A A A
Vinegar (agitated)   A A A A A A
Vinegar (aerated) 21 A A B A A A
Zinc Molten E E E E E  
Zinc Chloride (5% - still) 21 A A A A A B
Zinc Chloride (5% - still) Boiling B B B B B B
Zinc Sulphate (5%) 21 A A A A A A
Zinc Sulphate (saturated) 21 A A A A A A
Zinc Sulphate (25%) Boiling A A A A A A
Chemical /condition Temp
oC
304, 321,347
Stain. Stl.
316,316L
Stain. Stl.
Nickel Monel Iconel Hastalloy C


Links to Corrosion Resistance Tables
  1. Corrosion Doctors ...An excellent reference site for the very important topic of corrosion
  2. Omega...Chemical Chart-Some Plastics
  3. dultmeier...Relatively extensive Chemical Chart
  4. Chemical Compatibility ...Cole Porter ..American site with very clear information on chemical compatibility