Components & Accessories, Thermocouple, Manufacturer of Thermocouple,

Nutech Engineers
143-D Government Industrial Estate, Kandivli West, Mumbai - 400 067
Phone : 91-22-28683549 / 28684580,  Fax : 91-22-28674580
email : nutechen@vsnl.com , nutechen@bol.net.in,
info@nutechengineers.com,  sales@nutechengineers.com

Temperature Sensing Devices

SECTION - 7
Technical Information

Comparative Corrosive Ratings
For Carbon Steel, Inconel, Monel, Nickel, 303 Stainless Steel, 304 Stainless Steel, 316 Stainless Steel, and Teflon

This is chart is a guide to the selection of a corrosion resistant protection tube.  Changes in temperature, concentration, pressure. agitation, aeration, and impurities can nullify these ratings.  The only way to determine the suitability of a protection material in a media is by performance tests. Mechanical strength of the protection tube must also be considered.  Unless otherwise marked, all pressures and temperatures are atmospheric.  This listing does not imply that other materials are not suitable for use in the media listed.

IDENTIFICATION OF TRADE NAMED MATERIALS

Inconel, Monel                :    International Nickel Co.
Teflon                            :    E. I. DuPont.

                                    RATINGS

A    Substantial Resistance - Preferred material of construction.
B    Moderate Resistance - Satisfactory for use under most
      conditions; very slight swelling for elastomers.
C    Questionable Resistance - Use with caution.
D    Inadequate Resistance - Not recommended
X    No information available.

                                LIMITATIONS

1.    To 104oC.
2.    Subject to stress corrosion at high temperatures and in concentrated solutions.
3.    Subject to pitting at air solution line when solution is allowed to dry on metal surface

Corrosive Media

Corrosive Media

Acetate Solvents, Crude D A B B A A A Acetate Solvents, Pure C A A A A A A
Acetaldehyde, 100% X B A B A A A Acetic Acid, 95% D A A A B A A
Acetic Acid Vapors, 100%, Hot B B B B D B A Acetic Anhydride, Boiling D A A B B A A
Acetone B A A A A A A Alcohols B A A A A A A
Alum. Potassium, 10% D B B B B-3 A A Aluminum Chloride, 10% D B B B D C-3 A
Aluminum Chloride, 10%, Boiling D C C B D D A Aluminum Sulfate, 10% D A A A C B A
Aluminum Sulfate, <10%, Boil ding D B B B D B A Aluminum Sulfate, > 10%, Boiling D B B B D B A
Amines B A A A A A A Ammonia, Anhydrous B A A A A A A
Ammonium Chloride, 10% C A A A B-3 A A Ammonium Chloride, < 10%, Boiling D B B B D C-3 A
Ammonium Chloride, > 10%, Boiling D C B B D C-3 A Ammonium Hydroxide, Hot B A D D A A A
Ammonium Nitrate B A C C A A A Ammonium Persulfate, 5% D A D D A A A
Ammonium Phosphate, Dibasic, 5% D A B C A A A Ammonium Sulfate, < 10% C B A B B B A
Ammonium Sulfate > 10%, Boiling D B B B C-3 B-3 A Ammonium Sulfite, Boil ding D D C D C B A
Aniline Hydrochloride D B B B D C A Antimory Trichloride D B B B D C A
Asphalt B A A B A A A Barium Chloride, 5% C A A A A A A
Barium Chloride, >5%, Hot D B A A C-3 B-3 A Barium Hydroxide C A A A A A A
Barium Nitrate C B C C A A A Beer, 71oC C A A A A A A
Beet Sugar, Liquor, Hot B A A A A A A Benzene, Hot B A A A A A A
Benzoic Acid B A A A A A A Blood D A A A A A A
Borax, Hot B A A B A A A Boric Acid, 5%, Hot D A B B B B A
Bromine, Dry Gas D B A A D D A Bromine, Moist Gas D D C C D D A
Buttermilk D A A A A A A Butyric Acid, Dilute X A A A A A A
Butyric Acid, Hot, Conc. D B B C C B A Calcium Bi sulfite, Hot D D D D C B A
Calcium Chloride, Dilute C A A A B-3 A-3 A Calcium Hydroxide, 10%, Boiling D A A A A A A
Calcium Hydroxide, 20%, Boiling D A A A A A A Calcium Hydroxide, 30%, Boiling D A A A C B A
Calcium Hypo chloride, < 2% C B C C C-3 B-3 A Carbolic Acid, 90% C A B A A A A
Carbon Dioxide, Dry B A A A A A A Carbon Disulphide B A B B A A A
Carbon Tetrachloride, Dry, Hot C A A A B A A Carbonic Acid, Saturated D A A A A A A
Cloroacetic Acid D B B B D C A Chloric Acid D C C C D C A
Chlorinated Water, Sat. D C C C D C-3 A Chlorine, Dry Gas B A A A B B A
Chlorme, Moist Gas D D C C D C A Chlorosulfonis Acid, Dilute D B B A D B A
chromic Acid, Dilute B B B B B A A Chromic Acid, < 10%, Boiling D C C D C B A
Chromic Acid, > 10%, Boiling D C D D D C A Citric Acid, Dilute D A A B A A A
Citric Acid, Hot, Concentrated D B B B C B A Copper Nitrate, Hot, Concentrated D C D D A A A
Copper Sulfate, Hot, Concentrated D B C C B A A Creosote, Hot B A A A A A A
Cupric Chloride, < 2% D C B B B-3 B-3 A Cupric Chloride, 5% D D D C D C-3 A
Dichlorethane, Boiling D B A A B B A Ethyl Chloride A A A A A A A
Fatty Acids, 63oC C A A A B A A Ferric Chloride, < 1% D B C B C-3 B-3 A
Ferric Chloride, > 1% D D D D D D A Ferric Chloride, < 1%, Boiling D D D D D D A
Ferric Chloride, > 1%, Boiling D D D D D D A Ferric Nitrate, 5% D C D D B A A
Ferric Sulfate, 5% D B C C B-3 A A Ferrous Sulfate, 10% C B A A A A A
Flourine, Dry Gas C A A A C B A Flourine, Dry, 149oC D B A B D D A
Flourine, Moist Gas D B A B D D A Formaldehyde, 40% C A A A B A A
Formic Acid, < 50% D A B B B A A Formic Acid, > 50% D B B B B A A
Formic Acid, < 50%, Hot D B B B B A A Formic Acid, > 50%, Hot D B B B C B A
Freon, Wet C B A A C C A Fuel Oil, 60oC A A B B A A A
Furfural B B B B B B A Gasoline, Refined A A A A A A A
Clycerine A A A A A A A Hydrochloric Acid, < 1% D B B B D B A
Hydrochloric Acid, 1-20% D C B B D D A Hydrochloric Acid, > 20% D D D C D D A
Hydrochloric Acid, < 1/2%, 79oC D C B B D D A Hydrochloric Acid, 1/2-2%, 79oC D D C C D D A
Hydrochloric Acid, > 2%, 790C D D D D D D A Hydrochloric Acid, < 1/4%, Boiling D C B B D D A
Hydrochloric Acid, > 1/4-1%, Boiling D C C C D D A Hydrochloric Acid, > 1%, Boiling D D D D D D A
Hydrofluoric Acid, < 40% C C B B D D A Hydrofluoric Acid, > 40% C C B C D D A
Hydrofluoric Acid, Boiling D D B C D D A Hydrofluosilic Acid D B A B D C A
Hydrogen Chloride, Dry B A A A D C A Hydrogen Chloride, Moist D D C C D D A
Hydrogen Fluoride, Dry C A A A D C A-1 Hydrogen Peroxide, Boiling D B B B C B A
Hydrogen Sulfide, Dry B A A A A A A Hydrogen Sulfide, Moist C A B B B A A
Iodine, Dry D A A A D B A Kerosene A A A A A A A
Lactic Acid, 5% D A B B B A A Lactic Acid, 10% D A B B B A A
Lactic Acid, Boiling, 5% D B C C C B A Lactic Acid, Boiling, 10% D B C C D B A
Lead Acetate, Hot D B B C A A A Magnesium Chloride, Hot, 5% D A A A C-3 B-3 A
Magnesium Hydroxide B A A A A A A Magnesium Sulfate B B A B A A A
Magnesium Sulfate, Boiling C C A B A A A Mercury B A B-2 A A A A
Mercuric Chloride, < 2% D D D D D D A Mercuric Chloride, < 1/2%, Boiling D D D D D D A
Mercuric Cyanide D B D B B B A Methyle Chloride, Dry D A A A B B A
Milk D A B B A A A Molasses B A A A A A A
Naptha B A A A A A A Nickel Chloride D B B B C-3 B-3 A
Nickel Sulfate, Boiling D B A A C C A Nitric Acid, 20% D B D D A A A
Nitric Acid, Fuming D B D D B B A Nitric Acid, Boiling, 20% D C D D A A A
Nitric Acid, Boiling, 65% D D D D B B A Nitric Acid, Boiling, Conc. D D D D D D A
Nitrous Acid D B C C B B A Oxalic Acid, < 10% C A A A A A A
Oxalic Acid, 10% C A A A A A A Nitric Acid, Boiling, 65% D D D D B B A
Oxalic Acid, Boiling, 50% D B B C D C A Phosphoric Acid (Ortho), < 10% D A B B B A A
Phosphoric Acid (Ortho), 10-50% D A B C C A A Phosphoric Acid (Ortho), > 50% D A B C C A A
Phosphoric Acid (ortho), < 20%, 79oC D C B D D A A Phosphoric Acid (Ortho), > 20%, 79oC D D B D D B A
Phosphoric Acid (Ortho), < 10%, Boiling D D C D D B A Phosphoric Acid (Ortho), 85%, Boiling D D D D D C A
Picric Acid C D D D A A A Potassium Bromide D A A A C-3 B-3 A
Potassium Carbonate B A A A A A A Potassium Chlorate B A B B A A A
Potassium Chloride D A A B A-3 A-3 A Potassium Chloride, Hot D B A B C-3 B-3 A
Potassium Cyanide B B B B B B A Potassium Dichromate, Conc. C B B C A A A
Potassium Ferricyanide, 5% C B B B A A A Potassium Ferrocyanide, 5% C X B B A A A
Potassium Hydroxide, 50% B A A A A A A Potassium Hydroxide, 30%, 79oC D A A A A A A
Potassium Hydroxide, 50% 79oC D A A A B A A Potassium Hydroxide, 30%, Boiling D A A A B A A
Potassium Hydroxide, 50%, Boiling D A A A B A A Potassium Hypochloride, Dilute D X D C C-3 B-3 A
Potassium Permanganate, Dilute B B A A A A A Potassium Sulfate, Dilute B A A A A A A
Potassium Sulfate, Dilute, Boiling D B B B B B A Potassium Sulfide, Saturated C A C A A A A
Propane, Liquid and Gas B A A A A A A Pyrogalic Acid B B A A A A A
Rosil Molten D A A A A A A Salicylic Acid D B B B B B A
Silver Bromide D C B C B-3 A-3 A Silver Chloride D C B C D D A
Silver Nitrate X A C D A A A Sodium Acetate C A A A A A A
Sodium Bisulfate D B A B B B A Sodium Bisulfate, 60oC D C B C B B A
Sodium Bromide, Dilute X B A B B-3 A-3 A Sodium Carbonate, 5%, Hot B A A A A A A
Sodium Chloride, Dilute C A A A A A A Sodium Chloride, Saturated, Boiling D A A A C-3 B-3 A
Sodium Cyanide B B A B B B A Sodium Fluoride, 5% D B A A B-3 A-3 A
Sodium Hydroxide, 50% B A A A A A A Sodium Hydroxide, < 40%, 79oC D A A A A A A
Sodium Hydroxide, 40-80% 79oC D A A A A A A Sodium Hydroxide, < 30%, Boiling D A B A A A A
Sodium Hydroxide, > 30%, Boiling D A B A C B A Sodium Hydroxide, Molten D B B A D D D
Sodium Hypochlorite(Still), 5%) D C C C C-3 B-3 A Sodium Hyposulfite D B A A B A A
Sodium Nitrate B A B A B A A Sodium Perborate C A B B A A A
Sodium Peroxide C A B B A A A Sodium Phosphate, Tribasic C A A A A A A
Sodium Silicate B A B B A A A Sodium Sulfate (All concentrations) B B A A B A A
Sodium Sulfate, Hot D B A B C B A Sodium Sulfide, Saturated B A B A B-3 A A
Sodium Sulfite, Hot D C B C B A A Sodium Thiosulfate D B B B B A A
Stannic Chloride, <5% D D B B D D A Stannic Chloride, > 5% D D C D D D A
Stannic Chloride, SG 1.21, Boiling D D D D D D A Stannous Chloride, aturated D B B B D B A
Steam, 100oC A A A A A A A Steam 316oC C A A A A A D
Sulfite Liquors D D D D C B A Sulfur, Molten, 130oC B A A A B A A
Sulfur Chloride D B B B D C A Sulfur Dioxide, 121oC, Dry B B B B A A A
Sulfur Dioxide, Moist D D D D B A A Sulfuric Acid, < 2% D B B B C B A
Sulfuric Acid, 2-40% D B B B D D A Sulfuric Acid, 40% D B B B D D A
Sulfuric Acid, Concentrated B B D D B B A Sulfuric Acid, < 10%, Boiling D C B D D D A
Sulfuric Acid, 10-80%, Boiling D C B D D D A Sulfuric Acid, Concentrated, Boiling D D D D D D A
Sulfurous Acid, Saturated D D D D B B A Tannic Acid, 10% D B A A A A A
Tar, Hot B A B B A A A Tartaric Acid, 49oC D A A A B A A
Toluene A A A A A A A Trichlorethylene B A A A A A A
Turpentine B A A A A A A Varnish, Hot C A A A A A A
Vegetable Oils B A B B A A A Vinegar D A A A A A A
Water, Acid Mine D A C C A-3 A-3 A Water, Boiler Feed B A A A A A A
Water, Distilled D A A A A A A Water, Salt Sea D B A C C-3 B-3 A
Whiskey, Boiling D A C B A A A Wine D A C B A A A
Xylene, Boiling X A A B A A A Zinc Chloride, 5% D B B B C-3 B-3 A
Zinc Chloride, 5%, Boiling D D B C D D A Zinc Sulfate, Boiling D B A B A A A
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