Corrosive Medium

Stainless Steel

Brass and Navel Bronze

Silicon Bronze

Copper

Nickel-
Copper (Monel)

Aluminum

Nylon

18-8, 302, 303, 304,305

316

410, 416, 430

Acetate Solvents, Crude

Excel

Excel

Good

Fair

Good

Good

Good

Excel

Good

Acetate Solvents, Pure

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Acetate Acid, Crude

Good

Excel

Poor 2

Fair 1

Good

Good

Good

Good

Poor

Acetate Acid, (Pure)

Good

Excel

Poor 2

Fair 1

Good

Good

Good

Excel

Poor

Acetic Acid Vapors

Good

Excel

Poor 2

Poor

Good

Good

Fair

Good

Poor

Acetic Anhydride

Good

Excel

Poor 2

Poor

Good

Good

Good

Excel

Poor

Acetone

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Acetylene

Excel

Excel

Excel

3

Poor

Poor

Good

Excel

Alcohols

Excel

Excel

Excel

Good

Excel

Excel

Excel

Good

Good

Aluminum Sulfate

Fair

Good

Poor 2

Fair 1

Good

Good

Good

Fair

Poor

Alums

Fair

Good

Poor 2

Fair 1

Good

Good

Good

Excel

Fair

Ammonia Gas 4

Excel

Excel

Excel

Poor 5, 6

6

6

6

Excel

Good 36

Ammonium Chloride

Fair

Excel

Fair

Fair 1

Good

Good

Excel

Poor

Fair

Ammonium Hydroxide

Excel

Excel

Excel

Poor

Poor

Poor

Fair

Good

Good 36

Ammonium Nitrate

Excel

Excel

Excel

Poor

Fair

Fair

Fair

Excel

Fair

Ammonium Phosphate (Ammoniacal)

Excel

Excel

Excel

Poor

Poor

Poor

Good

Poor

Good

Ammonium Phosphate (Neutral)

Excel

Excel

Good

Fair

Fair

Fair

Good

Fair

Excel

Ammonium Phosphate (Acid)

Good

Excel

Fair

Fair 1

Fair

Fair

Good

Fair

Fair

Ammonium Sulfate

Excel

Excel

Good

Fair 1

Fair

Fair

Good

Good 35

Fair

Asphalt

Excel

Excel

Good

Good

Excel

Excel

Excel

Excel

Excel

Beer

Excel

Excel

7

Good

Good

Good

Excel

Excel

Excel

Beet Sweet Liquors

Excel

Excel

Good

Good

Excel

Excel

Excel

Excel

Good

Benzene or Benzol 8

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Benzine 8

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Borax

Excel

Excel

Excel

Good

Good

Good

Excel

Good

Good

Boric Acid

Good

Excel

Fair

Fair 1

Good

Good

Excel

Excel

Good

Butane, Butylene, Butadiene 9

Excel 10

Excel 10

Excel 10

Excel 34

Excel 34

Excel 34

Excel

Excel

Excel

Calcium Bisulfite

Good

Excel

Poor

Poor

Good

Good

Poor

Poor

Good

Calcium Hypochlorite

Fair

Good

Poor

Fair

Fair

Fair

Fair

Poor

Fair

Cane Sugar Liquors

Excel

Excel

Good

Good

Excel

Excel

Excel

Excel

Good

Carbon Dioxide (Dry)

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Carbon Dioxide (Wet & Aqueous)

Excel

Excel

Excel 11

Fair 11

Good 11

Good 11

Good 11

Excel

Excel

Carbon Disulfide

Excel

Excel

Good

Fair

Poor

Poor

Fair

Excel

Excel

Carbon Tetrachloride 12

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Chlorine (Dry)

Good

Good

Good

Good

Good

Good

Excel

Poor

Poor

Chlorine (Wet)

Poor

Fair

Poor

Poor

Fair

Fair

Fair

Poor

Poor

Chromic Acid

Good

Excel

Fair

Poor

Poor

Poor

Fair

Poor

Poor

Citric Acid

Good

Excel

Fair

Fair 1

Good

Good

Good

Good

Good

Coke Oven Gas

Excel

Excel

Excel

Fair

Fair

Fair

Good

Good

Fair

Copper Sulfate

Excel

Excel

Excel

Poor

Fair

Fair

Fair

Poor

Fair

Core Oils

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Cottonseed Oil

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Creosote

Excel

Excel

Excel

Fair

Good

Good

Excel

Good

Ethers

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Ethylene Glycol

Excel

Excel

Excel

Good

Excel

Excel

Excel

Good

Good

Ferric Chloride

Poor

Poor

Poor

Poor

Poor

Poor

Poor

Poor

Poor

Ferric Sulfate

Excel

Excel

Excel

Poor

Fair

Fair

Fair

Good

Poor

Formaldehyde

Excel

Excel

Excel

Good

Good

Good

Excel

Good

Good

Formic Acid

Good

Excel

Poor

Fair 1

Good

Good

Good

Poor

Poor

Freon

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Good

Excel

Furfural

Excel

Excel

Excel

Good

Good

Good

Excel

Excel

Excel

Gasoline (Sour)

Excel

Excel

Fair

Fair

Poor

Poor

Poor

Poor

Excel

Gasoline (Refined)

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Gelatin

Excel

Excel

Fair 13

Fair 13

Excel 13

Excel 13

Excel

Excel

Excel

Glucose

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Glue

Excel

Excel

Excel

Fair

Excel

Excel

Excel

Fair

Excel

Glycerine or Glycerol

Excel

Excel

Excel

Good

Excel

Excel

Excel

Excel

Good

Hydrochloric Acid

Poor

Poor

Poor

Poor

Fair 14

Fair 14

Fair 14

Poor

Poor

Hydocyanic Acid (Hydrogen Cyanide)

Excel

Excel

Fair

Poor

Poor

Poor

Good

Excel

Excel

Hydrofluoric Acid

Poor

Poor

Poor

Poor

Fair

Fair

Excel

Poor

Poor

Hydrogen Fluoride

Good

Good

Fair

Fair

Good

Good

Excel

Poor

Poor

Hydrogen 9

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Hydrogen Peroxide

Excel

Excel

Excel

Poor

Fair

Fair

Good

Good

Fair

Hydrogen Sulfide (Dry)

Excel

Excel

Good

Fair 6

Poor 6

Poor 6

Fair 6

Excel

Good 37

Hydrogen Sulfide (Wet & Aqueous)

Good

Excel

Fair 15

Fair

Poor

Poor

Fair

Excel

Good 37

Lacquers and Lacquer Solvents

Excel

Excel

Excel

Fair

Excel

Excel

Excel

Excel

Excel

Lime-Sulfur

Excel

Excel

Good

Poor

Fair

Fair

Good

Poor

Good

Magnesium Chloride

Good

Excel

Fair

Fair

Good

Good

Excel

Poor

Excel

Magnesium Hydroxide

Excel

Excel

Excel

Good

Excel

Excel

Excel

Fair

Good

Magnesium Sulfate

Excel

Excel

Excel

Good

Excel

Excel

Excel

Good

Excel

Mercuric Chloride

Poor

Fair 16

Poor

Poor

Poor

Poor

Poor

Poor

Mercury

Excel

Excel

Excel

Poor

Poor

Poor

Good

Poor

Excel

Milk

Excel

Excel

Good

Fair

Fair

Fair

Fair

Excel

Excel

Molasses

Excel

Excel

Good

Good

Excel

Excel

Excel

Excel

Excel

Natural Gas

Excel

Excel

Excel

Good

Excel

Excel

Excel

Excel

Excel

Nickel Chloride 17

Fair

Good

Poor

Poor

Fair

Fair

Good

Poor

Poor

Nickel Sulfate 17

Good

Excel

Fair

Fair

Good

Good

Excel

Poor

Poor

Nitric Acid

Good

Good

Good 18

Poor

Poor

Poor

Poor

Fair

Poor

Oleic Acid

Good 20

Excel

Good 20

Fair 19

Good 24

Good 24

Excel

Excel

Excel

Oxalic Acid

Good

Excel

Fair

Fair

Fair

Fair

Excel

Poor

Poor

Oxygen 9

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Good

Palmitic Acid

Good 20

Excel

Good 20

Fair 19

Good 24

Good 24

Excel

Excel

Excel

Petroleum Oils (Sour)

Excel

Excel

Fair

Fair

Poor

Poor

Poor

Poor

Excel

Petroleum Oils (Refined)

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Phosphoric Acid 25%

Fair 23

Excel

Poor

Poor

Good 21

Good 21

Good 22

Poor

Poor

Phosphoric Acid 25%, 50%

Poor

Good

Poor

Poor

Good 21

Good 21

Good 22

Poor

Poor

Phosphoric Acid 50%, 85%

Poor

Good

Poor

Poor

Good 21

Good 21

Good 22

Excel

Excel

Picric Acid

Excel

Excel

Good

Poor

Poor

Poor

Poor

Fair

Poor

Potassium Chloride

Good

Excel

Fair

Fair

Good

Good

Excel

Poor

Excel

Potassium Hydroxide

Excel

Excel

Excel

Poor

Fair

Fair

Excel

Poor

Good 38

Potassium Sulfate

Excel

Excel

Excel

Good

Excel

Excel

Excel

Excel

Excel

Propane 9

Excel 10

Excel 10

Excel 10

Excel

Excel

Excel

Excel

Excel

Excel

Rosin (Dark)

Excel

Excel

Excel

Good

Good

Good

Excel

Excel

Excel

Rosin (Light)

Excel

Excel

Excel

Poor

Poor

Poor

Good

Good

Excel

Shellac

Excel

Excel

Excel

Good

Excel

Excel

Excel

Excel

Excel

Soda Ash (Sodium Carbonate)

Excel

Excel

Excel

Good

Good

Excel

Excel

Poor

Excel

Sodium Bicarbonate

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Good

Excel

Sodium Bisulfate

Poor

Excel

Poor

Fair 1

Good

Good

Excel

Fair

Fair

Sodium Chloride

Good

Excel

Fair

Fair

Good

Good

Excel

Good

Excel

Sodium Cyanide

Excel

Excel

Excel

Poor

Poor

Poor

Good

Poor

Good

Sodium Hydroxide

Excel

Excel

Excel

Poor

Fair

Fair

Excel

Poor

Good 38

Sodium Hypochlorite

Fair

Excel

Poor

Excel

Fair

Fair

Fair

Poor

Fair

Sodium Metaphosphate

Excel

Excel

Good

Fair

Good

Good

Excel

Fair

Excel

Sodium Nitrate

Excel

Excel

Excel

Fair

Good

Good

Excel

Excel

Excel

Sodium Perborate

Excel

Excel

Excel

Fair

Good

Good

Excel

Fair

Sodium Peroxide

Excel

Excel

Excel

Fair

Good

Good

Excel

Fair

Fair

Sodium Phosphate (Alkaline)

Excel

Excel

Excel

Fair

Good

Good

Excel

Poor

Good

Sodium Phosphate (Neutral)

Excel

Excel

Excel

Good

Excel

Excel

Excel

Poor

Excel

Sodium Phosphate (Acid)

Good

Excel

Poor

Fair 1

Good

Good

Excel

Poor

Fair

Sodium Silicate

Excel

Excel

Excel

Fair

Good

Good

Excel

Good

Good

Sodium Sulfate

Excel

Excel

Excel

Good

Excel

Excel

Excel

Excel

Excel

Sodium Sulfide

Excel

Excel

Excel

Poor

Poor

Poor

Good

Poor

Good

Sodium Thiosulfate (Hypo)

Excel

Excel

Excel

Poor

Poor

Poor

Good

Excel

Good 39

Sludge Acid

Poor

Fair

Poor

Poor

Good

Good

Good

Poor

Stearic Acid

Good 20

Excel

Good 20

Fair 19

Good 24

Good 24

Excel

Excel

Excel

Sulfur

Excel

Excel

Excel

Fair

Fair

Fair

Fair

Excel

Good

Sulfur Chloride

Fair

Good

Poor

Poor

Poor

Poor

Good

Poor

Poor

Sulfur Dioxide (Dry) 9

Excel

Excel

Excel

Fair

Excel

Excel

Excel

Good

Good

Sulfur Dioxide (Wet)

Good

Excel

Poor

Poor

Good

Good

Poor

Fair

Fair

Sulfuric Acid 10%

Poor

Good 25

Poor

Poor

Good 25

Good

Good 25

Poor

Poor

Sulfuric Acid 10%, 75%

Poor

Poor

Poor

Poor

Fair

Fair

Good

Poor

Poor

Sulfuric Acid 75%, 95%

Fair 27

Good 27

Fair 27

Poor

Fair 26

Fair 26

Fair 2

Poor

Poor

Sulfuric Acid 95%

Good

Good

Good

Poor

Fair

Poor

Poor

Fair

Poor

Sulfurous Acid

Fair

Good

Poor

Poor

Good

Good

Poor

Poor

Fair

Tar

Excel

Excel

Good

Good

Excel

Excel

Excel

Excel

Excel

Tartaric Acid

Good

Excel

Fair

Fair 1

Good

Good

Good

Good

Fair

Toluene or Toluol 8

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Trichloroethylene 12

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Good

Turpentine

Excel

Excel

Good 28

Fair 28

Excel

Excel

Excel

Excel

Excel

Varnish 29

Excel

Excel

Excel

Good

Good

Good

Excel

Excel

Excel

Vegetable Oils 29

Excel

Excel

Excel

Good

Good

Good

Excel

Excel

Excel

Vinegar 25

Good

Excel

Fair

Poor

Good

Good

Good

Excel

Fair

Water (Acid Mine Water)

31

31

31

Poor

30

30

30

Fair

Good

Water (Fresh)

Excel

Excel

Excel

Fair 32

Good

Good

Excel

Excel

Excel

Water (Salt)

Good 33

Good 33

Fair 33

Fair 32

Good

Good

Excel

Good

Excel

Whiskey

Excel

Excel

Fair

Good

Good

Good

Good

Fair

Excel

Wines

Excel

Excel

Fair

Good

Good

Good

Good

Fair

Excel

Xylene or Xylol 8

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Excel

Zinc Chloride

Poor

Good

Poor

Poor

Good

Good

Excel

Poor

Good

Zinc Sulfate

Good

Excel

Fair

Fair

Good

Good

Excel

Good

Good 39

2.  May Be useful with cold dilute acid.

3.  Alloys containing up to 60 percent copper acceptable; high copper alloys not acceptable.

4.  Temperature assumed to be below that at which gas cracks and liberates nascent nitrogen.

5.  Subject to stress corrosion with low concentrations.

6.  Apparently resistant to dry gas at ordinary temperatures; attacked rapidly by moist gas and by hot gas.

7.  Not recommended for use with beverage grade.

8.  Chemicals used for treating in manufacture assumed to be absent.

9.  Temperature assumed to be no higher than that normally encountered in compression, storage, and distribution.

10.  Useful at elevated temperatures.

11.  Not recommended for use with carbonated beverages.

12.  Water assumed to be absent.

13.  Not recommended for use with edible grades.

14.  Only with dilute or unaerated solutions.

15.  Subject to stress corrosion by moist gas; and to severe general corrosion by saturated acqueous solution.

16.  Subject to stress corrosion.

17. None of these materials recommended for use with nickel plating solutions.

18.  Higher choromium alloys (over 18 percent) preferred.

19.  Not recommended for temperatures over 212° F (100° C).

20.  Alloys with less 18 percent Cr. not recommended for temperatures over 212° F (100° C).  Other not recommended for temperatures over 392° F (200° C).

22.  Up to 194° F (90° C).

23.  At room temperature.

24.  Not recommended for temperatures over  392° F (200° C).

25.  Non-ferrous alloys preferred when unaerated and at temperatures above normal.  Stainless Steel best when aerated and at normal to moderate temperatures.

26.  With cold acid only.

27.  In the absence of exposure to moist air.

28.  Crude produce may contain acids which corrode these materials.

29.  Some of these ratings may not apply when handling light colored products at elevated temperatures of 392° F (200° C).

30.  Good with water containing no oxidizing salts; fair with water containing no oxidizing salts.

31.  Excellent with water containing oxidizing salts; not good with water containing no oxidizing salts.

32.  Subject to dezincification with hot and /or aerated waters.

33.  Subject to pitting attack.

34.  Copper may act as a catalyst for undesirable reactions.

35.  Free sulphuric acid absent.

36.  Good at concentrations under 10 percent and below 100° F (38° C).

37.  Suitable for limited service at concentrations under 50 percent and below 100° F (38° C).

38.  Good only at concentrations under 10 percent and below 100° F (38° C).

39.  Good only at concentrations under 20percent and below 100° F (38° C).