Corrosion Data

Corrosion Data

Corrosion may be caused by adverse exterior conditions in the Atmosphere, such as Salt Molecules present in the air, due to proximity of the Manufacturing plants close to the Sea Coast or due to emissions of Acids and other such corrosive substances into the Atmosphere by other Plants in adjoining locale. For instance, Aluminum Windows and Doors tends to oxidize if they are close to sea coast or used in Highly Corrosive Plant Areas. Corrosion in Values often results from Chemical Interaction between the Valve Body and the Agent through which it passes.

The following chart recommends the right body (Metal/Lining) Applications to handle Specific Chemicals. Other considerations to keep in mind while making selections of Valve Body include Temperature of the Media Flowing through Speed (Pressure) at which the-Media is flowing, whether the Media is Liquid or Slurry, Impurities present in the Media, and so on.

GM valves are available in a combination of exterior body, Inner Lining, Pressure Class Ratings, Filtering devices for both Liquid and Slurry Applications.

 

CORROSIVE

Cast Iron Carbon Steel Bronze St.St.F 304 St.St.F 316 St.St. 12% Cr Monet

Acetic Acid-Pure

C C C B A A A

Acetic Acid-10%

C C C B A A A

Acetic Acid-Anhydride

C C C B B B

B

Alcohol Methyl 150°F

B B B A A A

A

Alcohol Methyl (Methanol)

B B B B A B B

Ammonia-Conc.% Aq .Sol.

A A D A A A

B

Ammonia Gas

A A D A A A B

Ammonium Chloride-Still

D D D B A C A

Ammonium Sulphate 1% & 5%-Agit. & Aer.

C C C B A C

B

 

Ammonium-Saturated

C C C C A C

B

AAmyl Acetate

C C B B B C B

Aniline

C C C B B C

B

Arsenic Acid – 150°F

D D D B B C D

Asphalt

B B A A A A

A

Barium Chloride-Sat.

C C B A A C B

Barium-Aqueous Sol.

C C C B A C

B

Benzoic Acid

D D B A A C B

Benzol

B B A A A A

A

Boric Acid

D D B A A B

A

Butane Gas

B B A B B B B

Butyric Acid

D D C A A A

B

Calcium Bisulphate

D D D B A C

D

Calcium Carbonate

D D C B A C A

Calcium Chloride

C C B C B C

A

Calcium Hydrochloride

D D D C C D D

Carbon Tetrachloride

B B B A A A

B

Carbonic Acid

D D D B A C A

Chlorine-Dry Gas

B B C B B B

B

Chlorine-Moist

D D D D D D C

Chromic Acid

C C D B A C

B

Citric Acid-5%-Still

D D C A A A A

Citric Acid – Sat.

D D C B A B

A

Copper Nitrate

D D D A A A C

Copper Sulphate

D D D A A A

B

Creosote-crude

A A C A A A A

Dowtherms

B B A A A A

A

Ethers

B A B A A B D

Ethyl Alcohol

B B B A A B

B

Ethylene Glycol

A A A A A A A

Ferric Chloride

D D D D D D

D

Ferric Sulphate

D D D B A C C

Ferrous Chloride

D D D D D D

D

Ferrous Sulphate

D D B B B B B

Fluorine

D D D D D D D

Formaldehyde-cold

B A A A A A A

Formic Acid

D D B C A C

B

Furfural

B A A A A A

A

Gasoline Sour

B B C A A B

B

Gasoline Refined

B A A A A A A

Gelatine

D D B B A C

A

Glucose

B B A A B B

A

Glue-Dry

B A A A A A A

Glycerine

B B B A A A

A

Hydrochloric Acid (Muriatic)

D D D D D D C

Hydocyanic Acid

C C D A D D

B

Hydrofluoric Acid

D D C D A D B

Hydrogen-Gas

B B B A A A

A

Hydrogen Peroxide

C C D A A B D

Hydrogen Sulphide-Dry

B B D A A B

C

Hydrogen Sulphide-Wet

C C D A A B D

Iodine-Dry-Wet

D D D D D D

D

Kerosene

B B A A A A A

Laquer Solvents

B B B A A B

B

Lactic Acid-1%

D D D A A B C

Lactic Acid-5%

D D D A A B

C

Lactic Acid-5%-Boiling

D D D A B D D

Lactic Acid-10%-150°F

D D D B C D

D

Lactic Acid-10%-70°F

D D D B C D D

Lime Sulphur

A A D A A A

B

Linseed Oil

A A B B B B B

Lubricating Oil-Sour

C C D A A B

C

Water(Fresh)

C C A A A A A

Water Distilled (Labor Grade)

D D C A A D

C

Lubrication Oil-Refined

A A B A A A B

Magnesium Chloride

C C B B B B

B

Magnesium Hydroxide

C C C A A B A

Magnesium Sulphate

C B B B B C

B

Mercuric Chloride

D D D D C D C

Mercury

A A D A A A

B

Methane Gas

B B A B B B B

Methylethylketone

A A A A A A

A

Milk (Fresh or Sour)

D D B A A B A

Naphtha (Crude or Pure)

B B B A A B

B

Natural Gas

B B B A A A A

Nickel Chloride

D D D B B C

B

Nickel Sulphate

D D B B B D B

Nitric Acid-Crude

D D D C B D

D

Nitric Acid-5%+50%

D D D A A A D

Nitric Acid- Conc. 70°F

D D D A A A

D

Nitric Acid-Conc. Boiling

D D D C B D D

Nitric Acid-Fuming Conc. 110°F

D D D A A B

D

Nitric Acid-Fuming Conc. Boiling

D D D D D D D

Nitrobenzene

B B D B A B

B

Oils-Miner. & Vegetable

B B B A A B B

Oxalic Acid-10% – 70oF

D D B D C D

D

Oxalic Acid – 10% – Boiling

D D B D C D D

Oxygen

B B A A A A

A

Petroleum Oils – Crude

B B C A A A A

Phosphoric Acid – Crude

C C D D D D

D

Phosphoric Acid – 5% & Boiling

D D D A A B C

Phosphoric Acid – 10% Still

D D D B A C

C

Phosphoric Acid – 10% Agitated

D D D C D D D

Phosphoric Acid – 10% Aer.-Boil

D D D D A D

D

Picric Acid

C C D A A C C

Potassium Chloride

B B B C C B

B

Potassium Cyanide

B B D A A B B

Potassium Hydroxide – 5% Still

A A D A A A

A

Potassium Hydroxide – 50% Boil

B A D A A A A

Potassium Nitrate

B B B A A A

B

Propane Gas

B B A A A A A

Sea Water

D D B B A D

A

Soap Solution

B A A A A A A

Sodium Bicarbonate

C C B A A A

B

Sodium Bicarbonate-5+50%

B B B A A A B

Sodium Chloride

C C B B A C

A

Sodium Cyanide

B B D B B A B

Sodium Hydroxide

B C B B A C

A

Sodium Hypochlorite

D D D C B D C

Sodium Nitrate

B B B B A B

B

Sodium Phosphate (di-Basic)

C C C B B C B

Sodium Phosphate (tri-Basic)

B B D B B C

B

Sodium Sulphate

B B B B A B A

Sodium Sulphide

B B D B A B

A

Steam

A A C A A A A

Stearic Acid – Conc.

C C C A A C

B

Sulphur – 500°F – Molten

C C D A A B B

Sulphur Dioxide

B B B A A B

A

Sulphuric Acid -< 10%

D D C C B D A

Sulphuric Acid -50% + 70°F

B B A A A B

A

Sulphuric Acid -50% Boil

D D D D D D C

Sulphuric Acid-Conc. 70°F

B B A A A B

A

Sulphuric Acid-300°F

D D C D D D C

Sulphuric Acid – Fuming

D D C C B D

C

Sulphuric Acid – Sat.

D D C C B D C

Sulphuric Acid – Spray

D D D C C D

D

Tannic Acid – 10%

C C B A A C B

Tannic Acid – 10% – Boil

D D C C C D

C

Tar

A A A A A A A

Tartaric Acid – 70°F

D D B A A C

A

Tartaric Acid – 150°F

D D B B A B B

Trichloroethylene

C C B B B C

A

Turpentine

B B B A A B A

Tomato Juice

C C C A A B

A

Vinegar

D D B A A A A

Zinc Chloride

C D D D D C

B

Zinc Sulphate

D D B B B C  B

Note : A – Good Resistance; B – Satisfactory; C – Poor; D – Not Recommended;