I Stainless Steel:Degrees of Corrosion in Various Solutions
About Stainless Steel

Solutions

Service Conditions

SuS304 SuS316 SuS410 SuS430
Nitric Acid

5%

Room Temperature

 A A B －
Nitric Acid

40%

Room Temperature A A B －
Nitric Acid

40%

Boiling A A D －
Sulfuric Acid

5%

Room Temperature C B D E
Sulfuric Acid

5%

Boiling E C E E
Hydrochloric Acid Room Temper E E E －
Phosphoric Acid

30%

Boiling A A － －
Phosphoric Acid

65%

Boiling B B － －
Phosphoric Acid

85%

Boiling E E － －
Acetic Acid

50%

Room Temperature A A － A
Acetic Acid

50%

Boiling C B E E
Acetic Acid

100%

Room Temperature A A － －
Acetic Acid

100%

Boiling C B E －
Acetic Anhydride Boiling A A E C
Oxalic Acid

5%

Warm A A B －
Oxalic Acid

10%

70℃ A A － －
Oxalic Acid

10%

Boiling D C － －
Formic Acid

5%

70℃ B A D －
Formic Acid

5%

150℃ B A D －
Hydrogen Sulphide － B A － －
Ferrous Chloride

1%

70℃ B* A* C* －
Ferrous Chloride

1%

Boiling D* C* － －
Calcium Chloride 70℃ B* A* － －
Ammonium Chloride

1%

70℃ A A A －
Ammonium Chloride

20%


Boiling A A － －
Ammonium nitrate Boiling A A A A
Ammonium nitrate

10%

21℃ A A B B
Naphtha 21℃ A A A A
Fuel Oil 21℃ A A B A
Gasoline 21℃ A A A A
Benzol Warm A A A A
Acetone 21℃ A A B A
Chloro Benzol 21℃ A A － A
Creosote (Coal Tar) Warm A A － －
Ethylene Glycol 21℃ A A B A
Ethylene Tricholoride 21℃ B A C －
Digester Acid  21℃ B B － C
Soda Ash

10%

93℃ A A A A
A: Good corrosion resistance 
  Degree of corrosion < 0.10 
  g/m2/hr
 
B: Fairly good corrosion
  resistanceDegree of
  corrosion 0.10~1.00 g/m2/hr
 
C: Poor Corrosion resistance
  Degree of corrosion  
  1.00~3.00 g/m2/hr
 
D: Very Poor Corrosion
resistance Degree of
corrosion 3.00~10.00
  g/m2/hr
 
E: Bad Corrosion resistance
  Degree of corrosion > 10.00 
  g/m2/hr
* Liable to suffer from pitting

 
 
 
 

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