Metallography Test

Parameters :

ü  Failure Analysis

ü  Corrosion Resistance

ü  Decarburization

ü  Internal defects

ü  Coating Thickness

ü  Grain Size

ü  Inclusion Rating

ü  Grain Size 

ü  Wall Thickness

ü  Microstructure

ü  Case Depth

ü  Surface defects

ü  Salt Spray test 

The sample is subjected to accelerated corrosion in various corrosive equipments and the impact of the corrosion in estimated in the material by way of mechanical testing or loss of weight.

Intergranular Corrosion test as per ASTM A 262

• Practice A (Oxalic Acid Etch Test)
• Practice B (Ferrous Sulphate-sulphuric acid)
• Practice C (Boiling in Nitric Acid)
• Practice E (Copper Sulphate-Sulphuric Acid 15hrs.)
• Practice F (Copper Sulphate-Sulphuric Acid 72hrs)

Pitting Corrosion Test as per ASTM G48

Salt Spray Test per ASTM B117

Stress-Corrosion Cracking test as per ASTM G35