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Oxidizing (QPQ)

This also a salt bath process and part of Nitriding process. After completion of salt bath Nitriding the parts will quenched directly in to oxidizing bath, operating at the temperature of 380 degree - 400 degree C soaking for a 30 minutes and cooling water quickly in Nitriding and it Saturates with oxygen thus increase in the overall corrosion resistance of treated parts. After oxidizing process the part will have uniform and good black in color

Advantages : -

Excellent in corrosion resistance

Better sliding property

Further improve in wear resistance

The growth and the size retention compare to cooling in water

Improved surface appearance

Control Test : -

Visual test

Dimensional test

Metallurgical test

Salt Spray test

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