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SULPHOCHROMIC PICKLING - BATH COMPOSITION

I NEED TO KNOW THE COMPOSITION OF A SULPHOCHROMIC BATH FOR TREATMENT OF ALUMINUM SURFACES.

AHMED SAUD KHAN
WINGS & WHEELS - RAWALPINDI, PAKISTAN
2002

2005

Sulphochromic bath contains sulfuric Acid and Chromic Acid solutions in De-mineralized water. This bath is heated to about 70 °C and used as a pickle bath during anodizing process. i.e., it removes the oxidation from aluminium surface. Parts are dipped for a very short time, rinsed thoroughly (preferably in demin water) and then loaded in anodizing bath for anodizing.

Najeeb
Karachi

Muhammad Najeeb
Aviation Maintenance - Karachi, Pakistam

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