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Pine Beach, NJ

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sulfuric acid electrolyte gets crystallized at heat exchanger

What can be the reason for crystallization of sulfuric acid anodizing electrolyte at heat exchangers (plate type) of an industrial anodizing installation?
Parameters:
Concentration: 160 g/l H2SO4 - Al (+3) : 16 g/l
Chiller water temp: 7 °C
H2SO4 electrolyte temp: 16 °C

Erol Deniz
Aluminum anodising - Istanbul, Turkey
2006

You are probably seeing aluminum sulphate crystalize out as your aluminum content is a bit high and it is less soluble at low temperatures.

James Watts
- Navarre, Florida
2006

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