Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

finishing.com -- The Home Page of the Finishing Industry

The authoritative public forum
for Metal Finishing since 1989
-----

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

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: