plating, anodizing, & finishing Q&As since 1989
Electroless nickel wastewater treatment
September 21, 2010
I am engineering student and I am looking for a form to give to treatment to the water of remainder of a line of electroless nickel, as well as to the bath that already expired its time of life. I have reviewed inverse osmosis, evaporation, ionic interchange and carbamates.Frias Jesus
student - Tijuana B.C. Mexico
September 29, 2010
Electroless nickel bath becomes spent after a few turnovers. This is mainly because of the build-up of the oxidation products following oxidation of the reducing agents used in these baths.
Pumping the spent solution to a separate tank, addition of alkali or alkaline earth metal salts to precipitate the oxidation product, removal by filtration, adjustment of the bath constituent to the desired level and re-use is one option.
Electrodialysis is another useful method.
T.S.N. Sankara Narayanan
- Chennai, Tamilnadu, India
(ed.note Nov. 2017: The good doctor has a fascinating blog at https://advancementinscience.wordpress.com)