[QUOTE=Julian M;287299]Does anyone know how othen you need to replace the dilute sulphuric acid
in the anodising tank.How do you know when it needs replacing?
THanks for any help
This probably will not be much help unless you have access to a better chemist than me, but this document tells you how to analyse the chemical composition of your electrolyte...
Annex A and B describe the tests.
I have no idea of the range that is acceptable for each component in the electrolyte.
Bring on the chemists!