Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989





-----

Alkaline zinc





2005

I have problems with alkaline zinc - hanging. He refers to very badly. Content of zinc is 8,5 g/l and NaOH 135 g/l Has perhaps who experience with Protolux 3000?

Vlasta Baùiè
- Maribor, Slovenia



2005

Protolux solutions don't cope well with high concentrations of Sodium Carbonate. If the concentration is above 60 g/l you would expect quite a drop in solution efficiency.

Dougie Lightfoot
- Fife, Scotland



First of two simultaneous responses -- 2005

Try to maintain 1:10 ratio Zinc:Sodium Hydroxide.
Ideal composition for vat is 12:120
and for Barrel is 14:140
Needless to say that the additives you use should be from reputed and proven source.
Presently This is not a problem

t k mohan
T.K. Mohan
plating process supplier - Mumbai, India



Second of two simultaneous responses -- 2005

It sounds to me that your having problems keeping your metal content up. 135 g/l sodium hydroxide is ok but 8.5 g/l sounds a little low.

We help the dissolution of zinc by using zinc domes in mild steel cages. The rust from the mild steel helps lots. I run my non-cyanide zinc tanks with a metal content of about 10-11.5 g/l

Chris Matthews
- East Sussex, England




(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:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2023 finishing.com, Pine Beach, New Jersey, USA