No registration or passwords; no pop-up ads -- just aloha, fun, & answers.
(as an eBay Partner & Amazon Affiliate earns from qualifying purchases).
Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Advertise
 
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

Conductivity and Throw





If the conductivity of a plating solution is increased(i.e. by adding acid or cyanide), then will the throw of that solution also be increased?

I would expect that solution efficiency would increase due to increasing conductivity since resistance losses would be less, however, usually increased efficiency results in loss of throw, right?

Michael Brewington
- Salisbury, Maryland, USA
2002



First of three simultaneous responses --

I believe you are right on all counts, Mike.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2002


 


Second of three simultaneous responses --

There is throwing power and there is micro throwing power. The first is the mass of metal that you can plate and the second is the ability to plate in tiny crevices and recesses. Sometimes when you increase throwing power you will get a very poor (bad) plate. Speed is not always the optimum.

James Watts
- Navarre, Florida
2002



Third of three simultaneous responses --

Some years ago elder people (over 40) used to learn by reading pieces of paper glued together called books. They still exist and come in all sort of fashions and specialties. Internet, though fast and powerful still can't beat a good specialized book. About your question, there is also something called polarization that plays an important role in throwing?

Guillermo Marrufo
Monterrey, NL, Mexico
2002



Efficiency and throw increase with increased conductivity in acid solutions. But in cyanide copper solutions raising the cyanide content above the upper limit will decrease the efficiency because of the tight complexing of copper allowing hydrogen to be plated in preference to copper. the same is true of zinc and Cadmium solutions except it takes a very large excess above the optimum to cause a significant difference.

don baudrand
Don Baudrand
Consultant - Poulsbo, Washington
(Don is co-author of "Plating on Plastics" [on Amazon or AbeBooks affil links]
           and "Plating ABS Plastics" [on Amazon or eBay or AbeBooks affil links])
2002




(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  -  ©1995-2024 finishing.com, Pine Beach, New Jersey, USA  -  about "affil links"