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



-----

Freshness of electroless nickel bath vs. speed





April 8, 2010

Hi,

Does the freshness of the solution affects how well my electroless Nickel deposition goes? I've prepared my solution 2 weeks ago and the deposition was fine and uniform. As week goes on, I've tried another attempt but at a longer period time in the deposition bath. The end results was only a slight deposition. This make me think that did the freshness of my solution affected my results?

Another quick follow up is that, the thickness of your nickel deposition is proportional to the time you soaked into a bath?

Edwin Jian Xiang Pang
R&D - Malaysia



First of two simultaneous responses --

Most electroless Ni is initially made up at 100% which makes it fast. After that you need to do the recommended analysis and replenish the appropriate amount. Most EN's are replenished to the 95% of the original for best results.
Deposition depends on time,temperature, pH and concentrations.

Analyze and keep the factors within the operations manual limits for optimum results.

Do not forget the agitation requirements and the tank stripping requirement.

James Watts
- Navarre, Florida
April 9, 2010



Second of two simultaneous responses -- April 11, 2010

Edwin,
Yes. Nickel deposition from EN bath is proportional to the dipping time in the bath. It also depends on a lot of other factors :
1. Your bath MTO.
2. Bath temperature.
3. Nickel content
4. Bath pH

SK Cheah
- Penang, Malaysia


Check the MTO and orthophosphite content, if these go beyond optimum the bath performance will go down

ANVER SULAIMAN
- Mysore, Karnataka, INDIA
April 29, 2010



May 4, 2010

Edwin,

The gap /older the solution, surely decreases the plating rate, as there are by-products as impurities in the bath of chemical reactions. You need to remove them to improve the plating rate.

regards

Keshava Prasad M
- Chennai, India


Fresh bath will contribute to optimum alloy deposition, once the bath aging, the rate of deposition decrease. This is because of the products saturation.

Cia Ming Thong
- Kuching, Sarawak, Malaysia
May 20, 2010




(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"