Aloha, fun & authoritative answers -- no cost, no registration, no passwords, no popups
(as an eBay Partner & Amazon Affiliate we earn from qualifying purchases)

Home /
T.O.C.
Fun
FAQs
Good
Books
Ref.
Libr.
Adver-
tise
Help
Wanted
Current
Q&A's
Site 🔍
Search
pub  Where the
world gathers for metal finishing
Q&As since 1989



-----

Electroless Nickel: need intro and technical info




Q. Hi I am a student
I have a project on electroless coating. I chose electroless nickel but I don't find hypophosphite sodium in our country. Please help me with what I should do !!
Is there any substitute or must I change to electroless copper!
Thank you a lot.

Billel billel
Student - Algeria
January 29, 2023


"Electroless Plating"
by Mallory & Hajdu

on AbeBooks

or eBay or

Amazon

(affil links)

A. Hi Billel. Other potential reducing agents are sodium borohydride or dimethylamine borane. These don't produce nickel phosphorous deposits of course.

Maybe a local or university library can get you a good book on electroless nickel plating ⇨

If not, the paper that Ken Vlach suggests below is a start :-)
Luck & Regards,

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




⇩ Closely related postings, oldest first ⇩



"Chemical (Electroless) Nickel Plating"
by G. G. Gawrilov

on AbeBooks

or eBay or

Amazon

(affil links)

Q. I'm looking for technical information about Electroless Nickel, could you help me?

Ismael Colmenares Marroquin
engineer - Puebla, Mexico
2004


A. Hello Ismael,
In one sentence, electroless nickel is an autocatalytic process that deposits a nickel alloy, usually nickel-phosphorous, in a smooth even layer that is hard, corrosion-resistant, and conductive.

Our list of books includes two books about electroless nickel as well as entries like the Metal Finishing Guidebook, which has an introductory chapter.
"Products Finishing" magazine ran an annual electroless nickel conference for years, from which proceedings are available, and which cover the subject is tremendous detail.
Good luck!

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


A. Macdermid has several pages of technical information on EN coatings. To access: Home page -> Industrial Products -> Products -> Electroless Nickel -> Properties. Engineering, Mechanical and Physical Properties are given.

Heatbath has descriptions of their Nitec® low, medium and high-phosphorus ENs.

Surface Technology, Inc. gives deposit properties of each of their EN products.

The Nickel Development Institute (www.nidi.com) has an informative publication "Properties and Applications of Electroless Nickel" at http://www.nidi.org/multimedia/technical_support/technical_literature_pdfs/10000_technical_series/10081.PDF

Ken Vlach [deceased]
- Goleta, California
contributor of the year Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.



Ed. note: Those companies and trade groups still exist, but the directions to specific literature no longer work. The Nickel Institute is now at www.nickelinstitute.org, and the referenced paper can be found at https://www.nickelinstitute.org/media/1769/propertiesandapplicationsofelectrolessnickel_10081_.pdf



Q. 1. Suggest ways to get a smooth and good electroless nickel deposition on ABS component in an electroless nickel bath.

2. Is air agitation required in an electroless nickel bath?

Rajan Hora
- Delhi, India
2002


A. Dear SIR,

To keep your electroless nickel in good working conditions I suggest the next.

1-avoid over heating
2-adjust pH at 9 with AMM sol.
3-continuous filtration
4-avoid excess reducing agent[hypo phosphite]
5-at the end the working day reduce the PH again to 7 with H2SO4

Make sure that you make double rinsing before E.N bath about your question yes air agitation is very important with best wishes of very stable bath.

RAAFAT ALBENDARY
- Cairo, Egypt


"Plating on plastics"
by Don Baudrand & Gurd Mueller

on AbeBooks

or Amazon

(affil links)

A. Hi Rajan,
The answer to your second question is yes, air agitation is required.
The answer to your second question is "only with a robust cleaning, etching, and plating-on-plastics pretreatment process followed by proper electroless nickel process as described by Raafat. But the whole plating on plastic process is a bit difficult to detail in a few paragraphs. I think you'll need to get access to some some books unless you can provide some detail about the steps you are doing.

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


 

thumbs up sign Dear Mr Raafat Albendary,

Thanks for your prompt reply. I have applied your suggestions and have found them to be extremely useful. Thanks once again.

Regards,

Rajan Hora
- Delhi, India


sidebar

Q. Dear Mr. Raafat/ Mr Mooney,

Thanks for the reply to my earlier query. Your suggestions were extremely useful.

My question : What precautions we are supposed to take to get a smooth and good finish in Electroless copper solution?

Regards,

Rajan Hora [returning]
- Delhi, India
 

A. Hi again, Rajan. Sorry to inconvenience you, but the site is intended for reference as well as interactive help; and for each poster hundreds of readers are looking for reference material. Therefore we don't want threads about introduction to electroless nickel to drift into discussions about ideal operational parameters and troubleshooting of electroless copper processes.
Please search the site for "electroless copper" and post your questions on a promising thread.

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




"Electroless Nickel Plating: Fundamentals to Applications"
by Fabienne Delaunois et al

on AbeBooks

or eBay,
or

Amazon

(affil links)

"Electroless Nickel Plating"
by Wolfgang Riedel

on AbeBooks

or oreBayor
Amazon

(affil links)

Q. Hi All,

I'm doing my M.S project on Electroless Nickel on Mild steel.
I've selected the following bath composition:
Nickel Sulphate : 40 g/l
Hypophosphite: 24 g/l
Sodium acetate: 17 g/l
acetic acid [on eBay or Amazon] : 10 cc/l
lead acetate : 1 ppm
pH: 4.6-4.7
Temp.: 85 °C
with air agitation.

But I got no layer on mild steel substrate.

Can anyone help me what is the problem? Is there any problem with my bath composition? can anyone suggest better composition percentage with above mentioned chemicals?

Also please advise what is the best pretreatment process (including activation)
I have done this pretreatment process:
1- immersion in 20% sodium carbonate / washing soda [affil links] 20-30 min
2- rinsing with distilled water
3- cleaning in dilute acid with 5V as cathode or anode
4- rinsing with distilled water
5- immersion in 30% HCl + 10% H2SO4 60-120 Sec
6- cleaning in dilute acid with 5V as cathode or anode
7- rinsing with distilled water

What have I done wrong ?

Many thanks in advance for your help.

Iman Vafaei
Sharif University of Technology - Tehran, Iran
2007


A. Slowly increase your pH to 5.2-5.4 (w/ammonium hydroxide) and temperature to 90 °C. It should work. If it doesn't, prepare a new bath without lead acetate, which may be added after the bath has started. If it still doesn't work, maybe they gave you the wrong chemicals or they are contaminated. For academic purposes, it may be O.K. but remember this is an old recipe to make-up a new bath. It doesn't tell you what you should replenish and when. Your bath will be very unstable and have a very low turnover life. It will also co-deposit some lead which is a very toxic and regulated metal. Modern and successful plating plants use proprietary formulations that overcome these problems.

Guillermo Marrufo
Monterrey, NL, Mexico


none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages



(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"