Breathe easy! No registration or passwords; no maddening pop-up or floating ads :-)

Home /
Search 🔍
the Site
pub Where the world gathers for
plating, anodizing, & finishing Q&As since 1989


Aluminium Nickel Plating Blistering when stressed

July 9, 2012

Q. We have a aluminium panel with about 20 D-Sub holes to mount RF connectors.

The aluminium panel is with electroless Nickel Plating finishing and is with thickness of 1.6 mm

After installing the connectors to the panel, and after a few days, we noticed there are blistering around the connectors. We tried to remove the blistering layers and it just peeled off and left with a surface without finishing.

58702-1 58702-2

However, among all the connectors, there is one which is not having such problem but with only some tightening mark on the panel.

What could be the possible cause of this problem? Is it due to the surface is not clean enough before plating or is it due to the plating process?

Doe Ng
- Penang, Malaysia

August 4, 2012

A. Hi Doe,

Not sure if your aluminium panel is zincate treated prior electroless nickel. As aluminium oxidize easily which affect adhesion of subsequent plating on top, zincate treatment (deposit a very thin zinc coating on aluminium surface by immersion dip into zincate chemistries) usually apply before plating on aluminium to enhance adhesion between aluminium and subsequent plating.

Hope this help.


David Shiu
David Shiu
- Singapore

August 9, 2012

A. We did have the zincate prior to nickel plating.
So guess this is not the main root cause.

Doe NG
- Penang, Malaysia

August 9, 2012

A. Hi Doe.

I interpret it opposite to the way you do.


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

August 14, 2012

A. I agree with Ted, it is the how.
Do you practice double zincate?
How do you strip the first zincate?
Please send a comprehensive description of your preplate cycle so we can try to assist you.

sara michaeli
sara michaeli signature
Sara Michaeli
Tel-Aviv-Yafo, Israel

(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:

Chemicals &
Consult'g, Train'g
& Software

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