-- The Home Page of the Finishing Industry
23+ years of serious education, promoting Aloha,
& the most fun you can have in metal finishing smiley
    no popups, no spam
on this site
current topics
topic 7457

Plating Problem


Q. Sir:

I'm looking for the causes and solutions of a plating problem such as non adhesion of plate (non-plate problem).

Thank you in advance.

John Fernandez
- Philippines


A. John, your question is too broad until you tell us:

Please get back to us.

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey


A. Ted is right, you will need to get more specific to get a good answer. Potential causes of bad adhesion will depend on the situation. Here are a few causes of bad plating adhesion that I know of: Electroplating always includes a cleaning process. This often is a combination of a cleaner/degreaser, and electrocleaner, and an acid etch. If the parts do not get sufficiently clean, then contaminants can prevent the plating from making a good chemical bond to the metal and can later flake or peel off.

My company often bends plated tubing. We sometimes will get plating that flakes off the tube. We investigated and found out that if plating thickness is too high, then the tube will act like an icy tree branch and the plating will crack away.

The third case I can think of is with plating bath maintenance. One of the additives that platers sometimes add to zinc plating baths is called a brightener. A brightener does what you think, it helps brighten plating. The big problem with brightener is that it is organic and can't easily be measured for concentration. That means a plating bath may become too concentrated with brightener. Too much brightener causes delayed flaking of plating. The nasty aspect is the delay. In this case, a plater will ship nice parts and the customer later opens up a box, sees the plating flaked off, and gets enraged that a plater would let horrible parts like this pass quality checks.

tim neveau
Tim Neveau
Rochester Hills, Michigan


Q. Sir:

Good day. I'm doing my technical presentation on the causes and solutions to the non-adhesion of SnPb to my substrate copper. The process my substrate goes thru is Chemical Deflashing - Rinsing - Electrocleaning - Rinsing - Activation Cu - Predip - SnPb Plating - Rinsing - Neutralizing - Rinsing - Drying.

By the way, I'm using an in-line plating process.

Thank you in advance. More power!

P.S. Please send me some pictures or facts about non-adhesion. 

John Fernandez [returning]
- Philippines

"Electrodeposition: The Materials Science of Coatings and Substrates"
by Jack Dini

from Abe Books
info on Amazon

A. Hi again, John. Tim has given you a great start with three roads to travel. But responses from strangers on the internet will not comprise the authoritative source you'll want to quote for such studies. Please try to get hold of a good electroplating book. For the specific issue of "Adhesion", I recommend Jack Dini's "Electrodeposition" =>
... which has a chapter by that title investigating the science of the matter. Good luck.


Ted Mooney,
Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to 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 may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.