Home /
Search 🔍
the Site

Chime right in! (no registration req'd)


"Burnt Plating"


Good day, it's me again.

This time my inquiry is regarding burnt plating. Recently we've encountered burning in the lower rail part of two of our products. One is a matrix type and one is standard IC type.

We employ strip-to-strip plating process, and there's ramp-up period, so we use dummy units before and after the production lots.

I've checked factors that I've read on books which may result to burning, such as:

1. Excessive current density - the current/voltage setting is ok.

2. Incorrect amount of Additives - the bath components are within specs, except for one additive with a reading of 3.9 ml/l (the specs is 4 -8 m/l). Is this significant?

3. No rectifier problem was raised during that time, the units were plated.

4. As for the shield height at the plating section, only one out of the 5 plating cells are off-specs, the entry point is off-specs by 9 mm.

5. In terms of anodes, daily replenishment is regularly performed. BTW, how do I know that they are already passivated?

Again, hope you could help us with this problem. What other areas should I check?

Again, Thank you very much.

Nats Pogi
- Pasay City, Philippines



Try increasing your plating metal concentration. You can evaluate your bath chemistry off-line in a hull cell. Bath pH is another factor you can adjust. Also, try increasing your distance between your anodes and your work.

Karl Weyermann
- Lebanon, Kentucky

finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start 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    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA