Daniel

Topic: Black deposits on dummying

Hello

My name is Daniel Hernandez, i actually decided to put to work an old watts solution i have fogotten somewhere in my workshop, and the situation is as follows:

The piece i use for dummying is peeling on the border and showing black deposits, it burns easily. Does anybody know what type of contaminant is causing this?

thanks!
Attachments:

Imagen 004.JPG

Last edited by Daniel (03/25/2009 - 01:38 AM)

DustinGebhardt

Re: Black deposits on dummying

Looking at your picture, it is hard to say for sure.  In my experience, high-current-density (HCD) problems can come from organic contamination or chromium contamination.  i would suggest you do a high-ph peroxide and carbon treatment, then run your tests again.  If you have an AA, check the chromium.

-Dustin Gebhardt,
CEF
Plating Engineer
Danaher Tool Group
Gastonia, NC

Daniel

Re: Black deposits on dummying

Thanks a lot!

I will do high pH treatment, and peroxide with activated carbon, and i will look it again.

i dont have an AA, but by the way what is an AA?

i have another picture where i can see some black bands

does it gives any clue? 


Attachments:

  Imagen 031.jpg