I was not able to get all these data from manufacturing guys.
However they told me that they found an issue with zinc layer: it was too big > 18 microns, when they reduced to 12 microns the bubbles disappeared.
Hallo collagues,
I would like to describe an issue to seek possible solution.
I have a tubular component, which is Zinc plated (12 microns) & subsequently has #Coating (25 microns).
We see some bubbles (or blisters) in the surface (see photo), and e-coating supplier says that it's due to too...
