Quote:
|
Originally Posted by seanc
Dave:
I do use phosphoric extensively to iron phosphate steel parts (prior to powder coat), but was not aware that it was used for zinc. If this is what you're using, is it possible that the phosphate is causing the smut?
|
The smut is coming from the electocleaning they get acid dipped after cleaning.
Quote:
|
Originally Posted by seanc
You have to see it to believe it.
|
Looks like I'll be picking up some nitric acid tomorrow. What strength do you use?
Dave