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50040
Sudden high pH in e-coat bath
September 19, 2008
My e-coat bath jumped from a PH 6.1 TO 6.7 in one day. My DI water
appears good. My paint supplier is performing bacteria test. Any
other ideas?
Chet Sweatman
Paint Manager - Georgia

September 24, 2008
Hi Chet,
Has there been a change in the appearance or thickness of the coating
or opacity of the bath? If not I would suspect the pH meter. ED
resins can cause severe fouling of pH electrodes and subsequent
significant errors.
Harry Parkes
- Birmingham, West Midlands, United Kingdom
September 25, 2008
Hi Chet,
If the coating quality/properties are unchange, I suspect the pH
meter. Electrodes are easily contaminated and give errors.
Harry Parkes
Harry Parkes
- Birmingham, West Midlands, United Kingdom
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