Page 28 - PCMI Journal December 2021
P. 28
Pre-Treatment – Preparation of Metal Surface
Sean Hill, Product Manager, Eternal Technology Corporation
8/31/21
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Surface Preparation Controls
1. Water Break Test = Surface Contaminates 2. Wet Hole Check = DFV Prevention
3. Rinse Water Flow = Contaminate Removal 4. Rinse Water pH = Resist Adhesion
5. Brush Footprint = Abrasion / Smear
6. Chemical Control = Cleaning Effectiveness 7. Visual Inspection = Stains, Contaminates
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Surface Preparation
Water Break Indicator
The water break test continues to be the best indicator of a properly cleaned surface
A panel is dipped into a tank of clean water and should hold a sheet of water for about 30 seconds without any de-wetting.
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Issue 138 December 2021 PCMI Journal 28
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