plating, anodizing, & finishing Q&As since 1989
Spotting on Zinc Phosphated GI Sheet
We are manufactures of panels, and in our painting line, we face a problem while zinc phosphateing on GI Sheets. White spots appeared on the surface after treatment. It happen only in GI after 7-10 days after fresh bath makeup. Please give a solutionShihab
Trading - Saudi Arabia
YOU MUST CHANGE YOUR PHOSPHATING SOLUTION,THE KEY QUESTION IS PHOSPHATING FORMULATION.Mi Dewei
WCSM - Wuhan, China
Could you spend a little more time to explain your idea?
What is the root cause for the white spots forming?
What is its chemical composition and metallurgical structure? How much it affect part anti-corrosion performance?
- Guelph, Canada
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