Occasional, random
eruptions and/or pock marks.
Probable Causes
Microcavities
containing air in the metal. The air expands during curing,
erupting (outgassing) and leaving either a small eruption
or a crater.
Suggested Solutions
1. Force the
eruptions prior to coating by preheating the parts to a
temperature above the cure temperature. If no blisters appear,
let parts cool, then coat and cure. If blisters still appear,
advise your customer.
2. Select coating with lower cure temperature.
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