Eruptions in Die-Cast Parts

Appearance

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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Common Coating Problems

Eruptions in Die-Cast Parts

Eruptions in Die-Cast Parts - Common Coating Problems

Appearance

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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