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Why are aircraft coated in Green during manufacturing/Production stage?

 Why are aircraft coated in Green during manufacturing/Production stage?

  • Have you ever wondered why aircraft during in its production stage most of its structural elements are coated in green before its final finishes, which is in most of the cases white. In production and manufacturing stage the bare Aluminium alloy structure is painted greenish. What you see is not paint, it is known as Zinc Chromate primer.
The reason why green coating zinc chromate primer is used solves following purposes:
  • 1 Provide a base for the topcoat or paint.
  • 2 Provide a barrier between harmful elements during maintenance and in atmosphere to prevent surface corrosion of base metal.
  • 3 Prevent corrosion of base metal Aluminium by giving cathodic protection. Zinc is anodic to Aluminium thus susceptible to corrosion and hence save aircraft structure from galvanic corrosion.


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