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TYPE OF AIRCRAFT CORROSION

TYPE OF AIRCRAFT CORROSION

  • First, the corrosion is defined as the deterioration of metal by a chemical or electrochemical attack like sulfate or oxide, on aircraft is made of metal and create damage to the structure, it’s important to protect the metal in manufacture the first time for protection.
  • This protection exists in many ways inside base metal is produce resistant alloy against corrosion or by addition chemical conversion coating or by paint to the surface, usually the main source of corrosion is the water vapor that contains salt combine with oxygen in the atmosphere.
  • the important thing to know is corrosive location and length of time of exposure metal for the metal concerned .and there is some Concentration Cell Corrosion is Metal Ion Concentration Cells and Oxygen Concentration Cells and Active-Passive Cells.

SOME TYPE :

GALVANIC CORROSION :

  • Is happen when there two metals have an electrical contact with the presence of an electrolyte, the level of corrosion depends on reaction activity between two metals and the size parts.

Intergranular Corrosion:

  • This type of corrosion is attacking the grain boundaries of commonly results from a lack of uniform in alloy structure of aircraft, and is penetrate deep then make mechanical weakening on the structure, is located with no visible surface evidence and can detect by ultrasonic.

Exfoliation Corrosion:

  • It makes metal lifting up their surface grain by force of expanding corrosion that is a product and occur on the grain boundaries just below the surface of this structure, this type is difficult to detect in initial and also can detect by ultrasonic.

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