AM.I.G.K4
KnowledgeCorrosion-prone areas in aircraft.
From the FAA library
- Chapter 8: Cleaning & Corrosion Control › Galvanic Corrosion › Common Corrosive Agents
Galvanic Corrosion Galvanic corrosion occurs when two dissimilar metals make electrical contact in the presence of an electrolyte. [Figure 8-18] The rate which corrosion occurs depends on the difference in the activities. The greater the difference in activity ... faster corrosion occurs. The rate of galvanic corrosion also depends on the size of the parts in contact. If the surface area of the corroding metal is smaller than the surface area of the less active metal, corrosion is rapid…
- Chapter 8: Cleaning & Corrosion Control › Corrosion Prone Areas › Miscellaneous Trouble Areas
Miscellaneous Trouble Areas Helicopter rotor heads and gearboxes, in addition to being constantly exposed to the elements, contain bare steel surfaces, many external working parts, and dissimilar metal contacts. Inspect these areas frequently for evidence of corrosion. The proper maintenance ... lubrication, and the use of preservative coatings can prevent corrosion in these areas. All control cables, whether plain carbon steel or corrosion-resistant steel, are to be inspected to determine their condition at each inspection period. In this process, inspect…
- Chapter 8: Cleaning & Corrosion Control › Corrosion
Chapter 8: Cleaning & Corrosion Control Corrosion Many aircraft structures are made of metal, and the most insidious form of damage to those structures is corrosion. From the moment the metal is manufactured, it must be protected from the deleterious effects ... environment that surrounds it. This protection can be the introduction of certain elements into the base metal, creating a corrosion-resistant alloy, or the addition of a surface coating of a chemical conversion coating, metal, or paint. While…