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  • Any repair process which breaks the surface of the original structure requires a protective treatment. The treatment acts as a paint base and corrosion inhibitor when applied prior to the installation of repair parts.

  • Unclad aluminum alloys or magnesium of the original structure repair subsequent alodining in case s where repair processes expose the considerable area to possible corrosion.

  • Unclad aluminum alloy and chamfered edges of clad aluminum alloy repair parts require alodining.
  • Structural components whose surfaces have not been damaged beyond the limits of allowable damage or whose surfaces have been damaged by corrosion must be reprotected.

  • Alodine is a chemical conversion coating that’s mostly used to protect aluminum from corrosion. It’s primarily used to passivate aluminum as it protects this metal and serves as a base for paint coatings. It leaves aluminum unaffected, so it’s easier to put paint over it without changing anything.

Chem film goes by several different names and designations:
* Chromate conversion coating
* Alodine
* Iridite coating
* Yellow iridate

  • Chem film is applied by dipping, brushing, or by spraying it. Many often combine it with Type II anodizing as it can help repair many different yet small damages done to anodized surfaces.
  • Besides the protection against corrosion it can offer, as well as making a base for later painting, alodine also protects aluminum against the loss of electrical conductivity.

  • Before applying alodine, must use alumprep and clean the metal throughly, Additionally, the coating can also improve the adhesion of both paint and primer by a significant amount, as long as you apply it to the surface of the aluminum before the primer.

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