It is a corrosion-resistant film intended to provide rust prevention on aluminum materials, which contains no hexavalent chromium, a substance which became regulated under RoHS directive in Europe and so forth as an environmentally hazardous substance.
A corrosion-resistant film which contains zirconium instead of chromium.
The film is colorless and transparent. However, the base material becomes slightly whitened by activation (etching) which is the preprocessing and thus the finished appearance becomes slightly whiter.
It is equivalent to the colorless hexavalent chromium chemical conversion coating (Alodine, etc.).
The coating on aluminum casting and die cast products will be inferior to the coating on aluminum alloys in corrosion resistance as the film is affected greatly by the base material.
|24 hours ～||○||○||×|
|72 hours ～||○||×||ー|
○・・・No corrosion ×・・・Corrosion observed
Surface irregularity may occur if the material is being re-treated after peeling.