Pretreatment of Aluminum Alloys Surfaces

Hydrated Oxide Region Hydrated A1203 and MgA1204 

Amorphous Barrier Film A1203 and possible MgA1204 

The reactive species of TMS in plasma react with the stable oxides created by the chemical pretreatment, which is dependent on the type of alloys, and form chemical bonds between the oxides and the depositing plasma polymer. This step is 

Some Cr and F Incorporated in Outer Oxide Residual From Certain Cleaning Chemistries 

The corrosion resistance of aluminum and At alloys is largely due to the protective oxide film, which can attain a thickness of about 10 A within seconds on a freshly exposed aluminum surface [8]. A good corrosion protection system should include protection of the oxide layer and, in addition, should provide a good adhesive base for subsequent paint. The conventional corrosion protection system of aluminum 

---