Protection of magnesium alloys by aluminum plating from ionic liquids
AssigneeSikorsky Aircraft Corporation
InventorsXiaomei Yu, Mark R. Jaworowski, Daniel V. Viens, Joseph J. Sangiovanni
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Abstract
A method for electroplating aluminum metal on a magnesium alloy includes providing an Lewis acidic ionic liquid having dissolved species of an aluminum metal salt; pre-treating a surface of the magnesium alloy including subjecting the surface of the magnesium alloy to a reverse current etching in the ionic liquid; electroplating the aluminum metal on the surface using the ionic liquid as the electrolyte; and subjecting the surface of the magnesium alloy to a post-treatment including neutralization rinsing in a rinsing solvent solution.
Claims18
A method for electroplating aluminum metal on a magnesium alloy comprising:
- providing a Lewis acidic ionic liquid having dissolved species of an aluminum metal salt;
- subjecting a surface of the magnesium alloy to a pre-treatment process including reverse current etching the surface of the magnesium alloy in the ionic liquid;
- electroplating the aluminum metal on the surface using the ionic liquid as the electrolyte;
- and
- subjecting the surface of the aluminum coated magnesium alloy to a post-treatment including neutralization rinsing the aluminum coated magnesium alloy in a solvent solution of ethyl amine in acetone.
A method for electroplating aluminum metal on a magnesium alloy comprising:
- providing a Lewis acid ionic liquid having dissolved species of an aluminum metal salt;
- subjecting the magnesium alloy to a conversion treatment bath to form a conversion coating containing magnesium fluoride on the surface;
- hot-dipping the magnesium alloy in the ionic liquid following the subjecting in the conversion treatment bath;
- subjecting a surface of the magnesium alloy to a reverse current etching in the ionic liquid;
- electroplating the aluminum metal on the surface using the ionic liquid as the electrolyte;
- and
- subjecting the surface of the aluminum coated magnesium alloy to a post-treatment including neutralization rinsing the aluminum coated magnesium alloy in a solvent solution of ethyl amine in acetone.
Dependencies are inferred from the claim text.