Electrode plate and surface treatment method thereof

Abstract

The disclosure provides an electrode plate and a surface treatment method thereof. The surface treatment method firstly adopts a special annealing process to process the electrode plate to form a Mg film on the surface of the MgAl alloy material layer, and then make the Mg film chemically react with the fluoride ion to form a MgF 2 film on the surface of the Mg film or the Mg film is converted into a MgF 2 film entirely. Due to the dense structure and chemical stability of MgF 2 film, the fluoride ion corrosion resistance of the electrode plate is improved. The surface of the electrode plate of the disclosure includes a MgF 2 film capable of being used as a protective layer to protect the MgAl alloy material layer. Therefore, the electrode plate has excellent corrosion resistance against fluoride ions and can improve the quality of film formation by chemical vapor deposition.

What is claimed is: 
     
         1 . An electrode plate comprising:
 a magnesium fluoride film on a surface of the electrode plate; and   a magnesium-aluminum alloy material layer under the magnesium fluoride film.   
     
     
         2 . The electrode plate according to  claim 1 , wherein the magnesium fluoride film is disposed on a surface of the magnesium-aluminum alloy material layer, and a thickness of the magnesium fluoride film is from 5 to 10 μm. 
     
     
         3 . The electrode plate according to  claim 1 , wherein a magnesium film is further disposed between the magnesium-aluminum alloy material layer and the magnesium fluoride film, and a total thickness of the magnesium film and the magnesium fluoride film is from 5 to 10 μm.