Compound method for preparing magnesium alloy having superhydrophobic surface

The invention relates to a compound method for preparing a superhydrophobic surface of magnesium alloy, which comprises the following steps: carrying out chemical etching on the surface of the magnesium alloy with sulfuric acid to construct a primary minute structure, and then simultaneously constructing a secondary structure and carrying out low-surface energy modification on the surface of the magnesium alloy by an anodic oxidation process to obtain the magnesium alloy surface which enables water drops not to adhere easily and has fine superhydrophobicity. The technical method of the invention has the following advantages: 1) the contact angle between the prepared magnesium alloy surface and water is up to 160 degrees, and the surface has low adhesion and excellent superhydrophobicity; 2) the superhydrophobic surface is prepared by combining chemical etching and electrochemical processes, thereby achieving better hydrophobicity and stability; 3) the construction of the secondary structure and the low-surfac