Preparation method of corrosion-resistant cerium-containing Zn-Cu-Ti coating

The invention discloses a preparation method of a corrosion-resistant cerium-containing Zn-Cu-Ti coating, which comprises the following steps: (1) selecting high-quality sponge titanium and pure copper particles as raw materials, proportioning according to the ratio of 1: 1, and smelting by using a vacuum electric arc smelting furnace with an electromagnetic stirring condition to prepare a Cu-50Ti intermediate alloy; (2) weighing a pure zinc block and a pure cerium block according to a mass ratio of 50: 1, and smelting by using a common resistance furnace to prepare a zinc-cerium intermediate alloy; and (3) during hot dipping, the component Zn-0. 75Cu-0. 15Ti-Ce is firstly smelted, a Zn block is firstly melted, and the Cu-50Ti intermediate alloy and the zinc-cerium intermediate alloy are put into the molten Zn block. (4) before hot dipping, the Q235 surface is subjected to auxiliary plating treatment; and (5) the hot dipping temperature is set to be 700 DEG C, after dipping is conducted for 20-30 s, the steel