The invention provides a method for electrogalvanizing on the surface of
magnesium lithium alloy. The method comprises the following steps:
polishing, oil removal,
etching, activating,
zinc immersion,first-time pre-electrogalvanizing, second-time pre-electrogalvanizing and
drying. The surface of the
magnesium lithium alloy is subjected to electrogalvanizing by an
electroplating method, a conventional
magnesium alloy surface
electroplating pretreatment process is adopted, priming is implemented by a
zinc immersion process, then a process of two-time electrogalvanizing is carried out, the
binding force of a
coating is not affected on the premise of simplifying procedures, the preparation speed of the
coating is increased, and the
corrosion resistance of the magnesium
lithium alloy is improved; and moreover,
zinc oxide and zinc
sulfate serve as main salts, experimental results are good, moreover, the zinc
oxide and the zinc
sulfate are non-toxic and tasteless, and are low in price and wide in operation range, and the method belongs to an
environmentally friendly process. By the method, the
corrosion resistance of the magnesium lithium alloy is improved effectively, the cost is reduced, the method is simple to operate,
batch production can be implemented, and moreover, the method can further serve as a pretreatment technology for
electroplating of other metals later.