The invention relates to a water base non-chrome
zinc-
aluminium coating and methods for preparing and using the same. The
coating is prepared by proportionally mixing a component A and a component B; the component A contains 50-150g / L of lamellar
metal powder, 145-290ml / L of
organic solvent, 10-200ml / L of deionized water, 10-36ml / L of
reducing agent and 5-15ml / L of
wetting agent; and the component B contains 60-240ml / L of deionized water, 20-75ml / L of binding agent, 8-22ml / L of
thickening agent, 4-8ml / L of
silicon compound and the balance of the
organic solvent. The method for preparing the water base non-chrome
zinc-
aluminium coating comprises the steps of: weighing the lamellar
metal powder proportionally to be mixed uniformly, and then adding the
organic solvent to be mixed uniformly for later use; mixing the
reducing agent with the
wetting agent, adding an appropriate amount of the deionized water to be mixed uniformly, and then adding the lamellar
metal powder liquid to prepare the component A; proportionally weighing the
thickening agent, the binding agent and the
silicon compound, and adding the organic
solvent to be mixed uniformly to prepare the component B; and mixing the prepared component A and the prepared component B according to the ratio of 2:1, and stirring unit uniform, thus obtaining the coating. The method for using the water base non-chrome
zinc-
aluminium coating is that the coating is coated on a part to be treated, and the baking temperature is increased to 360 DEG C so as to solidify and crosslink the coating to form a dense protective layer. The coating has the
corrosion resistance which reaches 840 hours of a neutral
salt spray test and over 96 hours of a
heat resistance test, the usage amount of harmful substances is greatly reduced, and the
working environment is improved.