The invention discloses a nano composite zincizing ball-milling agent and application thereof. The zincizing agent contains 80%-95% of nano
zinc powder, 2%-10% of an activating agent, 1%-8% of a
diffusion accelerant and 0.5%-5% of an anti-binding agent, wherein the particle size of the nano
zinc powder is 50-100 nm, and the purity of the nano
zinc powder is larger than 99.9%. During application, through mechanical activation and 300-420 DEG C low-temperature thermal
diffusion coupling, zinc atoms and an iron
matrix form a metallurgically bonded zinc-iron
alloy layer. According to the technology, the defects of an existing process are overcome, the
coating is uniform and compact, the
binding force is high, red
rust and
hydrogen embrittlement do not exist in a neutral
salt spray test for more than or equal to 1000 hours, energy is saved, environment friendliness is achieved, the applicability is wide, long-acting anti-
corrosion protection can be provided for materials such as high-strength steel, and green and high-end upgrading of the surface treatment industry is promoted.