Abstract： To improve the performance of zinc powders, two kinds of chemical bonding type zinc powders were prepared by using phosphoric acid or triethanolamine as modification agents for the spherical zinc powders. Orthogonal experiments were used to explore the optimal reaction conditions. An immersion test and electrochemical impedance spectroscopy were used to evaluate corrosion resistance of the zinc powders. The results show that after modifying the zinc powders with phosphoric acid or triethanolamine， Zn₃(PO₄)₂·4H₂O and Zn(OH)₂·0.5H₂Ogrow on spherical particles surface in flake and broke forms, respectively. Chemical bonding reactions take place between phosphoric acid or triethanolamine and zinc powders. Anti-corrosion performance of both phosphoric acid and triethanolamine modified bonding type zinc powders is better than that of spherical zinc powders， and anti-corrosion performance of the phosphoric acid modified bonding type zinc powders is better than that of triethanolamine modified bonding type zinc powders.

Keywords: chemical bonding type zinc powder; epoxy zinc-rich coating; corrosion resistance