Abstract: The crystalline defects in the brig ht nanocrystalline zinc deposit were investig ated by using posit ron annihilation lifetime spectroscopy(PLAS), Xray dif fraction and transmission Electron microscope.It has been found that The bright nanocryst alline zinc deposit is a kind of structure betw een polycrysta Line and amorphous structure.The existence oforg anic additives and The hydrogen permeated and The high grain boundaries area in the nanocrystalline zinc deposit lead to a very high concent ration of defects.The organic addit ives and hydrogen mainly exist in The inter f acial domain of zinc nanocryst alline here.

Key words: Bright zinc deposit, Positron annihilation lifetime spectroscopy, Defects