The Preparation of the Lyophilic Zinc Powder and its Physicochemical Properties

Abstract

Lyophilic zinc powder has been prepared by reacting the zinc powder with n-butanol under the conditions of the high temperature and high pressure. By means of the microanalysis of the surface-treated zinc powder, observation through the electron microscope and dissolution into dil. HCl and also the fact that the surface-treated sample cannot be suspended into water, but into organic solvent, it was found that the only surface property of the powder was changed into the lyophilic, accompanying with no change of any fundamental property of the powder, e. g., surface area, pore structure or any chemical properties. This surface-treatment on the zinc powder was interpreted as the esterification of the acidic group of the surface oxide of the zinc powder with n-butanol. The zinc-rich paint from the surface-treated zinc powder shows the well-dispersed one into vehicle than from the untreated native zinc powder, whilst, the dry film of the paint prepared from the surface-treated zinc powder shows the easily breakable one than from the untreated native ones.