Influence of Fe(II) and Fe(III) on the formation, structure and molecular adsorption properties of zinc hydroxysulfate rusts

摘要

To simulate the corrosion of galvanized steel, artificial zinc rust of zinc hydroxysulfate (Zn_4(SO_4)(0H)_6n-H_2O:ZHSnH_2O) was prepared in the presence of Fe(ll) and Fe(lll) at 85℃. Adding Fe(ll) and Fe(III) suppressed the crystallization, particle growth and adsorption of corrosive gasses such as CO_2 and SO_2 on ZHSnH_2O. The effect of Fe(III) was much higher than that of Fe(II). On increasing Fe(III) added, the crystal structure turned following as ZHSnH_2O→ a mixture of ZHS nH_2O and a-FeOOH→α-FeOOH and altered the particle morphology from hexagonal plate to needle-like nanoparticles.