杂质对热镀锌层抗腐蚀性能的影响_李广龄.pdf

　25　　4 　　　　　　 1999 8 　Vol.25　　 No.4 Steel Wire Products August 1999　 李广龄 (　315209) 　　　　, 、, , , 。 　　　 Effects of Impurity on Corrosion Resistance of the Coat of Galvanizing by Dipping Li Guangling (N ingbo F ishing Wire Rop e F actory 　315209) Abstract　To analyze the effectsof some impurity such as Fe, Pb etc.on corrosion resistance of the coat of galvanizing by dipping from the fundamentals of electrochemical corrosion.It is indicated that some measuresmust be adopted in steel ire galvanizing by dipping production to control impurity content and improve the corrsion resistance of coat. Keywords　galvanizing by dipping;　electrochemical corrosion;　impurity 　　、, 、 [1] 。、 ,、 。 、。 [2] Pb-Zn,Fe-Zn 。,, ,450 ℃, ;、 1.5%,0.03%, ,、。 , , , [3] 。 ,420 ℃, “”,, ()1.3%, () ,、 98.0%;, 。 , FeZn , , 7 。 。Fe、Pb Al 。 1　、 、、 　 。、, , 1 ,,1(GB/T 470-1997)。 pH 。 1 , pH 1　 % 6 ～12.5 , Zn Pb Cd Fe Cu , , pH 6 Zn 12.5 ,, 。 99.995 99.995 0.003 0.002 0.001 0.001