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热海水中热浸镀用锌及锌铝合金的电化学性能
Electrochemical Properties of Zn/Zn-Al Alloys as Hot-Dip Galvanized Coating Protecting Steel in Hot Seawater
【摘要】 为了定量比较不同热浸镀层用金属(或合金)在热海水中对钢铁基体的阴极保护作用,参照国标GB/T 17848-1999的要求对几种典型的热浸镀用锌及锌铝合金测试了50℃条件下的恒电流性能,计算了电流效率,观察了腐蚀产物脱落情况及腐蚀均匀性,并据此评价了它们的电化学保护性能.结果表明:Zn的电化学性能最好,Zn-55Al-1.6Si合金的电化学性能最差,Zn-5Al-0.1RE,Zn-5Al-0.5Mg,Zn-6Al-3Mg,Zn-11Al-0.2Si-3Mg,Zn-25Al-0.2Si-0.2Mg和Zn-25Al-0.2Si-0.2RE合金介于二者之间.
【Abstract】 To compare quantitatively the cathodic protection effects of Zn and several ZnAl alloys as hot-dip galvanized coating materials on steel in 50?℃ seawater,their electrochemical properties were tested with constant current,according to the(China) national standard GB/T 17848-1999.Their current efficiencies were then calculated with surfaces corrosive peeling and homogeneity observed.Thus,their effects of anti-corrosion protection were evaluated.The results showed that the electrochemical properties of such zinc-aluminum alloys as Zn-5Al-0.1RE,Zn-5Al-0.5Mg,Zn-6Al-3Mg,Zn-11Al-0.2Si-3Mg,Zn-25Al-0.2Si-0.2Mg and Zn-25Al-0.2Si-0.2RE are medium,while Zn is the best and Zn-55Al-1.6Si alloy the poorest one.
【Key words】 hot-dip galvanization； coating； cathodic protection； sacrificial anode； current efficiency； electrochemical property；
- 【文献出处】 东北大学学报 ,JOURNAL OF NORTHEASTERN UNIVERSITY , 编辑部邮箱 ,2005年11期
- 【分类号】TG174.44;
- 【被引频次】10
- 【下载频次】257