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热浸锌-钛合金镀层钢板的电化学行为

放大字体  缩小字体发布日期:2012-04-18  浏览次数:693

摘要:在纯锌浴中添加钛,制得锌—钛合金镀层含硅钢板。通过塔菲尔极化及电化学阻抗测量,研究了其在w=5%的NaCI水溶液中的腐蚀电化学行为,并与热浸纯锌镀层钢板进行了对比。结果表明,锌—钛合金镀层钢板的极化电阻和交流阻抗增大,腐蚀电流密度减小,耐蚀性能得到提高。

 

关键词:含硅钢;锌—钛合金镀层;热浸镀;耐蚀性;电化学

 

中图分类号:TQl53.2    文献标志码:A

 

文章编号:1004—227X(2009)03—0021一03

 

Electrochemical behavior of hot-dip zinc-tanium alloy galvanized steel sheet//GUI Yan,XU Qia0—yu*

 

AbstractA Zn—-Ti galvanizing coating was prepared on Si-containing low--carbon steel by hot--dip galvanizing in a Zn—Ti bath.The corrosion performance and electrochemical behavior of Zn and Zn-Ti alloy galvanized steel sheets in 5%一(mass fractionl NaCl solution were studied by Tafel polarization and electrochemical impedance spectroscopy fEIS).The results showed that the hot.dip Zn-Ti galvanized steel sheet has higher polarization resistance and electr0. chemical impedance but lower corrosion current density as compared with the hot.dip Zn galvanized one。The corrosion resistance of Zn-Ti galvanized steel sheet was improved.

 

Keywordssilicon..containing low..carbon steel;zinc—— titanium alloy coating;hot-dip galvanizing;corrosion resistance;electrochemistry

 

First-author’s addressPanyu Polytechnic,Guangzhou 51 1483.China

 

前言

 

    热浸锌作为钢铁材料表面防护工艺之一,在交通、建筑、通讯、电力等领域获得了广泛的应用[1-3]。在锌浴中添加合金元素形成的热浸锌合金镀层,具有较好的腐蚀保护作用,常用的有Ni、Mn、Al、Mg等。锌浴中添加各种合金元素以后,主要有以下几方面的作用:(1)利用合金化,使金属表面形成热力学稳定性高的连续保护层,耐蚀性提高;(2)<

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