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電弧噴涂Zn-22Al-Mg-RE合金涂層的耐蝕性能
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國家電網(wǎng)公司科學技術(shù)項目 (2011B-12)


Corrosion Resistance of Zn-22Al-Mg-RE Coating Prepared by Twin Wire Arc Spraying
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    摘要:

    采用電弧噴涂技術(shù)和自主研發(fā)的合金絲材在Q345基體上制備出Zn-22Al-Mg-RE合金涂層。通過SEM、銅加速乙酸鹽霧試驗、XRD和極化曲線來比較純鋅涂層和Zn-22Al-Mg-RE合金涂層的微觀結(jié)構(gòu)及耐蝕性能。結(jié)果表明，Zn-22Al-Mg-RE合金涂層相比于純鋅涂層結(jié)合強度提高了40%，在銅加速乙酸鹽霧試驗中出現(xiàn)第一銹點的時間延長1倍以上。電化學實驗結(jié)果也表明合金涂層具備更優(yōu)異的耐蝕性能。研究認為，Zn-22Al-Mg-RE合金涂層腐蝕產(chǎn)物中出現(xiàn)大量穩(wěn)定致密的Zn6Al2(OH)16CO3·4H2O物相，是耐蝕性能提高的主要原因之一

    Abstract:

    Zn-22Al-Mg-RE alloy coating was prepared on Q345 steel substrate by arc spraying with alloy wires which were researched and designed independently. The microstructure and corrosion resistance of the Zn-22Al-Mg-RE alloy coating were investigated and compared with that of Zn coating by SEM, Copper-accelerated acetic acid salt spray, XRD and Polarization curves. Results show that the bonding strength of Zn-22Al-Mg-RE alloy coating is increased by 40% compared with that of pure zinc coating?, and the first rust appearing time is prolonged by 1 time in Copper-accelerated acetic acid salt spray test. Electrochemical experiment results show that the corrosion resistance of Zn-22Al-Mg-RE alloy coating is superior to that of pure Zn coating. It is indicated that the appearance of much Zn6Al2(OH)16CO3·4H2O which is stable and dense, is one of the main reasons for the enhanced corrosion resistance of the Zn-22Al-Mg-RE alloy coating

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樊志彬,李辛庚,胡新芳,岳增武,王學剛.電弧噴涂Zn-22Al-Mg-RE合金涂層的耐蝕性能[J].稀有金屬材料與工程,2014,43(3):627~630.[Fan Zhibin, Li Xingeng, Hu Xinfang, Yue Zengwu, Wang Xuegang. Corrosion Resistance of Zn-22Al-Mg-RE Coating Prepared by Twin Wire Arc Spraying[J]. Rare Metal Materials and Engineering,2014,43(3):627~630.]
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  • 收稿日期:2013-03-24
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  • 在線發(fā)布日期: 2014-06-27
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