Al-Mg-Zn合金自腐蚀电位-成分三元图的建立及牺牲阳极保护试验
Establishment of Electrode Potential-composition Plot of Al-Mg-Zn Alloys and Sacrificial Anode Protection Tests
摘 要
设计了系列成分的Al-Mg-Zn三元合金, 采用大气造渣保护熔炼技术制备了Al-Mg-Zn合金铸锭, 进行了电化学性能测试和阳极保护试验, 建立了Al-Mg-Zn三元合金自腐蚀电位-成分图。发现AlxMgyZn1-x-y合金当x=0.2～0.6, y=0～0.4时, 具有较低的自腐蚀电位和自腐蚀电流密度, 分别为-1.03～-1.25 V(vs.SCE)和8.7×10-7～5.01×10-5 A/cm2; 同时, Al0.2Mg0. 2Zn0.6和Al0.6Mg0. 2Zn0.2合金在3.5% NaCl溶液中对Q235钢具有良好的保护作用。
自腐蚀电位-成分图
牺牲阳极
保护效果
Al-Mg-Zn alloy
electrode potential-component plot
sacrificial anode
protective effect
Abstract
A series of Al-Mg-Zn alloys were prepared by flux melting in the atmosphere. The as-prepared alloys were investigated by electrochemical performance testing and anodic protection experiment. Al-Mg-Zn electrode potential-component ternary plot was established. The results show that when x and y were equal to 0.2～0.6 and 0～0.4 respectively, the corrosion current density and free corrosion potential of alloys were very low, Ecorr was between -1.03 V and -1.25 V(vs.SCE), Jcorr was between 8.7×10-7 A/cm2 and 5.01×10-5 A/cm2. At the same time, Al0.2Mg0.2Zn0.6 and Al0.6Mg0.2Zn0.2 alloys had a good protective effect for Q235 steel in the solution of 3.5% NaCl.
中图分类号 TG174
所属栏目 试验研究
基金项目 国家自然科学青年基金(No. 51001083); 湖北省教育厅青年人才项目(No. Q20081104)
收稿日期 2011/10/8
修改稿日期
网络出版日期
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备注甘章华,副教授,博士,
引用该论文: CHEN Han-jie,GAN Zhang-hua,XU Li-ming,CHEN Yi-ming,ZHOU Huan-hua. Establishment of Electrode Potential-composition Plot of Al-Mg-Zn Alloys and Sacrificial Anode Protection Tests[J]. Corrosion & Protection, 2012, 33(9): 733
被引情况:
【1】马天凤,李泽,程艳艳, "镁合金焊点表面化学镀镍磷膜层分析",腐蚀与防护 37, 43-46(2016)
【2】马天凤,李泽,程艳艳, "镁合金点焊接头组织的耐蚀性",腐蚀与防护 36, 640-642(2015)
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【3】Shibli S M A,Jabeera B,Manu R. Development of high performance aluminum alloy sacrificial anodes reinforced with metal oxides[J]. Materials Letters,2007,61:3000-3004.
【4】Rousseau C,Baraud F,Leleyter L,et al. Cathodic protection by zinc sacrificial anodes:Impact on marine sediment metallic contamination[J]. Journal of Hazardous Materials,2009,167:953-958.
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【8】左列. 大功率动力电池用铝合金阳极材料研究[D]. 长沙: 中南大学硕士学位论文, 2009.
【9】齐公台,郭稚弧,林汉同. 腐蚀保护常用的几种牺牲阳极材料[J]. 材料开发与应用,2001,16(1):36-40.
【10】毕毕柯夫, 留布林斯基, 波瓦罗娃. 海船电化学保护[M]. 北京:国防工业出版社, 1975.
【11】潘应君,张恒,黄宁,等. 热喷涂Zn-15% Al合金的耐蚀性研究[J]. 腐蚀与防护,2002,23(12):526-528.
【12】潘应君,张恒,黄宁,等. Zn-Al合金在长江水中的耐蚀性研究[J]. 腐蚀科学与防护技术,2003,15(4):231-233.
【13】从善海,侯强. 环氧富Zn-Al-Mg-Ce合金涂层耐腐蚀性能[J]. 中国表面工程,2010,23(1):57-62.
【14】Udhayan R,Devendra Prakash Bhatt. On the corrosion behaviour of magnesium and its alloys using electrochemical techniques[J]. Journal of Power Sources,1996,63(1):103-107.
【15】Waheed A Badawya,Nadia H Hilal. Electrochemical behavior of Mg and some Mg alloys in aqueous solutions of different pH[J]. Electrochimica Acta,2010,55(6):1880-1887.
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