Corrosion behavior of Zn-Cu-Ti and Zn-Cu-Ti-Mg alloys in NaCl solution

被引：13
|
作者：
Wang, Y. H. [1 ]
Xiao, L. R. [1 ,2 ]
Zhao, X. J. [1 ]
Zhang, W. [1 ]
Song, Y. F. [1 ]
Guo, L. [1 ]
Wang, Y. [1 ]
机构：
[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
[2] Cent S Univ, Minist Educ, Key Lab Nonferrous Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2016年 / 67卷 / 03期
关键词：
MODEL ATMOSPHERIC CONDITIONS; ROLLED ZINC; AL; INHIBITION; COATINGS; MICROSTRUCTURE; RESISTANCE; ELEMENTS;
D O I：
10.1002/maco.201508410
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present investigation the microstructure and corrosion behavior of Zn-Cu-Ti and Zn-Cu-Ti-Mg alloys in 3.5wt% NaCl solution were studied through scanning electron microscope, electron probe microanalysis, X-ray diffraction, polarization measurements and immersion tests. The Zn-Cu-Ti exhibited eutectic structure with rod-shaped TiZn15 phase, while the Zn-Cu-Ti-Mg mainly consisted of Zn matrix, TiZn15, tau(2)-Cu2TiZn22 ternary phase and Zn-Mg intermetallics along the grain boundaries. It was observed that in the corrosion products of both Zn-Cu-Ti and Zn-Cu-Ti-Mg alloys, the main phases were ZnO and Zn-5(OH)(8)Cl-2 center dot H2O. The corrosion tests showed that the cathodic process was suppressed and the weight gain decreased for Zn-Cu-Ti-Mg alloy in 3.5wt% NaCl solution. The better corrosion properties of Zn-Cu-Ti-Mg was owed to the formation of a more compact and protective corrosion layer arising from the increased intensity of Zn-5(OH)(8)Cl-2 center dot H2O.
引用
收藏
页码：297 / 304
页数：8
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