The effect of surface pre-treatments on corrosion behavior of cerium-based conversion coatings on Al 7075-T6

被引：23
|
作者：
Danaee, I. [1 ]
Zamanizadeh, H. R. [1 ]
Fallahi, M. [1 ]
Lotfi, B. [2 ]
机构：
[1] Petr Univ Technol, Abadan Fac Petr Engn, Abadan, Iran
[2] Shahid Chamran Univ, Dept Mat Sci & Engn, Ahvaz, Iran
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2014年 / 65卷 / 08期
关键词：
ALUMINUM; OXIDE; DEPOSITION; RESISTANCE; 2024-T3; NUCLEATION; INHIBITION; PARAMETERS; LAYERS;
D O I：
10.1002/maco.201307147
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cerium-based conversion coatings were deposited on Al 7075-T6 and characterized to determine the effect of different surface pre-treatments on the corrosion rate and surface morphology. The methods of potentiodynamic polarization and scanning electron microscopy were employed. The experimental results suggest that cerium-based conversion coating is corrosion resistant in NaCl solution. Corrosion current decreased with alkaline cleaning and acid activation of aluminum surface before cerium oxide deposition. Alkaline cleaning and activation improved deposition of cerium-based conversion coatings compared to only alkaline cleaning. Analysis of the surface morphology of the coatings showed that the coatings deposited on the alkaline cleaning and acid treated panels exhibited lower visible cracks compared to coatings on only alkaline cleaned panels.
引用
收藏
页码：815 / 819
页数：5
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