Scratch and wear resistance of nano-silica-modified silicate conversion coating on aluminium

被引：7
作者：
Bahri, H. [1 ]
Danaee, I. [1 ]
Rashed, G. R. [1 ]
Dabiri, A. R. [1 ]
机构：
[1] Petr Univ Technol, Abadan Fac Petr Engn, Abadan, Iran
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2016年 / 32卷 / 13期
关键词：
AA2024; Silicate coatings; Nano-silica; Scratch hardness; Wear; Cross-cut test; DIP GALVANIZED STEELS; SOL-GEL COATINGS; CORROSION BEHAVIOR; HYBRID COATINGS; ALLOY; 2024; PROTECTION; DEPOSITION; METALS; AA2024;
D O I：
10.1080/02670836.2015.1124192
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The silicate conversion coating was modified with nano-silica and applied on the surface of AA2024 by dip-coating technique. The mechanical properties of produced modified silicate layer were investigated by the pencil scratch hardness, cross-cut and abrasion resistance tests. The characterisation of coated surface before and after the tests was studied with optical microscopy, scanning electron microscopy, energy-dispersive spectroscopy and atomic force microscopy. Addition of nano-silica to the silicate coating caused an enhancement in the SiO2: K2O ratio. The results showed that the homogeneity of coating surfaces increased in the presence of nano-silica. The wear and scratch resistance of the modified silicate layer improved against the sliding conditions. In addition, the adhesion of coating layer to the substrate metal increased.
引用
收藏
页码：1346 / 1353
页数：8
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