Exploring the corrosion inhibition of magnesium by coatings Formulated with nano CeO2 and ZnO particles

被引:32
作者
Saravanakumar, T. [1 ]
Kavimani, V. [2 ]
Prakash, K. Soorya [2 ]
Selvaraju, T. [1 ]
机构
[1] Bharathiar Univ, Dept Chem, Coimbatore 641046, Tamil Nadu, India
[2] Anna Univ, Dept Mech Engn, Reg Campus, Coimbatore 641046, Tamil Nadu, India
关键词
CeO2/ZnO composite coating; Doctor blade method; Corrosion resistance; Polarization; CERIUM OXIDE NANOPARTICLE; ZINC-OXIDE; RESISTANCE; BEHAVIOR; PROTECTION; COMPOSITE; PERFORMANCE; CONVERSION; ALLOY;
D O I
10.1016/j.porgcoat.2019.01.006
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
The objective of the work is to identify the anticorrosive property synthesized Nano ZnO rods and CeO2 particles. Both ZnO and CeO2 have good anticorrosion behavior; this materials are tested with and without composition to identify the corrosion inhibition behavior. The result reveals the high protection rate, which was accomplished by the composition. In this research, a detailed investigation of the corrosion inhibition performance of magnesium (Mg) substrate coated nanoparticles like cerium dioxide (CeO2), zinc oxide nanorods (ZnO) and CeO2/ZnO composites were studied. Synthesized nanoparticles were characterized by various physio-chemical techniques. Surface morphology of the developed set of specimens was scrutinized through SEM and EDAX, which established a clean surface coating with minimal defects attainment through doctor's blade method. Electrochemical corrosion behavior of Mg substrates coated with definite proportions of CeO2, ZnO and CeO2/ZnO composites were conceded in 3.5 wt. % NaCl using Tafel polarization and electrochemical impedance spectroscopy. Thus the developed CeO2/ZnO composite coating exhibits i(corr) of 0.905 (A cm(-2)) and corrosion rate was 0.81 x 10(-5) mpy better corrosion resistance compared to bare Mg or CeO2 or ZnO coatings.
引用
收藏
页码:32 / 42
页数:11
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