Improved corrosion response of squeeze-cast SiC nanoparticles reinforced AZ91-2.0Ca-0.3Sb alloy

被引：25
作者：
Ganguly, Sourav [1 ]
Mondal, A. K. [2 ]
Sarkar, Smarajit [1 ]
Basu, A. [1 ]
Kumar, S. [3 ]
Blawert, Carsten [4 ]
机构：
[1] Natl Inst Technol, Dept Met & Mat Engn, Rourkela 769008, India
[2] BHU, Dept Met Engn, Indian Inst Technol, Varanasi 221005, Uttar Pradesh, India
[3] Indian Inst Sci, Dept Met Engn, Bangalore 560012, Karnataka, India
[4] Helmholtz Zentrum Geesthacht, Inst Mat Res, Magnesium Innovat Ctr MagIC, Max Planck Str 1, D-21502 Geesthacht, Germany
来源：
CORROSION SCIENCE | 2020年 / 166卷
关键词：
AZ91 magnesium alloy; Nanocomposite; Volta potential; Hydrogen evolution; Potentiodynamic polarization scan; Surface topography; MAGNESIUM ALLOYS; ATMOSPHERIC CORROSION; CARBON NANOTUBES; BEHAVIOR; MICROSTRUCTURE; COMPOSITES; AZ91; NACL; ND;
D O I：
10.1016/j.corsci.2020.108444
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The present work investigates the effect of SiC nanoparticle additions on corrosion response of the squeeze-cast AZ91 + 2.0Ca + 0.3Sb (wt.%) alloy subjected to immersion, hydrogen evolution, and potentiodynamic polarization scan in a 0.1 M NaCl solution. All the AZ91 + 2.0Ca + 0.3Sb + xSiC(np) (x = 0.5, 1.0, 2.0 (wt.%)) nano composites demonstrate a superior corrosion resistance than the alloy, and the nanocomposite reinforced with 2.0SiC(np) exhibits the highest corrosion resistance. The improved corrosion performance of the nanocomposites is attributed to the decrease in the potential difference between alpha-Mg and beta-Mg17Al12 phases, reduced quantity of beta-Mg17Al12 phase, and an increased amount of Al2Ca phase following SiC nanoparticles additions.
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页数：15
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