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Corrosion behavior of pure magnesium processed by accumulative roll bonding for biomaterial application

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Title Corrosion behavior of pure magnesium processed by accumulative roll bonding for biomaterial application
 
Creator Purnamasari, Indah Suis
Rifai, Muhammad
Ajiriyanto, Maman Kartaman
Alhamidi, Ali
Mujamilah
Insani, Andon
Prasetya, Ahadi Damar
 
Subject Magnesium
Accumulative roll bonding
Implant
Heat treatment
Corrosion rate
 
Description 583-590
Magnesium is one of the materials that can be used as an implant for the human body. It is because the daily intake of
magnesium for an adult is 240-420 mg/day. Also, the elastic modulus (41 – 45 GPa) and density (1.74 g/cm3) of magnesium
is closer to that of natural bone. However, pure magnesium in the as-cast condition has a very fast corrosion rate,
2,89mmPY in 0.9% NaCl solution. Accumulative roll bonding (ARB) is done in this recent study to improve the corrosion
rate of pure magnesium. ARB is one of the severe plastic deformations (SPD) method, which provides the possibility to
obtain high strained materials without a macroscopic change after a cyclic roll-bonding process (stacking, preheating and
rolling). Magnesium is annealed at 250°C and 350°C for 25 minutes, and then the ARB process is done with variation; one,
two, three and four cycles. The composition was tested using SEM-EDS, showing that the content of a pure magnesium
plate (as annealed) is 99.77%. The grain size is observed using the optic microscope and measured by ImageJ, while the
corrosion rate was measured with an electrochemical and immersion test. The result showed the smallest grain size achieved
is 7.204 ± 1,185 μm and that the lowest corrosion rate is 0,0012mmPY. The polarization resistance determined the thickness
and the ability of passivation area obtained with the increasing number of ARB cycles. The higher plastic deformation is
recommended for improve the corrosion resistance of the metallic material for future works.
 
Date 2022-03-03T09:43:28Z
2022-03-03T09:43:28Z
2021-12
 
Type Article
 
Identifier 0975-1017 (Online); 0971-4588 (Print)
http://nopr.niscair.res.in/handle/123456789/59269
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJEMS Vol.28(6) [December 2021]