Influence of cryogenic treatment on the corrosion of AZ91 and AM60 magnesium alloys in an isotonic solution
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Bassady Gassama
Abstract
Biodegradable stents made of magnesium alloys have become revolutionary in the cardiovascular area. However, rapid corrosion in a body fluid environment is harmful to the mechanical properties and stability. In this study, untreated and cryogenically treated samples of AZ91 and AM60 alloy were employed at −196 °C for 48 h. Afterwards, the corrosion performance of the AZ91 and AM60 samples was tested in an isotonic solution containing 0.9 wt.-% NaCl. Electrochemical methods such as open-circuit potential measurement (OCP), potentiodynamic polarization, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) were used to evaluate the corrosion performance. In general, the results obtained for the electrochemical studies show that the cryogenically treated AZ91 and AM60 samples maintain superior corrosion resistance when compared to the former sample. The OCP results indicated that the cryogenically treated AZ91 and AM60 outperformed untreated samples after 1 h. The potentiodynamic studies confirmed that cryogenically treated AZ91 and AM60 had superior anodic pitting potential (Epit) and that the passivation zone is higher than AZ91 and AM60 when untreated. The EIS confirmed the lower corrosion kinetics for AZ91 and AM60 treated in the former sample.
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© 2019, Carl Hanser Verlag, München
Artikel in diesem Heft
- Inhalt/Contents
- Contents
- Fachbeiträge/Technical Contributions
- Non-destructive testing derived parameters for microstructure-based residual service life assessment of aging metallic materials in nuclear engineering
- Influence of cryogenic treatment on the corrosion of AZ91 and AM60 magnesium alloys in an isotonic solution
- A test method for the determination of the cyclic material properties of electrical steel strip under strain-controlled loading
- Development of a laser-based line scan measurement system for the surface characterization of reinforcing steel
- Inclusion and microstructure characteristics in steel with TiO2 nanoparticle additions
- Mechanical test procedures for the evaluation of hydrogen-assisted damage in high-strength steel
- Effects of particle reinforcement on the bending and compressive behaviors of composite pipes
- Effects of process parameters on the mechanical properties of dissimilar thin Al welds
- Effect of hard chrome plating parameters on the wear resistance of low carbon steel
- The use of color etching to study the microstructure of laser welded steel used in the automotive industry
- Mechanical properties of plain woven kenaf/glass fiber reinforced polypropylene hybrid composites
- Optimization of cryogenic treatment effects on the surface roughness of cutting tools
- Effects of ball burnishing on the surface quality of Al 7075 alloy
- An investigation of the effect of tool approaching angle in turning of CFRP composite materials
Artikel in diesem Heft
- Inhalt/Contents
- Contents
- Fachbeiträge/Technical Contributions
- Non-destructive testing derived parameters for microstructure-based residual service life assessment of aging metallic materials in nuclear engineering
- Influence of cryogenic treatment on the corrosion of AZ91 and AM60 magnesium alloys in an isotonic solution
- A test method for the determination of the cyclic material properties of electrical steel strip under strain-controlled loading
- Development of a laser-based line scan measurement system for the surface characterization of reinforcing steel
- Inclusion and microstructure characteristics in steel with TiO2 nanoparticle additions
- Mechanical test procedures for the evaluation of hydrogen-assisted damage in high-strength steel
- Effects of particle reinforcement on the bending and compressive behaviors of composite pipes
- Effects of process parameters on the mechanical properties of dissimilar thin Al welds
- Effect of hard chrome plating parameters on the wear resistance of low carbon steel
- The use of color etching to study the microstructure of laser welded steel used in the automotive industry
- Mechanical properties of plain woven kenaf/glass fiber reinforced polypropylene hybrid composites
- Optimization of cryogenic treatment effects on the surface roughness of cutting tools
- Effects of ball burnishing on the surface quality of Al 7075 alloy
- An investigation of the effect of tool approaching angle in turning of CFRP composite materials