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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2022.6
- 수록면
- 1,386 - 1,400 (15page)
- DOI
- 10.1007/s12540-021-01010-w
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초록· 키워드
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Influences of heat-treatment and anodizing procedures on microstructure evolution and corrosion performance of two as-castmagnesium alloys containing different amounts of Ca and rare earth elements and same amounts of Zn were investigated, withthe ultimate goal of developing a new biodegradable metallic implant. The first alloy (hereafter, denoted as F1) had higherRE element content but less calcium than the second one (denoted as F2). The same procedures of solution heat-treatmentand aging were applied to alloys. Microstructures, together with the distribution and composition of secondary phases ofall samples, were investigated by optical microscopy, field emission scanning electron microscopy, and energy-dispersivespectroscopy. Moreover, corrosion properties were evaluated in the phosphate-buffered saline solution using potentiodynamicpolarization and also immersion tests at 37 °C. The results showed that corrosion performance is affected by both chemicalcomposition and heat-treatment procedures. As-cast F2 has the least corrosion rate achieved by the polarization test. However,immersion test results show that solution heat-treated F1 has the lowest corrosion rate among all other specimens, includingpure commercial Mg. In the next step, the anodizing process was performed in 3 current densities on solution heat-treatedF1 alloy, and a 60% reduction in the corrosion rate was observed.
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