Degradation Rates of Pure Zinc, Magnesium, and Magnesium Alloys Measured by Volume Loss, Mass Loss, and Hydrogen Evolution
| Autor: | Young-Choon Lee, Lumei Liu, Boyce Collins, Yeoheung Yun, Honglin Zhang, Zhigang Xu, Jagannathan Sankar, Kassu Gebresellasie |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Chemical substance
Materials science Alloy Analytical chemistry chemistry.chemical_element 02 engineering and technology Zinc magnesium engineering.material 010402 general chemistry lcsh:Technology 01 natural sciences Corrosion law.invention lcsh:Chemistry Metal Magazine law volume loss General Materials Science corrosion rate lcsh:QH301-705.5 Instrumentation Fluid Flow and Transfer Processes lcsh:T Magnesium Process Chemistry and Technology zinc General Engineering 021001 nanoscience & nanotechnology mass loss lcsh:QC1-999 0104 chemical sciences Computer Science Applications hydrogen evolution lcsh:Biology (General) lcsh:QD1-999 chemistry lcsh:TA1-2040 visual_art engineering visual_art.visual_art_medium Degradation (geology) lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 8, Iss 9, p 1459 (2018) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app8091459 |
| Popis: | Degradation rate is an important property to evaluate bioabsorbable metallic material; however, values vary depending on the method of measurement. In this study, three different methods of measuring corrosion rate are compared. The degradable samples to analyze corrosion rates include pure magnesium (Mg), lab produced Mg–Zn–Ca alloy (47-7-2), Mg–Zn–Zr–RE (rare earth) alloys (60-13, 60-14), Mg–Zn–Ca–RE alloy (59B), and pure zinc (Zn). A eudiometer was used to measure hydrogen evolution from the reaction of degradable alloys in Hank’s Balanced Salt Solution (HBSS). Corrosion rates based on volume loss of tested alloys in 30 days were calculated using Micro-computed tomography (micro-CT). Final mass change due to corrosion and corrosion removal was measured with a scale. We observed that the corrosion rates indicated by hydrogen evolution were high initially, and slowed down sharply in the following measurements. The corrosion rates of tested alloys calculated by volume loss and mass loss from high to low are: 60–13 ≈ 60–14 ≈ 47–7–2 > 59B > Mg > Zn (p < 0.05). The results provide instruction to experimental methodology to measure corrosion rates of degradable alloys. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|