Evaluation of Corrosion Behavior on Crept AlSi10MnMg (AA365) Alloy Produced by High-Pressure Die-Casting (HPDC)
Autor: | Cheolmin Ahn, Eunkyung Lee, Seonghwan Park |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Technology
Materials science QH301-705.5 QC1-999 Alloy microstructure Intermetallic 02 engineering and technology engineering.material 01 natural sciences Corrosion 0103 physical sciences General Materials Science Biology (General) Corrosion current density Corrosion behavior Instrumentation QD1-999 010302 applied physics Fluid Flow and Transfer Processes corrosion Process Chemistry and Technology intermetallic compounds Physics Metallurgy General Engineering temperature 021001 nanoscience & nanotechnology Microstructure Engineering (General). Civil engineering (General) Die casting Computer Science Applications Chemistry High pressure engineering aluminum alloy TA1-2040 0210 nano-technology |
Zdroj: | Applied Sciences, Vol 11, Iss 6227, p 6227 (2021) Applied Sciences Volume 11 Issue 13 |
ISSN: | 2076-3417 |
Popis: | High-pressure die-cast AlSi10MnMg (AA365) alloys have been used as a material for automotive components exposed to high temperature and corrosive environments. This work determines the correlation of corrosion resistance with the intermetallic compounds and micro-voids of crept AA365 alloys under temperatures ranging from 373 K to 573 K with various applied stresses. The results showed that crept AA365 alloy at 473 K possessed a large amount of the intermetallic phases, compared with crept AA365 alloys at 373 K and 573 K due to the non-equilibrium solute atoms in Al matrix. By contrast, crept AA365 alloy at 573 K contained the lowest number of intermetallic precipitates owing to the remelting of the phases. With regard to the corrosion behavior, the corrosion potentials showed −687.0, −684.0, and −673.0 mVSCE of crept AA365 alloys at 373 K, 473 K, and 573 K, respectively, which means the corrosion occurred slowly on the crept AA365 alloy at 573 K, rather than at 373 K, 473 K. The value of the corrosion current density (Icorr) in the crept HPDC AA365 alloy at 473 K has the highest corrosion current density of 13.3 × 10−6 Acm−2, compared with others. It can be inferred that the high amount of intermetallic compounds gave rise to severe corrosion and led to the harmful micro-galvanic corrosion of crept AA365 alloy, rather than the micro-voids. |
Databáze: | OpenAIRE |
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