共 74 条
Effect of Microstructure on Corrosion Behavior of Cold Sprayed Aluminum Alloy 5083
被引:4
作者:
Kim, Munsu
[1
]
Perez-Andrade, Lorena
[1
]
Brewer, Luke N.
[1
]
Kubacki, Gregory W.
[1
]
机构:
[1] Univ Alabama, Dept Met & Mat Engn, Tuscaloosa, AL 35487 USA
关键词:
Al-Mg alloys;
additive manufacturing;
cold spray deposition;
localized corrosion;
sensitization;
ASTM G67;
MICRO-GALVANIC CORROSION;
AL-MG ALLOYS;
INTERGRANULAR CORROSION;
NUMERICAL-SIMULATION;
PITTING CORROSION;
NANOCRYSTALLINE;
SENSITIZATION;
PARTICLES;
COATINGS;
REPAIR;
D O I:
10.3390/cmd5010002
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
This paper investigates the effect of the microstructure on the corrosion behavior of cold sprayed (CS) AA5083 compared to its wrought counterpart. It has been shown that the microstructure of CS aluminum alloys, such as AA2024, AA6061, and AA7075, affects their corrosion behavior; however, investigations of the corrosion behavior of CS AA5083 with a direct comparison to wrought AA5083 have been limited. The microstructure and corrosion behavior of CS AA5083 were examined by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), electron backscattered diffraction (EBSD), electrochemical and immersion tests, and ASTM G67. The CS process resulted in microstructural changes, such as the size and spatial distribution of intermetallic particles, grain size, and misorientation. The refined grain size and intermetallic particles along prior particle boundaries stimulated the initiation and propagation of localized corrosion. Electrochemical tests presented enhanced anodic kinetics with high pitting susceptibility, giving rise to extensive localized corrosion in CS AA5083. The ASTM G67 test demonstrated significantly higher mass loss for CS AA5083 compared to its wrought counterpart due to preferential attack within prior particle boundary regions in the CS microstructure. Possible mechanisms of intergranular corrosion (IGC) propagation at prior particle boundary regions have been discussed.
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页码:27 / 51
页数:25
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