RT Journal Article
T1 In vitro Corrosion-Assisted Cracking of AZ31B Mg Alloy with a Hybrid PEO-MWCNTs/PCL Coating
A1 Daavari, Morteza
A1 Conde, Ana
A1 Atapour, Masoud
A1 HosseinpourRokni, Mohsen
A1 Mora Sánchez, Hugo
A1 Mohedano Sánchez, Marta
A1 Matykina, Endzhe
A1 Arrabal Durán, Raúl
AB The effects of multi-walled carbon nanotubes (MWCNTs) incorporation and polycaprolactone (PCL) post-treatment on the environmental-assisted cracking behaviour of a plasma electrolytic oxidation (PEO) coated AZ31B Mg alloy were elucidated in this study. Slow strain rate tensile (SSRT) experiments were carried out in simulated body fluid (SBF) for the bare material and different coating systems with and without MWCNTs and PCL overlay. Electrochemical impedance spectroscopy (EIS) and microscopic examinations (SEM and optical) were also conducted to reveal the role of corrosion on the mechanical response. In spite of the significant positive influence of the PEO coatings (with and without MWCNTs) on the bio-electrochemical behaviour of the AZ31B alloy, the environmental-assisted cracking performance was only marginally improved. Furthermore, PEO+MWCNTs/PCL coating system increased the fracture strain of the specimens by 7% compared to the un coated specimens. Based on the SEM and optical micrographs, hydrogen embrittlement was suggested as the main cause of failure of the coated specimens under the in vitro slow strain rate test conditions.
PB Elsevier
YR 2023
FD 2023-09-25
LK https://hdl.handle.net/20.500.14352/118074
UL https://hdl.handle.net/20.500.14352/118074
LA eng
NO Morteza Daavari, Ana Conde, Masoud Atapour, Mohsen HosseinpourRokni, Hugo Mora Sánchez, Marta Mohedano, Endzhe Matykina, Raul Arrabal, In vitro corrosion-assisted cracking of AZ31B Mg alloy with a hybrid PEO+MWCNTs/PCL coating, Surfaces and Interfaces, Volume 42, Part B, 2023, 103446, ISSN 2468-0230, https://doi.org/10.1016/j.surfin.2023.103446.
NO Agencia Estatal de Investigación
NO Ministerio de Ciencia, Innovación y Universidades
NO University of Larestan
NO FEDER, UE
NO Comunidad de Madrid
DS Docta Complutense
RD 17 abr 2025