RT Journal Article
T1 AlSiC thermal spray coatings for corrosion protection of Mg–Al alloys in humid and saline environments
A1 Arrabal Durán, Raúl
A1 Pardo Gutiérrez Del Cid, Ángel
A1 Merino Casals, María Concepción
A1 Mohedano Sánchez, Marta
A1 Casajús, P.
A1 Merino, S.
AB The corrosion behaviour of thermal spray Al/SiC coatings deposited on AZ31, AZ80 and AZ91D Mg–Al–Zn alloys was evaluated in neutral salt fog (ASTM B 117) and high relative humidity (98% RH, 50 °C) environments. The findings revealed porous as-sprayed coatings with paths providing access of the corrosive media to the magnesium substrates. This resulted in galvanic corrosion at the substrate/coating interfaces and formation of magnesium corrosion products, which eventually led to coating spalling in the case of salt fog tests after protracted times of exposure. The application of a cold-pressing post-treatment improved the corrosion performance of the coatings. Thus, in high humidity atmosphere, corrosion signs were only visible at the Al/SiC interfaces in the outermost surface of the coatings and, in salt fog environment, the galvanic corrosion of the substrates was delayed.
PB Elsevier
SN 0257-8972
YR 2010
FD 2010-05-15
LK https://hdl.handle.net/20.500.14352/107712
UL https://hdl.handle.net/20.500.14352/107712
LA eng
NO (1) Arrabal, R.; Pardo, A.; Merino, M. C.; Mohedano, M.; Casajús, P.; Merino, S. Al/SiC Thermal Spray Coatings for Corrosion Protection of Mg–Al Alloys in Humid and Saline Environments. Surface and Coatings Technology 2010, 204 (16), 2767–2774. https://doi.org/10.1016/j.surfcoat.2010.02.030.
DS Docta Complutense
RD 6 oct 2024