Sebastian feliu batlle

Dr. Feliu Jr. graduated with Honors in the specialty of Metallurgy at the Faculty of Chemistry of the Complutense University of Madrid in 1987. He took a particular interest in the field of corrosion, largely due to interesting and fruitful conversations with Prof. S. Feliu, my father. In 1988, he was awarded with a Ph.D. scholarship funded by the Spanish National Research Council (CSIC). In 1990, he completed his Doctoral Thesis under the direction of Professors Manuel Morcillo and Jose Maria Bastidas in the Department of Corrosion at CENIM. His PhD was primarily focus on the use of impedance measurements to obtain information about the effect of replacement of part of the zinc by Fe2P extender on the anti-corrosive properties of zinc-rich coatings. Following his PhD, Feliu Jr joined the group of Prof. James Castle at the Surrey University, England, in 1991, as an Honorary Research Fellow, where he used X-ray photoelectron spectroscopy (XPS) to examine ...(

EDUCATION

PhD in Chemistry U. Complutense (Madrid) 1990
Degree in Chemistry U. Complutense (Madrid) 1990

RESEARCH, TEACHING, or OTHER INTERESTS

Metals and Alloys, Surfaces, Coatings and Films, Materials Chemistry, Materials Science

FUTURE PROJECTS

Scopus Publications

Effect of temperature on the corrosion behavior of biodegradable AZ31B magnesium alloy in ringer’s physiological solution
Sebastian Feliu, Lucien Veleva, and Federico García-Galvan
MDPI AG
In this work, the corrosion behaviors of the AZ31B alloy in Ringer’s solution at 20 °C and 37 °C were compared over four days to better understand the influence of temperature and immersion time on corrosion rate. The corrosion products on the surfaces of the AZ31B alloys were examined by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Electrochemical impedance spectroscopy (EIS) provided information about the protective properties of the corrosion layers. A significant acceleration in corrosion rate with increasing temperature was measured using mass loss and evolved hydrogen methods. This temperature effect was directly related to the changes in chemical composition and thickness of the Al-rich corrosion layer formed on the surface of the AZ31B alloy. At 20 °C, the presence of a thick (micrometer scale) Al-rich corrosion layer on the surface reduced the corrosion rate in Ringer’s solution over time. At 37 °C, the incorporation of additional Mg and Al compounds containing Cl into the Al-rich corrosion layer was observed in the early stages of exposure to Ringer’s solution. At 37 °C, a significant decrease in the thickness of this corrosion layer was noted after four days.


Initial stages of AZ31B magnesium alloy degradation in ringer’s solution: Interpretation of EIS, mass loss, hydrogen evolution data and scanning electron microscopy observations
Lucien Veleva, Mareny Guadalupe Fernández-Olaya, and Sebastián Feliu
MDPI AG
The initial stages of corrosion of AZ31B magnesium alloy, immersed in Ringer′s solution at 37 °C body temperature for four days, have been evaluated by independent gravimetric and chemical methods and through electrochemical impedance spectroscopy (EIS) measurements. The corrosion current densities estimated by hydrogen evolution are in good agreement with the time-integrated reciprocal charge transfer resistance values estimated by EIS. The change in the inductive behavior has been correlated with difference in the chemical composition of corrosion layers. At the shorter immersion of 2 days, EDS analysis of cross section of the uniform corrosion layer detected Cl and Al elements, perhaps as formed aluminum oxychlorides salts.


Influence of aluminium enrichment in the near-surface region of commercial twin-roll cast AZ31 alloys on their corrosion behaviour
M.C. Delgado, F.R. García-Galvan, I. Llorente, P. Pérez, P. Adeva, and S. Feliu
Elsevier BV



Influence of hydrogen bubbles adhering to the exposed surface on the corrosion rate of magnesium alloys AZ31 and AZ61 in sodium chloride solution
S. Feliu, F. R. García‐Galvan, I. Llorente, L. Diaz, and J. Simancas
Wiley
The influence of the presence of hydrogen bubbles adhered to the corroding specimen surface on the EIS estimations of corrosion rate of magnesium alloys is considered. The EIS corrosion rates for AZ31 specimens exposing a small area were four times higher than the real values determined by gravimetric or hydrogen evolution measurements. In contrast, no significant differences in the corrosion rate have been observed in the case of the AZ61 specimens. A progressive deterioration in the protective properties of the corrosion products layer formed during the test was observed only on AZ31 specimens exposing a small area.


Corrosion product layers on magnesium alloys AZ31 and AZ61: Surface chemistry and protective ability
S. Feliu and I. Llorente
Elsevier BV



Effect of heat treatment of magnesium alloy substrates on corrosion resistance of a hybrid organic-inorganic sol-gel film
L. Diaz, F. R. García-Galván, I. Llorente, A. Jiménez-Morales, J. C. Galván, and S. Feliu Jr
Royal Society of Chemistry (RSC)
The influence of heat treatment of magnesium alloy substrates on corrosion resistance of a sol–gel coating has been assessed during immersion tests in 0.6 M NaCl aqueous solution.


A study on the relationships between corrosion properties and chemistry of thermally oxidised surface films formed on polished commercial magnesium alloys AZ31 and AZ61
Sebastián Feliu, Alejandro Samaniego, Violeta Barranco, A.A. El-Hadad, Irene Llorente, Carmen Serra, and J.C. Galván
Elsevier BV



Exploring the possibility of protective surface oxides upon Mg alloy AZ31 via lutetium additions
A. Samaniego, K. Gusieva, I. Llorente, S. Feliu, and N. Birbilis
Elsevier BV



Influence of substrate composition on corrosion protection of sol-gel thin films on magnesium alloys in 0.6 M NaCl aqueous solution
A.A. El-Hadad, V. Barranco, A. Samaniego, I. Llorente, F.R. García-Galván, A. Jiménez-Morales, J.C. Galván, and S. Feliu
Elsevier BV



Effect of native oxide film on commercial magnesium alloys substrates and carbonate conversion coating growth and corrosion resistance
Sebastián Feliu, Jr., Alejandro Samaniego, Elkin Bermudez, Amir El-Hadad, Irene Llorente, and Juan Galván
MDPI AG
Possible relations between the native oxide film formed spontaneously on the AZ31 and AZ61 magnesium alloy substrates with different surface finish, the chemistry of the outer surface of the conversion coatings that grows after their subsequent immersion on saturated aqueous NaHCO3 solution treatment and the enhancement of corrosion resistance have been studied. The significant increase in the amount of aluminum and carbonate compounds on the surface of the conversion coating formed on the AZ61 substrate in polished condition seems to improve the corrosion resistance in low chloride ion concentration solutions. In contrast, the conversion coatings formed on the AZ31 substrates in polished condition has little effect on their protective properties compared to the respective as-received surface.


The effect of low temperature heat treatment on surface chemistry and corrosion resistance of commercial magnesium alloys AZ31 and AZ61 in 0.6M NaCl solution
Sebastián Feliu, Alejandro Samaniego, Violeta Barranco, A.A. El-Hadad, Irene Llorente, and P. Adeva
Elsevier BV



Combined effect of composition and surface condition on corrosion behaviour of magnesium alloys AZ31 and AZ61
Alejandro Samaniego, Irene Llorente, and Sebastián Feliu
Elsevier BV



The effect of NaHCO<inf>3</inf> treatment time on the corrosion resistance of commercial magnesium alloys AZ31 and AZ61 in 0.6M NaCl solution
Sebastián Feliu, Alejandro Samaniego, A.A. El-Hadad, and Irene Llorente
Elsevier BV



Electrochemical corrosion behaviour of Mg-Al alloys with thermal spray Al/SiCp composite coatings
A. Pardo, S. Feliu, M. C. Merino, M. Mohedano, P. Casajús, and R. Arrabal
Informa UK Limited
The corrosion protection of Mg–Al alloys by flame thermal spraying of Al/SiC particles (SiCp) composite coatings was evaluated by electrochemical impedance spectroscopy in 3.5 wt.% NaCl solution. The volume fraction of SiCp varied between 5 and 30%. The as-sprayed Al/SiCp composite coatings revealed a high number of microchannels, largely in the vicinity of the SiCp, that facilitated the penetration of the electrolyte and the subsequent galvanic corrosion of the magnesium substrates. The application of a cold-pressing post-treatment reduced the degree of porosity of the coatings and improved the bonding at the coating/substrate and Al/SiC interfaces. This resulted in improved corrosion resistance of the coated specimens. The effectiveness of the coatings slightly decreased with the addition of 5–30 vol.% SiCp compared with the unreinforced thermal spray aluminium coatings.


Effect of the chemistry and structure of the native oxide surface film on the corrosion properties of commercial AZ31 and AZ61 alloys
Sebastián Feliu, C. Maffiotte, A. Samaniego, Juan Carlos Galván, and Violeta Barranco
Elsevier BV



Atmospheric corrosion of magnesium alloys AZ31 and AZ61 under continuous condensation conditions
Sebastián Feliu, C. Maffiotte, Juan Carlos Galván, and Violeta Barranco
Elsevier BV



Effect of naturally formed oxide films and other variables in the early stages of Mg-alloy corrosion in NaCl solution
Sebastián Feliu, C. Maffiotte, Alejandro Samaniego, Juan Carlos Galván, and Violeta Barranco
Elsevier BV



Estimation of the corrosion rate in circumstances of difficult implementation of the common methods for electrochemical measurements




Corrosion behavior of AZ magnesium alloys with Al and Al-11 Si thermal spray coatings
A. Pardo, M.C. Merino, R. Arrabal, P. Casajús, M. Mohedano, S. Feliú, and S. Merino
Association for Materials Protection and Performance (AMPP)
Abstract The corrosion behavior of AZ31, AZ80, and AZ91D Mg-Al-Zn alloys coated with aluminum and Al-11Si thermal spray was evaluated in 3.5 wt% sodium chloride (NaCl) solution at 22°C by gravimetric and electrochemical impedance spectroscopy (EIS) measurements. The corrosion products were examined using scanning electron microscopy (SEM), energy-dispersive x-ray analysis (EDX), and low-angle x-ray diffraction (XRD). The as-sprayed aluminum and Al-11Si coatings were porous, and galvanic corrosion of magnesium substrates was observed at the substrate/coating interfaces. Application of a cold-pressing posttreatment smoothed and densified the coatings, improved the contact between coating and substrate, and substantially increased the corrosion resistance. Cold-pressed aluminum coatings were an effective barrier against corrosion and revealed the same corrosion performance, regardless of the composition of the magnesium substrate. However, cold-pressed Al-11Si coatings were permeable to the chloride-containi...


Electrochemical estimation of the corrosion rate of magnesium/aluminium alloys
A. Pardo, S. Feliu, M. C. Merino, R. Arrabal, and E. Matykina
Hindawi Limited
The corrosion rate of AZ31, AZ80, and AZ91D magnesium/aluminium alloys immersed in 3.5 wt.% NaCl was determined comparing gravimetric and electrochemical measurements. The findings revealed that, for all investigated materials, a fraction of the metallic surface exposed to the corrosive medium did not reveal a normal electrochemical response to the applied signal. This may be associated with phenomena such as partial disintegration of specimens into fine metallic particles, electrochemical formation of ions, and/or anomalous chemical attack occurring simultaneously with the normal electrochemical corrosion attack. The abnormal electrochemical behaviour was more evident for lower amounts of aluminium in the bulk composition of the investigated materials. Thus, the electrochemical estimates of pure Mg and the AZ31 alloy were not reliable and tended to underestimate corrosion losses.


Electrochemical corrosion behaviour of Mg-Al alloys with thermal spray Al/SiCp composite coatings
A. Pardo, S. Feliu Jr, M. C. Merino, M. Mohedano, P. Casajús, and R. Arrabal
Editorial CSIC
The corrosion protection of Mg-Al alloys by flame thermal spraying of Al/SiCp composite coatings was evaluated by electrochemical impedance spectroscopy in 3.5 wt.% NaCl solution. The volume fraction of SiC particles (SiCp) varied between 5 and 30%. The as-sprayed Al/SiCp composite coatings revealed a high number of micro-channels, largely in the vicinity of the SiC particles, that facilitated the penetration of the electrolyte and the subsequent galvanic corrosion of the magnesium substrates. The application of a cold-pressing post-treatment reduced the degree of porosity of the coatings and improved the bonding at the coating/substrate and Al/SiC interfaces. This resulted in improved corrosion resistance of the coated specimens. The effectiveness of the coatings slightly decreased with the addition of 5-30 vol.% SiCp compared with the unreinforced thermal spray aluminium coatings.


Estimation of the corrosion rate in circumstances of difficult implementation of the common methods for electrochemical measurements




Correlation between the surface chemistry and the atmospheric corrosion of AZ31, AZ80 and AZ91D magnesium alloys
S. Feliu, A. Pardo, M.C. Merino, A.E. Coy, F. Viejo, and R. Arrabal
Elsevier BV



XPS study of chemical changes on the La/Ce treated surface of A361 aluminium alloy exposed to air at temperatures up to 500 °c
A. Pardo, S. Feliú, M. C. Merino, R. Arrabal, and E. Matykina
Hindawi Limited
The chemical changes that take place on the rare earth treated surface of the A361 aluminium alloy exposed to air at temperatures between 100 and500∘Chave been examined using X-ray photoelectron spectroscopy (XPS). The most notable features discussed in this work are the disappearance of Mg and Si signals at the tested temperatures and disappearance of the Ce signal at temperatures of 400–500∘C. The biphasic microstructure of the A361 alloy, constituted by close to 12 wt% Si and the Al matrix, plays an important role in many of the results obtained. The notable growth of aluminium oxide across the conversion coating in the case of the Ce-treated surface is related to the structural transformation experienced by the cerium oxide coating at 400–500∘C.


Cerium doped hybrid silica sol-gel coatings with selfhealing properties for corrosion protection of mild steel

RECENT SCHOLAR PUBLICATIONS

Corrosion Behavior of Additively Manufactured AZ91 Mg Alloy
R Reyes, FR Garcia-Galvan, JA Jimnez, S Feliu Jr, V Barranco, ...
Electrochemical Society Meeting Abstracts prime2024, 1638-1638 2024



Development of Green Conversion Sol-Gel Coatings for Corrosion Protection of AZ61 Magnesium Alloy
FR Garcia-Galvan, A Pez-Pavn, V Barranco, I Llorente, ...
Electrochemical Society Meeting Abstracts prime2024, 1571-1571 2024



The application of electrochemical impedance spectroscopy to study the corrosion of magnesium alloys
S Feliu Jr, JC Galvn Sierra
Elsevier 2024



(Invited) Multiscale Electrochemical Analysis of Sol-Gel Films Modified with Eco-Friendly Corrosion Inhibitors for Active Corrosion Protection of AZ61 Magnesium
FR Garcia-Galvan, J Martn Cordn, N Carmona, I Llorente, S Fajardo, ...
Electrochemical Society Meeting Abstracts 244, 1121-1121 2023



Corrosion Activity of Stainless Steel SS430 and Carbon Steel B450C in a Sodium Silicate Modified Limestone-Portland Cement Extract
D Bonfil, L Veleva, S Feliu Jr, JI Escalante-Garca
Materials 16 (14), 5066 2023



Combined effect of the exposure angle and face orientation on the atmospheric corrosion behavior of low carbon steel
JE Rodrguez-Yez, SF Batlle, J Sanabria-Chinchilla, JF Rojas-Marn
Electrochimica Acta 439, 141567 2023



Corrosion Activity of Carbon Steel B450C and Stainless Steel SS430 Exposed to Extract Solution of a Supersulfated Cement
D Bonfil, L Veleva, S Feliu Jr, JI Escalante-Garca
Materials 15 (24), 8782 2022



Corrosion resistance of pulsed laser modified AZ31 Mg alloy surfaces
S Fajardo, L Migulez, MA Arenas, J de Damborenea, I Llorente, S Feliu
Journal of Magnesium and Alloys 10 (3), 756-768 2022



Corrosion activity of carbon steel B450C and low chromium ferritic stainless steel 430 in chloride-containing cement extract solution
L Veleva, D Bonfil, A Bacelis, S Feliu Jr, M Cabrini, S Lorenzi
Metals 12 (1), 150 2022



Mg-Ca0. 3 Electrochemical Activity Exposed to Hank’s Physiological Solution and Properties of Ag-Nano-Particles Deposits
JL Gonzlez-Murgua, L Veleva, G Rodrguez-Gattorno, ...
Metals 11 (9), 1357 2021



Corrosion behavior of extruded AM60-AlN metal matrix nanocomposite and AM60 alloy exposed to simulated acid rain environment
L Chvez, L Veleva, S Feliu Jr, D Giannopoulou, H Dieringa
Metals 11 (6), 990 2021



Corrosion activity of carbon steel B450C and low chromium ferritic stainless steel 430 in cement extract solution
Bacelis, L Veleva, S Feliu Jr, M Cabrini, S Lorenzi
Buildings 11 (6), 220 2021



Experimental apparent stern–geary coefficients for AZ31B Mg alloy in physiological body fluids for accurate corrosion rate determination
FR Garca-Galvan, S Fajardo, V Barranco, S Feliu Jr
Metals 11 (3), 391 2021



Electrochemical impedance spectroscopy for the measurement of the corrosion rate of magnesium alloys: Brief review and challenges
S Feliu Jr
Metals 10 (6), 775 2020



Localised Electrochemical Techniques for Studying Corrosion of Mg and Mg Alloys/coating systems: Opportunities and Challenges
V Barranco, F Garca Galvn, S Fajardo, S Feli Jr, JC Galvn Sierra
2019



Composition, Structure, and Protective Properties of Air-Formed Oxide Films on Magnesium Alloys
S Feliu Jr
Magnesium and Its Alloys, 263-287 2019



Effect of temperature on the corrosion behavior of biodegradable AZ31B magnesium alloy in ringer’s physiological solution
S Feliu Jr, L Veleva, F Garca-Galvan
Metals 9 (5), 591 2019



Initial stages of AZ31B magnesium alloy degradation in ringer’s solution: Interpretation of EIS, mass loss, hydrogen evolution data and scanning electron microscopy observations
L Veleva, MG Fernndez-Olaya, S Feliu Jr
Metals 8 (11), 933 2018



A critical review of the application of electrochemical techniques for studying corrosion of Mg and Mg alloys: opportunities and challenges
S Fajardo, FR Garca-Galvan, V Barranco, JC Galvan, SF Batlle
Magnesium alloys-selected issue 16 2018



Influence of aluminium enrichment in the near-surface region of commercial twin-roll cast AZ31 alloys on their corrosion behaviour
MC Delgado, FR Garca-Galvan, I Llorente, P Prez, P Adeva, S Feliu Jr
Corrosion Science 123, 182-196 2017

MOST CITED SCHOLAR PUBLICATIONS

Influence of microstructure and composition on the corrosion behaviour of Mg/Al alloys in chloride media
A Pardo, MC Merino, AE Coy, F Viejo, R Arrabal, S Feli Jr
Electrochimica Acta 53 (27), 7890-7902 2008
Citations: 402



The prediction of atmospheric corrosion from meteorological and pollution parameters—I. Annual corrosion
S Feliu, M Morcillo, S Feliu Jr
Corrosion Science 34 (3), 403-414 1993
Citations: 323



EIS study of the corrosion behaviour of zinc-based coatings on steel in quiescent 3% NaCl solution. Part 1: directly exposed coatings
V Barranco, S Feliu Jr, S Feliu
Corrosion Science 46 (9), 2203-2220 2004
Citations: 272



Confinement of the electrical signal for in situ measurement of polarization resistance in reinforced concrete
S Feliu, JA Gonzlez, MC Andrade
Materials Journal 87 (5), 457-460 1990
Citations: 220



Electrochemical impedance spectroscopy for the measurement of the corrosion rate of magnesium alloys: Brief review and challenges
S Feliu Jr
Metals 10 (6), 775 2020
Citations: 212



The prediction of atmospheric corrosion from meteorological and pollution parameters—II. Long-term forecasts
S Feliu, M Morcillo, S Feliu Jr
Corrosion Science 34 (3), 415-422 1993
Citations: 207



XPS study of the surface chemistry of conventional hot-dip galvanised pure Zn, galvanneal and Zn–Al alloy coatings on steel
S Feliu Jr, V Barranco
Acta materialia 51 (18), 5413-5424 2003
Citations: 177



Correlation between the surface chemistry and the atmospheric corrosion of AZ31, AZ80 and AZ91D magnesium alloys
S Feliu Jr, A Pardo, MC Merino, AE Coy, F Viejo, R Arrabal
Applied Surface Science 255 (7), 4102-4108 2009
Citations: 167



The effect of macrocells between active and passive areas of steel reinforcements
C Andrade, IR Maribona, S Feliu, JA Gonzlez, S Feliu Jr
Corrosion science 33 (2), 237-249 1992
Citations: 143



XPS study of the effect of aluminium on the atmospheric corrosion of the AZ31 magnesium alloy
S Feliu Jr, MC Merino, R Arrabal, AE Coy, E Matykina
Surface and Interface Analysis: An International Journal devoted to the 2009
Citations: 113



Corrosion product layers on magnesium alloys AZ31 and AZ61: Surface chemistry and protective ability
S Feliu Jr, I Llorente
Applied Surface Science 347, 736-746 2015
Citations: 111



Combined effect of composition and surface condition on corrosion behaviour of magnesium alloys AZ31 and AZ61
A Samaniego, I Llorente, S Feliu Jr
Corrosion Science 68, 66-71 2013
Citations: 109



Effect of the chemistry and structure of the native oxide surface film on the corrosion properties of commercial AZ31 and AZ61 alloys
S Feliu Jr, C Maffiotte, A Samaniego, JC Galvn, V Barranco
Applied Surface Science 257 (20), 8558-8568 2011
Citations: 107



Relationship between conductivity of concrete and corrosion of reinforcing bars
S Feliu, JA Gonzlez, S Feliu, C Andrade
British corrosion journal 24 (3), 195-198 1989
Citations: 94



Deterioration of cathodic protection action of zinc-rich paint coatings in atmospheric exposure
S Feliu, M Morcillo
Corrosion 57 (07) 2001
Citations: 82



Atmospheric corrosion of magnesium alloys AZ31 and AZ61 under continuous condensation conditions
S Feliu Jr, C Maffiotte, JC Galvn, V Barranco
Corrosion Science 53 (5), 1865-1872 2011
Citations: 77



Effect of naturally formed oxide films and other variables in the early stages of Mg-alloy corrosion in NaCl solution
S Feliu Jr, C Maffiotte, A Samaniego, JC Galvn, V Barranco
Electrochimica Acta 56 (12), 4554-4565 2011
Citations: 76



Electrochemical estimation of the corrosion rate of magnesium/aluminium alloys
A Pardo, S Feliu Jr, MC Merino, R Arrabal, E Matykina
International Journal of Corrosion 2010 (1), 953850 2010
Citations: 73



Corrosion detecting probes for use with a corrosion-rate meter for electrochemically determining the corrosion rate of reinforced concrete structures
S Feliu, JA Gonzalez, V Feliu, S Feliu Jr, ML Escudero, ...
US Patent 5,259,944 1993
Citations: 54



Native air-formed oxide film and its effect on magnesium alloys corrosion
S Feliu Jr
The open corrosion journal 2010
Citations: 52

GRANT DETAILS

Winner of the Metals 2022 Best Paper Award (