RT Generic
T1 Permanganate-Fluorozirconate conversion coating as precursor for Flash-PEO on AZ31B magnesium alloy
A1 Guerra Mutis, Marlon Hernando
A1 Vega Vega, Jesus Manuel
A1 Matykina, Endzhe
A1 Arrabal Durán, Raúl
AB The corrosion resistance of AZ31B magnesium alloy was evaluated after a two-step surface treatment consisting of a permanganate–fluorozirconate conversion layer followed by Flash-PEO in a silicate–fluoride (SiF) electrolyte.Electrochemical tests after 24 hours immersion in 0.5 wt.% NaCl demonstrated that the structured coating reduced the corrosion rate when compared to the reference Flash-PEO SiF coating ((3.4 ±1.0)x10-6 mm·yr-1 versus (1.3±0.8)x10-5 mm·yr-1). After 72 hours, this trend persisted, with impedance values at low frequency one order of magnitude higher than its counterpart without precursor layer ((1.4±1.0)x107 Ω·cm2 versus (2.6±1.0)x106 Ω·cm2). Notably, Flash-PEO coatings in both cases preserved electrochemical integrity even in the presence of pre-existing surface defects.The permanganate–fluorozirconate precursor layer promoted, after Flash-PEO processing, a distinctive “coral reef-like” morphology with reduced interconnected porosity, thereby enhancing barrier properties by limiting substrate exposure to the corrosive environment. Complementary characterization confirmed the incorporation of zirconium and manganese species, along with compounds typically derived from the Flash-PEO SiF electrolyte.
PB ELSEVIER
YR 2025
FD 2025-10-09
LK https://hdl.handle.net/20.500.14352/125555
UL https://hdl.handle.net/20.500.14352/125555
LA eng
NO Hace parte del fichero:27 archivos MS Excel con información correspondiente a los datos graficados en el artículo y en información suplementaria.2 archivos MS Word con tablas presentadas en el artículo y en información suplementaria.2 archivos MS PowerPoint con las imágenes presentadas en el artículo y en información suplementaria.2 videos en formato .AVI
NO Agencia Estatal de Investigación (España)
NO Ministerio de Ciencia, Innovación y Universidades (España)
NO Feder, UE
NO European Union NextGenerationEU/PRTR
DS Docta Complutense
RD 8 nov 2025