Anodization of AZ91D magnesium alloy in silicate-containing electrolytes

Houng Yu Hsiao; Hua Chih Tsung; Wen Ta Tsai

doi:10.1016/j.surfcoat.2004.12.010

Anodization of AZ91D magnesium alloy in silicate-containing electrolytes

Houng Yu Hsiao, Hua Chih Tsung, Wen Ta Tsai

Research output: Contribution to journal › Article › peer-review

150 Citations (Scopus)

Abstract

The effects of Al(NO₃)₃ and/or Na₂ SiO₃ additions in the anodizing electrolyte on the properties of the anodic films formed on AZ91D magnesium alloy were investigated. The base electrolyte used in this investigation was 3 M KOH+0.21 M Na₃PO₄+0.6 M KF solution. The crystal structure, chemical state, surface morphology and cross-section microstructure of the anodic film was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The corrosion behavior of anodized Mg alloy is examined using electrochemical impedance spectroscopy (EIS) in 3.5 wt.% NaCl solution. The results show that the anodic film was mainly composed of MgO. The additions of Na₂SiO₃ and/or 0.15 M Al (NO₃)₃ into to the base electrolyte enhanced the formations of Al₂O₃, MgAl₂O₄ in the silicate-containing anodized film, accompanied with silicate formation. Increased corrosion resistance of the anodic film was found when AZ91D Mg alloy was anodized in 3 M KOH+0.21 M Na₃ PO₄+0.6 M KF+0.15 M Al(NO₃)₃ with 0.1 M Na₂SiO₃ addition.

Original language	English
Pages (from-to)	127-134
Number of pages	8
Journal	Surface and Coatings Technology
Volume	199
Issue number	2-3 SPEC. ISS.
DOIs	https://doi.org/10.1016/j.surfcoat.2004.12.010
Publication status	Published - 2005 Sept 22

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Surfaces and Interfaces
Surfaces, Coatings and Films
Materials Chemistry

Access to Document

10.1016/j.surfcoat.2004.12.010

Cite this

@article{98213790fa6e44869f7bed9056219b2d,

title = "Anodization of AZ91D magnesium alloy in silicate-containing electrolytes",

abstract = "The effects of Al(NO3)3 and/or Na2 SiO3 additions in the anodizing electrolyte on the properties of the anodic films formed on AZ91D magnesium alloy were investigated. The base electrolyte used in this investigation was 3 M KOH+0.21 M Na3PO4+0.6 M KF solution. The crystal structure, chemical state, surface morphology and cross-section microstructure of the anodic film was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The corrosion behavior of anodized Mg alloy is examined using electrochemical impedance spectroscopy (EIS) in 3.5 wt.% NaCl solution. The results show that the anodic film was mainly composed of MgO. The additions of Na2SiO3 and/or 0.15 M Al (NO3)3 into to the base electrolyte enhanced the formations of Al2O3, MgAl2O4 in the silicate-containing anodized film, accompanied with silicate formation. Increased corrosion resistance of the anodic film was found when AZ91D Mg alloy was anodized in 3 M KOH+0.21 M Na3 PO4+0.6 M KF+0.15 M Al(NO3)3 with 0.1 M Na2SiO3 addition.",

author = "Hsiao, {Houng Yu} and Tsung, {Hua Chih} and Tsai, {Wen Ta}",

year = "2005",

month = sep,

day = "22",

doi = "10.1016/j.surfcoat.2004.12.010",

language = "English",

volume = "199",

pages = "127--134",

journal = "Surface and Coatings Technology",

issn = "0257-8972",

publisher = "Elsevier",

number = "2-3 SPEC. ISS.",

}

TY - JOUR

T1 - Anodization of AZ91D magnesium alloy in silicate-containing electrolytes

AU - Hsiao, Houng Yu

AU - Tsung, Hua Chih

AU - Tsai, Wen Ta

PY - 2005/9/22

Y1 - 2005/9/22

N2 - The effects of Al(NO3)3 and/or Na2 SiO3 additions in the anodizing electrolyte on the properties of the anodic films formed on AZ91D magnesium alloy were investigated. The base electrolyte used in this investigation was 3 M KOH+0.21 M Na3PO4+0.6 M KF solution. The crystal structure, chemical state, surface morphology and cross-section microstructure of the anodic film was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The corrosion behavior of anodized Mg alloy is examined using electrochemical impedance spectroscopy (EIS) in 3.5 wt.% NaCl solution. The results show that the anodic film was mainly composed of MgO. The additions of Na2SiO3 and/or 0.15 M Al (NO3)3 into to the base electrolyte enhanced the formations of Al2O3, MgAl2O4 in the silicate-containing anodized film, accompanied with silicate formation. Increased corrosion resistance of the anodic film was found when AZ91D Mg alloy was anodized in 3 M KOH+0.21 M Na3 PO4+0.6 M KF+0.15 M Al(NO3)3 with 0.1 M Na2SiO3 addition.

AB - The effects of Al(NO3)3 and/or Na2 SiO3 additions in the anodizing electrolyte on the properties of the anodic films formed on AZ91D magnesium alloy were investigated. The base electrolyte used in this investigation was 3 M KOH+0.21 M Na3PO4+0.6 M KF solution. The crystal structure, chemical state, surface morphology and cross-section microstructure of the anodic film was characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). The corrosion behavior of anodized Mg alloy is examined using electrochemical impedance spectroscopy (EIS) in 3.5 wt.% NaCl solution. The results show that the anodic film was mainly composed of MgO. The additions of Na2SiO3 and/or 0.15 M Al (NO3)3 into to the base electrolyte enhanced the formations of Al2O3, MgAl2O4 in the silicate-containing anodized film, accompanied with silicate formation. Increased corrosion resistance of the anodic film was found when AZ91D Mg alloy was anodized in 3 M KOH+0.21 M Na3 PO4+0.6 M KF+0.15 M Al(NO3)3 with 0.1 M Na2SiO3 addition.

UR - http://www.scopus.com/inward/record.url?scp=23044437299&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=23044437299&partnerID=8YFLogxK

U2 - 10.1016/j.surfcoat.2004.12.010

DO - 10.1016/j.surfcoat.2004.12.010

M3 - Article

AN - SCOPUS:23044437299

SN - 0257-8972

VL - 199

SP - 127

EP - 134

JO - Surface and Coatings Technology

JF - Surface and Coatings Technology

IS - 2-3 SPEC. ISS.

ER -

Anodization of AZ91D magnesium alloy in silicate-containing electrolytes

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this