Cerium-based thermal conversion treatments on silicon carbide reinforced 2009 aluminum alloy composites

I. Aziz; Q. Zhang; J. Du

doi:10.1002/maco.200905485

Cerium-based thermal conversion treatments on silicon carbide reinforced 2009 aluminum alloy composites

I. Aziz^*
, Q. Zhang
, J. Du

^*Corresponding author for this work

School of Materials Science and Engineering

Beihang University

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

7 Scopus citations

Abstract

The conversion coatings on SiC_p/2009 aluminum (Al) composites and 2009 Al alloy were obtained by immersing the samples into the cerium (Ce)-based solutions with varying the chemical concentration (CeCl ₃·7H₂O, NaCl), solution pH/temperature, immersing time, and drying temperature. The corrosion inhibition mechanism and kinetics were studied by using the electrochemical techniques and surface analyses. Potentiodynamic polarization tests showed that coatings improved corrosion resistance as compared to untreated samples and environmental factors played important role in the formation of conversion layer. Scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) analysis revealed that relatively high inhibition efficiency for composite with 25avol% SiC_p was due to the existence of rather high surface area of cathodic intermetallics/SiC_p, which support to deposit Ce oxides/hydroxides on the entire surface.

Original language	English
Pages (from-to)	258-263
Number of pages	6
Journal	Materials and Corrosion
Volume	62
Issue number	3
DOIs	https://doi.org/10.1002/maco.200905485
State	Published - Mar 2011

Keywords

SiC/2009 aluminum composite
XPS
cerium chloride
potentiodynamic polarization
thermal conversion coating

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10.1002/maco.200905485

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title = "Cerium-based thermal conversion treatments on silicon carbide reinforced 2009 aluminum alloy composites",

abstract = "The conversion coatings on SiCp/2009 aluminum (Al) composites and 2009 Al alloy were obtained by immersing the samples into the cerium (Ce)-based solutions with varying the chemical concentration (CeCl 3·7H2O, NaCl), solution pH/temperature, immersing time, and drying temperature. The corrosion inhibition mechanism and kinetics were studied by using the electrochemical techniques and surface analyses. Potentiodynamic polarization tests showed that coatings improved corrosion resistance as compared to untreated samples and environmental factors played important role in the formation of conversion layer. Scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) analysis revealed that relatively high inhibition efficiency for composite with 25avol\% SiCp was due to the existence of rather high surface area of cathodic intermetallics/SiCp, which support to deposit Ce oxides/hydroxides on the entire surface.",

keywords = "SiC/2009 aluminum composite, XPS, cerium chloride, potentiodynamic polarization, thermal conversion coating",

author = "I. Aziz and Q. Zhang and J. Du",

year = "2011",

month = mar,

doi = "10.1002/maco.200905485",

language = "英语",

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journal = "Materials and Corrosion",

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TY - JOUR

T1 - Cerium-based thermal conversion treatments on silicon carbide reinforced 2009 aluminum alloy composites

AU - Aziz, I.

AU - Zhang, Q.

AU - Du, J.

PY - 2011/3

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N2 - The conversion coatings on SiCp/2009 aluminum (Al) composites and 2009 Al alloy were obtained by immersing the samples into the cerium (Ce)-based solutions with varying the chemical concentration (CeCl 3·7H2O, NaCl), solution pH/temperature, immersing time, and drying temperature. The corrosion inhibition mechanism and kinetics were studied by using the electrochemical techniques and surface analyses. Potentiodynamic polarization tests showed that coatings improved corrosion resistance as compared to untreated samples and environmental factors played important role in the formation of conversion layer. Scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) analysis revealed that relatively high inhibition efficiency for composite with 25avol% SiCp was due to the existence of rather high surface area of cathodic intermetallics/SiCp, which support to deposit Ce oxides/hydroxides on the entire surface.

AB - The conversion coatings on SiCp/2009 aluminum (Al) composites and 2009 Al alloy were obtained by immersing the samples into the cerium (Ce)-based solutions with varying the chemical concentration (CeCl 3·7H2O, NaCl), solution pH/temperature, immersing time, and drying temperature. The corrosion inhibition mechanism and kinetics were studied by using the electrochemical techniques and surface analyses. Potentiodynamic polarization tests showed that coatings improved corrosion resistance as compared to untreated samples and environmental factors played important role in the formation of conversion layer. Scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS) analysis revealed that relatively high inhibition efficiency for composite with 25avol% SiCp was due to the existence of rather high surface area of cathodic intermetallics/SiCp, which support to deposit Ce oxides/hydroxides on the entire surface.

KW - SiC/2009 aluminum composite

KW - XPS

KW - cerium chloride

KW - potentiodynamic polarization

KW - thermal conversion coating

UR - https://www.scopus.com/pages/publications/79951896682

U2 - 10.1002/maco.200905485

DO - 10.1002/maco.200905485

M3 - 文章

AN - SCOPUS:79951896682

SN - 0947-5117

VL - 62

SP - 258

EP - 263

JO - Materials and Corrosion

JF - Materials and Corrosion

IS - 3

ER -

Cerium-based thermal conversion treatments on silicon carbide reinforced 2009 aluminum alloy composites

Abstract

Keywords

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