Development of MgAl2O4 grain refiner in Al in-situ composite through H3BO3 addition

P. Chandramohan, P. A. Olubambi, R. Raghu, B. A. Obadele

Research output: Contribution to journalConference article

Abstract

In the present work, a novel approach has been made for synthesis of in-situ Magnesium Aluminate (MgAl2O4) particles in the Al-4Mg alloy by Boric Acid (H3BO3) precursor addition (1 wt %, 1.5 wt % and 2 wt %) during the casting process. The developed composite has been investigated for its microstructural characteristics and corrosion performance. Scanning Electron Microscopy and Energy Dispersive Spectroscopy examination revealed the formation of MgAl2O4 particles in the composite. Potentiodynamic polarization corrosion experiments were performed on the Al-4Mg/H3BO3 composite specimens (1 wt %, 1.5 wt % and 2 wt %) in three different medium (3.5 % Sodium Chloride-NaCl, 1 M Sulphuric Acid-H2SO4 and 1 M Hydrochloric Acid-HCl). Corrosion results showed that Al-4Mg/1.5 wt % H3BO3 composite specimen exhibited better corrosion resistance in 3.5 % NaCl, 1 M H2SO4 and 1 M HCl medium due to the significant grain refinement produced by MgAl2O4 particles. The developed composite with better corrosion properties can be utilized for marine and naval application.

Original languageEnglish
Article number012039
JournalIOP Conference Series: Materials Science and Engineering
Volume655
Issue number1
DOIs
Publication statusPublished - Nov 8 2019
Externally publishedYes
EventConference of the South African Advanced Materials Initiative 2019, CoSAAMI 2019 - Vanderbijlpark, South Africa
Duration: Oct 22 2019Oct 25 2019

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Corrosion
Composite materials
Boric acid
Hydrochloric Acid
Potentiodynamic polarization
Grain refinement
Sodium chloride
Hydrochloric acid
Sodium Chloride
Magnesium
Corrosion resistance
Energy dispersive spectroscopy
Casting
spinell
Scanning electron microscopy
Acids
Experiments
aluminum magnesium oxide
boric acid

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Engineering(all)

Cite this

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title = "Development of MgAl2O4 grain refiner in Al in-situ composite through H3BO3 addition",
abstract = "In the present work, a novel approach has been made for synthesis of in-situ Magnesium Aluminate (MgAl2O4) particles in the Al-4Mg alloy by Boric Acid (H3BO3) precursor addition (1 wt {\%}, 1.5 wt {\%} and 2 wt {\%}) during the casting process. The developed composite has been investigated for its microstructural characteristics and corrosion performance. Scanning Electron Microscopy and Energy Dispersive Spectroscopy examination revealed the formation of MgAl2O4 particles in the composite. Potentiodynamic polarization corrosion experiments were performed on the Al-4Mg/H3BO3 composite specimens (1 wt {\%}, 1.5 wt {\%} and 2 wt {\%}) in three different medium (3.5 {\%} Sodium Chloride-NaCl, 1 M Sulphuric Acid-H2SO4 and 1 M Hydrochloric Acid-HCl). Corrosion results showed that Al-4Mg/1.5 wt {\%} H3BO3 composite specimen exhibited better corrosion resistance in 3.5 {\%} NaCl, 1 M H2SO4 and 1 M HCl medium due to the significant grain refinement produced by MgAl2O4 particles. The developed composite with better corrosion properties can be utilized for marine and naval application.",
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Development of MgAl2O4 grain refiner in Al in-situ composite through H3BO3 addition. / Chandramohan, P.; Olubambi, P. A.; Raghu, R.; Obadele, B. A.

In: IOP Conference Series: Materials Science and Engineering, Vol. 655, No. 1, 012039, 08.11.2019.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Development of MgAl2O4 grain refiner in Al in-situ composite through H3BO3 addition

AU - Chandramohan, P.

AU - Olubambi, P. A.

AU - Raghu, R.

AU - Obadele, B. A.

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AB - In the present work, a novel approach has been made for synthesis of in-situ Magnesium Aluminate (MgAl2O4) particles in the Al-4Mg alloy by Boric Acid (H3BO3) precursor addition (1 wt %, 1.5 wt % and 2 wt %) during the casting process. The developed composite has been investigated for its microstructural characteristics and corrosion performance. Scanning Electron Microscopy and Energy Dispersive Spectroscopy examination revealed the formation of MgAl2O4 particles in the composite. Potentiodynamic polarization corrosion experiments were performed on the Al-4Mg/H3BO3 composite specimens (1 wt %, 1.5 wt % and 2 wt %) in three different medium (3.5 % Sodium Chloride-NaCl, 1 M Sulphuric Acid-H2SO4 and 1 M Hydrochloric Acid-HCl). Corrosion results showed that Al-4Mg/1.5 wt % H3BO3 composite specimen exhibited better corrosion resistance in 3.5 % NaCl, 1 M H2SO4 and 1 M HCl medium due to the significant grain refinement produced by MgAl2O4 particles. The developed composite with better corrosion properties can be utilized for marine and naval application.

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