Synthesis and protection of AM50 magnesium alloy and its composites using environmentally pretreatment electrolyte

This article details with the synthesis and surface modification of AM50 magnesium alloy and its composite (AM50-5%ZrO 2 and AM50-10% ZrO 2) substrate to improve the corrosion resistance. Environmentally friendly chemical conversion coating based on permanganate–phosphate solution was used in this s...

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Bibliographic Details
Published in:Surface & coatings technology 2011-12, Vol.206 (6), p.1041-1050
Main Authors: Hamid, Z. Abdel, El-khair, M.T. Abou, Hassan, H.B.
Format: Article
Language:English
Subjects:
AM50 Mg alloy
Applied sciences
Coatings
Conversion coatings
Corrosion
Corrosion environments
Corrosion prevention
Corrosion resistance
Cross-disciplinary physics: materials science
rheology
Electroless coatings
Exact sciences and technology
Magnesium base alloys
Materials science
Metallic coatings
Metals. Metallurgy
Mg composites
Morphology
Nickel base alloys
Physics
Production techniques
Protective coatings
Scanning electron microscopy
Surface treatment
Surface treatments
Synthesis
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Summary:This article details with the synthesis and surface modification of AM50 magnesium alloy and its composite (AM50-5%ZrO 2 and AM50-10% ZrO 2) substrate to improve the corrosion resistance. Environmentally friendly chemical conversion coating based on permanganate–phosphate solution was used in this study. Deposition of electroless Ni–P alloy and electrodeposition Ni onto AM50 magnesium alloys have been carried out. The influences of pretreatment steps on the surface morphology and composition analysis have been studied using scanning electron microscope/energy dispersed X-ray system (SEM/EDS). Additionally, the surface morphology and phase composition of the coatings were determined with (SEM/EDS) and X-ray diffraction (XRD), respectively. Moreover, potentiodynamic polarization tests have been used to estimate the corrosion behavior of unprotected and protected AM50 Mg and its composite alloys in 5% NaCl solutions. ► AM50 Mg alloy and its composites were successfully prepared by stir casting method. ► Permanganate–phosphate conversion coating was proposed as the pretreatment layer. ► Ni electrodeposition onto AM50 magnesium alloys improved its corrosion resistance.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2011.07.062