Siti Norbahiyah Mohamad BadariThis page provides access to scholarly publications by UniMAP Faculty members and researchers.http://dspace.unimap.edu.my:80/xmlui/handle/123456789/393022024-03-29T06:23:03Z2024-03-29T06:23:03ZA study on biocompatibility of gadolinium based anodizing coating AZ91D magnesium alloy in Simulated Body Fluid (SBF) solutionFarah Alina, Ab. AzizSiti Norbahiyah, Mohamad BadariMohd Zamzuri, Mohammad Zainhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/441502016-11-28T08:02:47Z2014-06-01T00:00:00ZA study on biocompatibility of gadolinium based anodizing coating AZ91D magnesium alloy in Simulated Body Fluid (SBF) solution
Farah Alina, Ab. Aziz; Siti Norbahiyah, Mohamad Badari; Mohd Zamzuri, Mohammad Zain
Pure Mg and AZ91D alloy was anodized with and without the gadolinium nitrate Gd(NO3)3 in different concentrations (0.001g/l, 0.025g/l, 0.05g/l, 0.075g/l and 0.09g/l) at a constant current density and treatment time of 10mA/cm2 and 5 minutes. The results showed that the optimum gadolinium concentration is 0.075g/l due to obtaining the anodic film with high corrosion resistance. The surface morphology and microstructure of anodic coating were investigated by scanning electron microscopy (SEM), optical microscope (OM), and potentiodynamic polarization, respectively.
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2014-06-01T00:00:00ZCharacterization of oxide film by vanadium based anodic oxidation coatingMohd Zamzuri, Mohammad ZainNor Fadzilah, TohaSiti Norbahiyah Mohamad Badarihttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/441472016-11-28T06:54:53Z2014-06-01T00:00:00ZCharacterization of oxide film by vanadium based anodic oxidation coating
Mohd Zamzuri, Mohammad Zain; Nor Fadzilah, Toha; Siti Norbahiyah Mohamad Badari
An oxide film was prepared on AZ91D magnesium alloy by anodizing in solution containing sodium metavanadate (NaVO3). The corrosion resistance of the AZ91D magnesium alloy was investigated at fixed current density 10 mA/cm2 for 5 min with different concentration of solution in the range of 0 - 1.0 g/l. The surface morphology, cross section morphology, phase structure, and surface roughness of oxide film were studied by optical microscope, scanning electron microscope (SEM) and energy dispersive spectrometry (EDS), atomic force microscope (AFM) and potentiodynamic polarization technique and corrosion test, respectively.
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2014-06-01T00:00:00ZCorrosion resistance by sodium metavanadate for AZ91D magnesium alloyNor Fadzilah, TohaSiti Norbahiyah, Mohamad BadariMohamad Zamzuri, Mohd Zainhttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/441462016-11-28T06:41:03Z2014-06-01T00:00:00ZCorrosion resistance by sodium metavanadate for AZ91D magnesium alloy
Nor Fadzilah, Toha; Siti Norbahiyah, Mohamad Badari; Mohamad Zamzuri, Mohd Zain
An oxide film was prepared on AZ91D magnesium alloy by anodizing in solution containing sodium metavanadate (NaVO3). The corrosion resistance of the substrate was investigated at a fixed current density 10 mA/cm2 for 5 mins with different concentration of solution in the range of 0 – 1.0 g/l. The surface morphology, phase structure and corrosion resistance of oxide film were studied by optical microscope, scanning electron microscope (SEM) and energy dispersive spectrometry (EDS) and X-ray diffractometer (XRD), potentiodynamic polarization technique and corrosion test.
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2014-06-01T00:00:00ZEffect of heat treatment on microstructure and corrosion behavior of Az91d magnesium alloyChye, Lih T.Mohd. Zamzuri, Mohammad ZainSiti Norbahiyah, Mohamad BadariKhairul Azwan, Ismail, Dr.Mohd Nazree, Derman, Dr.Suhaimi, Illiashttp://dspace.unimap.edu.my:80/xmlui/handle/123456789/340412014-04-25T01:58:45Z2013-01-01T00:00:00ZEffect of heat treatment on microstructure and corrosion behavior of Az91d magnesium alloy
Chye, Lih T.; Mohd. Zamzuri, Mohammad Zain; Siti Norbahiyah, Mohamad Badari; Khairul Azwan, Ismail, Dr.; Mohd Nazree, Derman, Dr.; Suhaimi, Illias
An AZ91D ingot in the as-cast condition was homogenized by heat treatment process. Then, the microstructures produced and corrosion behaviour after heat treatment was studied in detail. As-cast AZ91D was recrystallize by solution treatment at 415°C and then aged at 175°C for various period of time. The corrosion resistance of all the different microstructures was studied in NaCl solution through weight loss measurement in immersion testing. The β phase was found to have a significant influence on the corrosion behaviour. In solution treatment, β phase dissolution decreased the cathode area leading to accelerated corrosion rate. After aging treatment, fine β phase precipitates between grain and microstructure recrystallize causing an increase in the corrosion resistances.
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2013-01-01T00:00:00Z