Zuraidawani Che Daud
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Zuraidawani Che Daud
Official Name
Zuraidawani, Che Daud
Alternative Name
Daud, Zuraidawani Che
Che Daud, Zuraidawani
Daud, Z. C.
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Scopus Author ID
36782184300
Researcher ID
AAR-1755-2020

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  • Publication
    Characterization of Al–Mg Alloy by Powder Metallurgy Technique
    ( 2023-01-01)
    Zuraidawani Che Daud
    ;
    Mohd Asri N.M.
    ;
    Mohd Nazree Derman
    The powder metallurgy Al has been widely used in the heavy industry, especially in precision technology. Unfortunately, these new materials are problematic in powder metallurgy production and corrosion problems. This research paper aims to study the influence of Mg contents (10, 25, 50, 75, and 90) wt% on microstructure and corrosion behavior on Al–Mg alloy by using powder metallurgy techniques. Al–Mg powder was mixed using a rotation mill with a rotation speed of 120 rpm for 30 min. Then, the mixed powders were compacted at a pressure of 150 MPa. Sintering was done in an argon-controlled atmosphere at a temperature of 500 Â°C. An optical microscope was used to observe the microstructure of sintered sample; meanwhile, X-ray diffraction (XRD) was used to analyze phase identification. A potentiostat was used to study the corrosion behavior of sintered Al–Mg alloy. The results revealed that Al–90 wt% Mg gives a high corrosion rate.
  • Publication
    Oxide Film Formation on Stainless Steel 304L by Anodizing Method with Different Power Sources
    ( 2023-01-01)
    Azmi N.S.
    ;
    Mohd Nazree Derman
    ;
    Zuraidawani Che Daud
    In order to generate a nanoporous oxide film, stainless steel 304L is anodized using an alternating current (AC) and direct current (DC) source in an ethylene glycol solution containing ammonium fluoride, NH4F, and water, H2O. This study focuses on the differences between AC and DC anodizing in terms of current density versus time response, thickness, and depth of the oxide film formed on the anodized specimens, surface roughness, and element composition of the specimens because there is limited study on AC anodizing of stainless steel. In 0.5% of 0.3M NH4F and 3% H2O in ethylene glycol solution, the AC and DC anodizing are conducted for 30 minutes at voltages ranging from 30V to 50V and 21.2 V to 35.4 V, respectively. The current density versus time response revealed that AC anodizing produced more current density than DC anodizing. As for the thickness and depth of the generated oxide films, only the specimens that have been anodized in AC indicated an increase in these films, whereas specimens that have been anodized in DC showed the metal dissolving as the specimens degraded. The surface roughness of AC anodized specimens reduced with increasing anodizing voltage, whereas DC anodized specimens increased with increasing anodizing voltage. The element composition of the anodized specimens revealed that the mass percentage of oxygen, O element is higher for AC anodized specimens compared to DC specimens. This suggests that AC anodizing on stainless steel might offer important advantages and should be further researched.
  • Publication
    Impact of AC Anodizing on SS304L Oxide Film and Its Effect on Hydrogen Evolution Reaction (HER) Properties
    ( 2023-12-01)
    Azmi N.S.
    ;
    Mohd Nazree Derman
    ;
    Zuraidawani Che Daud
    The effect of AC anodizing on the formation of oxide film on stainless steel 304L (SS304L) surfaces and its influence on the hydrogen evolution reaction (HER) were studied in this study. The SS304L specimens were prepared before being anodized for 30 minutes at various voltages (range from 10 V to 50 V) using an AC power supply at room temperature. The surface morphology is studied using scanning electron microscope (SEM) and 3D profilometer. A potentiostat is used to run linear sweep voltammetry (LSV) and Tafel analysis for the HER characterization. The result recorded the highest thickness of 9273.45 nm at 40 V anodizing voltage and the lowest surface roughness of 837.16 nm recorded at 50 V. The linear sweep polarization test solution exhibited the lowest overpotential at 50 V, 398.3 mV and a Tafel slope of 196 mVdec-1. These findings provide insight on the possibility of AC anodizing for improving the surface characteristics of SS304L for use in energy conversion applications.
  • Publication
    Heat treatment of ss 316l for automotive applications
    ( 2020-01-01)
    Nur Maizatul Shima Adzali
    ;
    Azhar N.A.
    ;
    Zuraidawani Che Daud
    ;
    Nur Hidayah Ahmad Zaidi
    ;
    Adnan S.A.
    Stainless steel 316L (SS 316L) is a low carbon-chromium-nickel-molybdenum austenitic stainless steel. Its application in automotive industry include as exhaust housings for catalytic converters and turbocharger. In this research, the tempering heat treatment was conducted by using SS 316L samples. These steels were austenitized at 860 °C for 1 hours before doing two tempering process. Austempering was conducted at 360 °C for 15 min in the muffle furnace then air cooled while martempering was conducted at 160 °C for 15 min in a muffle furnace then quench in water. The corrosion test was carried out using 1.0 M oxalic acid solution for 30 days in room temperature. Hardness test and microstructural observation were carried out for SS 316L before and after corrosion test. Experimental result showed that untreated sample have highest hardness value before and after corrosion test which were 232 HV and 225 HV respectively. The hardness value before corrosion test is 199.7 HV for austempered sample, and 201.3 HV for martempered sample. Untreated sample shows the lowest corrosion rate (0.94×10-3 mpy), followed by austempered sample (1.89 x 10-3 mpy) and the highest corrosion rate is for martempered sample (2.36×10-3 mpy). After corrosion, under optical microscope observation, martempered steel has more pits than austempered steel. In summary, austempering is the best heat treatment for SS 316L in automotive applications that give high ductility and toughness after heat treatment with high corrosion resistance.
  • Publication
    Characterization of Co-Cr-Mo (F-75) alloy produced by solid state sintering
    (Universiti Malaysia Perlis (UniMAP), 2010-09-06)
    Zuraidawani Che Daud
    ;
    Shamsul Baharin Jamaludin
    ;
    Fazlul Bari
    This research was carried out to fabricate and characterize Co-Cr-Mo (F-75) alloy. The samples have been prepared via solid state sintering. The powders were supplied by Sandvik Osprey Ltd, UK and special design for biomedical applications. The lab work comprises the mixing of F-75 powder with 2 wt. % of binder. The mixture was cold compacted using uniaxially press at 500 MPa. The samples were sintered at three different temperatures (1250 °C, 1300 °C and 1350 °C) in inert environment for 90 minutes of sintering time. The sintered samples were characterized by using scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS) and optical microscope (OM) Olympus BX41M. Bulk density, apparent porosity, percentage of linear shrinkage, and microhardness of the samples were also characterized. The average of the grain sizes were measured by line intercepts method. The optical micrographs showed the difference grain size in all sintered samples after etching with Marble reagent. The result shows the percentage of linear shrinkage, bulk density value and porosity increase with increasing the sintering temperature. Beside that, higher sintering temperature yields coarser grain structure.
  • Publication
    Hydrogen Evolution Reaction of AC Anodized Stainless Steel 304L
    ( 2023-01-01)
    Azmi N.S.
    ;
    Mohd Nazree Derman
    ;
    Zuraidawani Che Daud
    A novel method of anodizing stainless steel (SS) 304L with alternating current (AC) as the power source is presented in order to generate a porous oxide layer. This study aims to investigate the influence of AC anodizing of SS304L on hydrogen evolution reaction (HER) activity and characterize the morphology of oxide film formed. The AC anodization method was carried out using an AC power source in a solution of ammonium fluoride, NH4F, water, H2O and ethylene glycol at room temperature, with anodizing time ranging from 10 to 50 minutes. Scanning electron microscope (SEM) and a 3D profiler were used to characterize the surface morphology, and a potentiostat is used to study the behaviour of the HER. The results show that the oxide film gradually covered the SS304L surface and fully covered at 30 minutes anodizing time, then begin to crack at 40 and 50 minutes. The thickness of the layer reached its maximum at 5248.67 nm with pore size of 380.13 nm after 30 minutes and then gradually began to decrease. Notably, the lowest HER activity, measuring -426.58 mV, was detected after 30 minutes. These findings clarified the relationship between the AC anodizing time, oxide film morphology, and HER activity, making it easier to optimize stainless steel 304L for enhanced hydrogen evolution applications.
      2  24
  • Publication
    The effect of aging time on microstructure and hardness value of AZ80 Mg Alloy
    ( 2020-11-24)
    Zuraidawani Che Daud
    ;
    Siti Hajar Azahar
    ;
    Mohd Nazree Derman
    ;
    Sinar Arzuria Adnan
    ;
    Nur Hidayah Ahmad Zaidi
    ;
    Nur Maizatul Shima Adzali
    AZ 80 Magnesium (Mg) alloy (AZ80) is the lightest structural metallic materials with good mechanical properties. However, Mg AZ80 has drawbacks which result in poor ductility and low strength where applications of Mg alloy have been restricted. The AZ80 has high aluminium content can cause the precipitation of ß-phase which is Mg17Al12 in Mg-Al alloy. It can affect the mechanical properties such as poor strengthening. This paper was discussed the effect of aging time on microstructure and hardness value of AZ80. The AZ80 samples were cut to 1cm × 1cm. Samples heat treated at 360 C for one-hour quenching in water. Then, samples aged at 170 C with different aging times (2 to 8 hours) with same quench. Optical Microscope (OM), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Vickers Microhardness machine were used to analyse the samples. As the results showed ß-Mg17Al12 phase was discontinuously distributed along the grain boundary throughout solid solution treatment. The ß-Mg17Al12 phase did not fully dissolve into the α-Mg phase and distributed along the grain boundary. The results showed that sample after 2 hours aging time with highest hardness value 62.5 HV is the optimum sample.
      36  2
  • Publication
    THE MORPHOLOGY AND ELECTROCHEMICAL STUDIES OF AC ANODIZED SS304L UNDER VARIOUS ANODIZING CONDITIONS
    ( 2023-05-01)
    Azmi N.S.
    ;
    Mohd Nazree Derman
    ;
    Zuraidawani Che Daud
    A novel method of anodizing stainless steel (SS) 304L with alternating current (AC) as the power source is presented in the interest of producing a porous oxide film. Since there is a scarcity of research on AC anodizing, this research work is focused on the electrochemistry and morphology of the oxide film generated on the SS304L. The anodizing is done in an ethylene glycol solution containing different concentrations of ammonium fluoride, NH4F, varying from 0.5 wt.% to 7 wt.%. The anodizing voltage is fixed to 40 V and the process is carried out at 25oC for 30 minutes. The electrochemical studies using the Tafel polarization method in terms of corrosion rate showed decreased values from 0.2842 mm/year to 0.1026 mm/year of the as-received, and anodized 3.0 wt.% specimens, respectively. For morphological studies, the oxide film formed on the anodized SS304L is characterized using a scanning electron microscopy (SEM) and the thickness of the oxide film formed is recorded using 3D profilometer. The morphology demonstrated the formation of the porous arrangement with localized parts of the surface oxide layer and the thickness of the oxide film rises at 2.65 µm and 4.29 µm, respectively, when the NH4F concentration increases from 0.5 wt.% to 1.0 wt.%. This indicates that there are significant advantages of using AC anodizing on stainless steel.
      17  2
  • Publication
    The effects of henna fillers on the properties of polyurethane foam composites
    ( 2020-01-01)
    Adnan S.A.
    ;
    Zainuddin F.
    ;
    Nur Hidayah Ahmad Zaidi
    ;
    Zulkeply N.A.
    ;
    Nur Maizatul Shima Adzali
    ;
    Zuraidawani Che Daud
    Polyurethane (PU) foam were produced from polyol (PolyGreen R3110) and 4,4-diphenylmethane diisocyanate (Maskiminate 80) with distilled water as a blowing agent. Natural fibers have received more attention from researchers due to their ability to increase the properties of the polymer composites. In this work, PU/Henna foam composites were prepared by used Henna fibers at different loading of 5, 10, 15 and 20 wt. %. The effect of different Henna loading on PU foam were investigated by density, compression test, morphology and water absorption. Core density of PU/Henna foam composites increased with addition Henna compared to control PU and showed highest core density of 85.10 kgm-3 . Compressive strength decreased to 0.53 MPa after Henna addition at 5 % PU/Henna foam composites. Henna addition to 20 % PU/Henna foam composites were reduced the compressive strength to 0.97 MPa due to stiffness effect of Henna that contributed to embrittlement of the cell wall. The distorted cell wall and less uniform of cell structure were proved by SEM due to Henna addition as compared to control PU. Water absorption percentage of PU/Henna foam composites were increased with Henna addition as compared to control PU. It is because hydrophilic properties of Henna tendency to absorb moisture.
      2  29
  • Publication
    Corrosion resistance improvement of 6061 aluminum alloy using anodizing process
    ( 2024-01-01)
    Zuraidawani Che Daud
    ;
    Shukri M.F.
    ;
    Mohd Nazree Derman
    Aluminum alloy is a material that is frequently used in the aerospace and transportation industries due to its high mechanical and corrosion resistance qualities. Unfortunately, aluminum alloys are prone to corrosion, limiting their application in some harsh situations such as when submerged in aqueous environments. The purpose of this study is to investigate how anodizing can increase the corrosion resistance of 6061 Aluminum alloy. The anodizing process was carried out using two different parameters which are voltage (5V, 10V, 15V) and electrolyte sulfuric acid (H2SO4) concentration (0.3M, 0.5M) for 1 hour. The anodized samples were performed using several analyses such as X-ray diffraction (XRD) analysis, morphology analysis, and corrosion test. From this study, it is found that the difference in anodizing parameters affects the corrosion resistance of the samples. Sample anodized at 15V, 0.5M gives the best corrosion resistance.
      21  6