Noraziana Parimin
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Preferred name
Noraziana Parimin
Official Name
Noraziana, Parimin
Alternative Name
Parimin, N.
Noraziana, Parimin
Main Affiliation
Scopus Author ID
55955288500
Researcher ID
GCS-3360-2022

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  • Publication
    Oxide growth behaviour of 800H and HR-120 series ni-based alloys on isothermal oxidation
    ( 2024-03)
    Nurul Athirah Zainal @ Zaiton
    ;
    Noraziana Parimin
    ;
    Aqmar Ikhmal Anuar
    ;
    Nur Farhana Hayazi
    ;
    Farah Farhana Zainal
    The isothermal oxidation of two types of Ni-based alloy, alloys 800H and HR-120 was investigated in this study. The alloy underwent an isothermal oxidation test at 950 ºC for 150 hours of exposure. Oxdised alloys were tested using oxidation kinetics methods, phase analysis using X-ray diffraction (XRD) and oxide morphology using scanning electron microscopy (SEM) techniques. Oxidation kinetics were determined based on the weight change per surface area of the oxidised alloy over a 30-hour interval. As a result, both alloys displayed a pattern of weight gain as the exposure period increased. Both alloys have followed a parabolic rate law, indicating a controlled kinetics of oxide scale diffusion. XRD analysis showed that the main Cr-containing oxide has formed on the surface of the alloy with the addition of Ti oxide for the 800H alloy and Nb oxide for the HR-120 alloy due to the different alloying element content of the two alloys. Oxide surface morphology records the uniform oxide scale that forms on the surface of the alloy.
  • Publication
    Effect of primer layer and curing method on geopolymer paste coating properties
    ( 2024-12)
    Farah Farhana Zainal
    ;
    Jie Xin See
    ;
    Noraziana Parimin
    ;
    Nur Farhana Hayazi
    ;
    Sri Hastuty
    This technical paper presents a comprehensive study on the properties of geopolymer coating applied to mild steel pipelines as a potential alternative to Ordinary Portland cement (OPC) concrete structures. The geopolymer paste was formulated using a mixture of fly ash and alkaline activators, specifically sodium hydroxide (NaOH) solution and sodium silicate (Na2SiO3) solution. Two types of primers, epoxy metal primer and self-etch primer were applied before the geopolymer coating and various curing conditions were investigated. The geopolymer samples were subjected to two different curing processes: one set was cured in an oven at 60°C for 24 hours while the other set was left to cure under ambient conditions. After the curing period, the samples were aged at ambient conditions for 28 days. The properties of the fly ash and geopolymer paste were evaluated through a range of tests including phase analysis, morphology analysis, optical emission spectroscopy (OES) analysis, chemical composition analysis and adhesion strength testing. The results revealed that the geopolymer coatings exhibited surface cracks and efflorescence attributed to unreacted sodium oxide. X-Ray diffraction (XRD) analysis confirmed the presence of quartz, hematite, magnetite, aluminum oxide and mullite in the geopolymer coating. The self-etch primercoated samples demonstrated improved adhesion and corrosion resistance properties with a denser and more cohesive microstructure. The geopolymer coating when applied with a self-etch primer and cured at 60°C for 2 hours, achieved the highest adhesion strength of 2.2 MPa, indicating strong bonding with the mild steel pipelines. These findings contribute to the understanding of geopolymer coatings and their potential application in enhancing the performance and durability of mild steel pipelines, offering a sustainable alternative to conventional concrete coatings with improved corrosion resistance and adhesion properties.