Papers by ISMALIZA ISMAIL
Journal of Engineering and Science Research
This paper describes the effect of post-treated mild steel substrates containing a sodium dodecyl... more This paper describes the effect of post-treated mild steel substrates containing a sodium dodecyl benzenesulfonate:zinc sulfate (SDBS:ZnSO4) inhibitor mixture as the first layer pre-treatment with 3-glycidoxypropyltrimethoxysilane (3- GPS) on the overall corrosion protection and adhesion of an epoxy protective coating. The protective layer was characterized by linear polarisation resistance measurement (LPR), electrochemical impedance spectroscopy (EIS), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS) tests, while the adhesion of the epoxy coating to this pre-treated mild steel was evaluated by a pull-off test. The silane-post treated SDBS:ZnSO4 mild steel showed excellent corrosion resistance in sodium chloride solution with good adhesion to the epoxy coating. However, the adhesion was highly dependent on the silane post-treatment methods. The increase in corrosion resistance and adhesion is due to increased surface passivation and the for...
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Journal of Rubber Research, Oct 12, 2022
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Solid State Phenomena, 2021
In this study, poly(m-aminophenol) (PMAP) coating was electrochemically synthesized by cyclic vol... more In this study, poly(m-aminophenol) (PMAP) coating was electrochemically synthesized by cyclic voltammetry (CV) on mild steel surface to investigate the effects of its barrier protection within the scope of its electrochemical impedance towards further oxidation of the mild steel substrates. The developed PMAP coating were characterized by Fourier Transform Infrared (FTIR) spectroscopy and Field Emission Scanning Electron Microscopy (FESEM). The barrier resistance ability of PMAP coating towards corrosion of mild steel was determined in 0.5 M aqueous sodium chloride solution (NaCl) at various immersion times by the electrochemical impedance spectroscopy (EIS). The barrier properties were interpreted through impedance measurement using Nyquist and Bode plots. Equivalent electrical circuit models derived from the plots were employed to describe the coating barrier behaviour and performance. Data obtained showed that, the oxidation peak of PMAP coating were observed at potential +1.0 V ...
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Corrosion Engineering, Science and Technology, 2021
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Solid State Phenomena, 2021
In this study, mild steel was treated with SDBS:ZnSO4 compound by immersing the mild steel substr... more In this study, mild steel was treated with SDBS:ZnSO4 compound by immersing the mild steel substrates in a SDBS:ZnSO4 bath of varying pH. The effect of bath solution pH and immersion time on the corrosion protection properties of SDBS:ZnSO4 pre-treated mild steel in sodium chloride solution was investigated using electrochemical impedance spectroscopy (EIS) and polarization measurements. From the EIS results, it was found that the inhibition efficiency provided by the pre-treatment was significantly affected by the pH of the bath solution, where inhibition was highest at pH 6. This is due to the formation of a good protective layer on mild steel substrate caused by the deposition of zinc hydroxide/oxide and SDBS compound. Increasing the immersion time from 1 h to 24 h increased the inhibition efficiency. From the polarization measurements, the current density was significantly reduced, and the shift to a more positive corrosion potential value indicated a higher protection layer was...
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An FE study of the behaviour of concrete blocks compressed against rubber sheets was conducted. T... more An FE study of the behaviour of concrete blocks compressed against rubber sheets was conducted. The results were compared to experimental tests of the same assembly reported in the literature. It was found that tensile stresses developed within the concrete due to non-uniform compression of the rubber and were likely to have been the cause of failure of the concrete except where the rubber sheet was very thin or absent. The effect disappeared if contact between the rubber and concrete was frictionless.
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Rubber Chemistry and Technology, 2017
Rubber/metal composites are known to be highly durable in a normal atmospheric condition. However... more Rubber/metal composites are known to be highly durable in a normal atmospheric condition. However, when they are exposed to an aggressive environment such as the marine environment, they tend to fail prematurely. The failure is usually caused by the loss of adhesion of the rubber to metal substrate. The aim of this work is to elucidate the adhesion failure mechanism by using a commercial bonding system for bonded rubber/metal exposed in a marine environment. A simulation study that was carried out through a salt spray test indicated that corrosion of the exposed metal substrates induced the loss of adhesion through cathodic disbonding. Laboratory exposure in alkaline medium, cathodic disbonding, and anodic undermining tests suggested that the hydroxyl ions generated from corrosion reactions contributed to the adhesion failure.
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International Journal of Chemical Engineering and Applications, 2013
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AIP Conference Proceedings
Rubber fabric coated is a unique rubber-textile composite, in which technical textile acts as rei... more Rubber fabric coated is a unique rubber-textile composite, in which technical textile acts as reinforcing material and strength providing material. In rubber textile composite, rubber to fabric adhesion plays the most critical role for determining assembly process and ultimate strength of product. A vulcanisable adhesive for rubber to fabric fabrication of composite material was developed which compatible with rubber as well as fabric. Evaluation of bonding system with respect to peel strength, shear adhesion strength and weave pattern of fabrics were the major determining criteria for selection and optimization of fabric for rubber hose application. Thus adhesive Cohedure with characteristics of high adhesive strength in Natural Rubber Polyester Fabric compound has been developed.
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Papers by ISMALIZA ISMAIL