Journal of Adhesion Science and Technology, Mar 8, 2021
Corrosion inhibition of carbon steel in sulfuric acid solution was performed by three synthesized... more Corrosion inhibition of carbon steel in sulfuric acid solution was performed by three synthesized products named 2-(butylamino)-4-phenylnicotinonitrile (BAPN), 2-(propylamino)-4-phenylnicotinonitrile, and 2-(methylamino)-4-phenylnicotinonitrile using weight-loss method and scanning electron microscopy (SEM). The temperature impact on the inhibition mechanism of the synthesized inhibitors of the carbon steel surface was investigated at various temperatures (20–50 °C) where the inhibitive efficiency diminished with increasing temperatures. The maximum IE of 97.45% was achieved at a temperature of 20 °C, the concentration of BAPN inhibitor of 5×10-4 M, and H2SO4 acid concentration of 0.5 M. The adsorption of inhibitors studied onto the carbon steel surface obeys the Langmuir adsorption isotherm. The SEM surface analysis showed the formation of a protective organic film on the steel surface. The quantum chemical calculations (DFT) supported the experimental results and showed that the inhibition efficiency also depends on the structure of the inhibitor. Three inhibitors products based 2-Aminopyridine derivatives was studied on carbon steel in 0.5 M H2SO4 solution. Results of weight loss measurements and scanning electron microscopy image analyses are reported. In addition, quantum chemical calculations using density functional theory (DFT) were performed to estimate theoretically the reactivity parameters of the inhibitor.
Purpose The purpose of this study is to determine the effect of dimpled texture on ceramic coatin... more Purpose The purpose of this study is to determine the effect of dimpled texture on ceramic coating towards erosion wear. Design/methodology/approach The methodology of this experiment is based on ASTM G73, which is for erosion test for rotating apparatus. Mild steels samples were coated with alumina titania via the plasma spray method, and surface modification was done by producing different dimple densities using laser surface texturing. Two mediums were used: seawater environment and slurry environment. Findings Dimples of 150 μm diameter and 50 μm depth have proved to be successful in entrapping wear debris and other foreign materials during the erosion test. It was clearly noted that coatings with the highest number of dimples with 43 per cent had significantly improved the microhardness of the coated mild steels by twofold. Originality/value All this while, texturing was done only on substrate material. None was done on ceramic coating.
Purpose – The purpose of this paper is to make people aware of the increase usage of laser system... more Purpose – The purpose of this paper is to make people aware of the increase usage of laser system in surface texturing process. Design/methodology/approach – As it is a brief review paper, no particular method was used. Findings – It has been found that most of the surface texturing methods used mas laser beam machining using Nd:YAG laser. It shows that the realization of the textured surface helps to reduce friction and wear which can increase the life span of a material. Research limitations/implications – Most of the texturing is done on the substrates directly, and few research were conducted on coated surface of the material, which coating is also known as an excellent method to improve tribological properties. Originality/value – The paper shows details on the recent development of surface texturing and its contribution to friction and wear reduction.
Inhomogeneous materials and manufacturing tolerances occurred in the modern manufacturing and mat... more Inhomogeneous materials and manufacturing tolerances occurred in the modern manufacturing and material processing sectors frequently lead to premature failures. During the operation of the components, multiaxial loadings and stresses suffered damage of the structural integrity severely. Therefore, this paper discusses the utilisations of several high cycle multiaxial fatigue criteria in the probabilistic design and analysis. The variations of material and geometrical properties are taken into account in order to study the probability of failure. High cycle multiaxial fatigue criteria are then used to determine the equivalent stress and the deflection. The implementations of these criteria were realised using Ansys Parametric Design Language (APDL) provided in the commercial software ANSYS. From the probabilistic results, von Mises criterion underestimated the probability of failure especially for displacement cases while high cycle multiaxial fatigue criteria, specifically Dang Van and Crossland criteria, are more sensitive than other criteria to predict the most significant random variables that affect the structural integrity. Therefore, the utilisation of high cycle multiaxial fatigue criteria in probabilistic analysis is of paramount importance to ensure the safety and reliability when compared to the traditional von Mises stress criteria.
Transactions of The Institute of Metal Finishing, Jul 3, 2016
Materials with well-defined surface structures are prepared using protective coatings through sur... more Materials with well-defined surface structures are prepared using protective coatings through surface texturing, which is a novel method for modifying surface characteristics, particularly tribological and wettability, to improve the properties of material parts. The formation of a specific patterned surface can be achieved through abrasive blasting, reactive-ion etching, lithography and mechanical machining. This review focuses on laser technology because it generates the most controllable and precise geometries. This technique is environmentally friendly because it does not utilise any chemical reagent, nor does it produce significant waste.
Journal of Adhesion Science and Technology, Mar 8, 2021
Corrosion inhibition of carbon steel in sulfuric acid solution was performed by three synthesized... more Corrosion inhibition of carbon steel in sulfuric acid solution was performed by three synthesized products named 2-(butylamino)-4-phenylnicotinonitrile (BAPN), 2-(propylamino)-4-phenylnicotinonitrile, and 2-(methylamino)-4-phenylnicotinonitrile using weight-loss method and scanning electron microscopy (SEM). The temperature impact on the inhibition mechanism of the synthesized inhibitors of the carbon steel surface was investigated at various temperatures (20–50 °C) where the inhibitive efficiency diminished with increasing temperatures. The maximum IE of 97.45% was achieved at a temperature of 20 °C, the concentration of BAPN inhibitor of 5×10-4 M, and H2SO4 acid concentration of 0.5 M. The adsorption of inhibitors studied onto the carbon steel surface obeys the Langmuir adsorption isotherm. The SEM surface analysis showed the formation of a protective organic film on the steel surface. The quantum chemical calculations (DFT) supported the experimental results and showed that the inhibition efficiency also depends on the structure of the inhibitor. Three inhibitors products based 2-Aminopyridine derivatives was studied on carbon steel in 0.5 M H2SO4 solution. Results of weight loss measurements and scanning electron microscopy image analyses are reported. In addition, quantum chemical calculations using density functional theory (DFT) were performed to estimate theoretically the reactivity parameters of the inhibitor.
Purpose The purpose of this study is to determine the effect of dimpled texture on ceramic coatin... more Purpose The purpose of this study is to determine the effect of dimpled texture on ceramic coating towards erosion wear. Design/methodology/approach The methodology of this experiment is based on ASTM G73, which is for erosion test for rotating apparatus. Mild steels samples were coated with alumina titania via the plasma spray method, and surface modification was done by producing different dimple densities using laser surface texturing. Two mediums were used: seawater environment and slurry environment. Findings Dimples of 150 μm diameter and 50 μm depth have proved to be successful in entrapping wear debris and other foreign materials during the erosion test. It was clearly noted that coatings with the highest number of dimples with 43 per cent had significantly improved the microhardness of the coated mild steels by twofold. Originality/value All this while, texturing was done only on substrate material. None was done on ceramic coating.
Purpose – The purpose of this paper is to make people aware of the increase usage of laser system... more Purpose – The purpose of this paper is to make people aware of the increase usage of laser system in surface texturing process. Design/methodology/approach – As it is a brief review paper, no particular method was used. Findings – It has been found that most of the surface texturing methods used mas laser beam machining using Nd:YAG laser. It shows that the realization of the textured surface helps to reduce friction and wear which can increase the life span of a material. Research limitations/implications – Most of the texturing is done on the substrates directly, and few research were conducted on coated surface of the material, which coating is also known as an excellent method to improve tribological properties. Originality/value – The paper shows details on the recent development of surface texturing and its contribution to friction and wear reduction.
Inhomogeneous materials and manufacturing tolerances occurred in the modern manufacturing and mat... more Inhomogeneous materials and manufacturing tolerances occurred in the modern manufacturing and material processing sectors frequently lead to premature failures. During the operation of the components, multiaxial loadings and stresses suffered damage of the structural integrity severely. Therefore, this paper discusses the utilisations of several high cycle multiaxial fatigue criteria in the probabilistic design and analysis. The variations of material and geometrical properties are taken into account in order to study the probability of failure. High cycle multiaxial fatigue criteria are then used to determine the equivalent stress and the deflection. The implementations of these criteria were realised using Ansys Parametric Design Language (APDL) provided in the commercial software ANSYS. From the probabilistic results, von Mises criterion underestimated the probability of failure especially for displacement cases while high cycle multiaxial fatigue criteria, specifically Dang Van and Crossland criteria, are more sensitive than other criteria to predict the most significant random variables that affect the structural integrity. Therefore, the utilisation of high cycle multiaxial fatigue criteria in probabilistic analysis is of paramount importance to ensure the safety and reliability when compared to the traditional von Mises stress criteria.
Transactions of The Institute of Metal Finishing, Jul 3, 2016
Materials with well-defined surface structures are prepared using protective coatings through sur... more Materials with well-defined surface structures are prepared using protective coatings through surface texturing, which is a novel method for modifying surface characteristics, particularly tribological and wettability, to improve the properties of material parts. The formation of a specific patterned surface can be achieved through abrasive blasting, reactive-ion etching, lithography and mechanical machining. This review focuses on laser technology because it generates the most controllable and precise geometries. This technique is environmentally friendly because it does not utilise any chemical reagent, nor does it produce significant waste.
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Papers by Mariyam Jameelah Ghazali