Papers by Author: Z.H.Z Abidin

Abstract: Corrosion protection is one of the important performance properties of organic coatings. In this study, an attempt has been made to develop a high temperature coating. Different compositions of silicone and polyester resins are taken and mixed well with the addition of a hardener. The binder system is applied on the pre-treated cold rolled steel panels. Physical and mechanical properties are evaluated. Thermal resistance of the coating system is done according to specification of ASTM D2485 standards. DSC and TGA analyses are carried out to study the glass transition temperature and temperature dependence of the sample prepared respectively. Corrosion protection ability of the system is evaluated by electrochemical impedance spectroscopy (EIS) and immersion studies. From the thermal studies, the coating containing 40% silicone and 60% polyester has withstood up to 498 K.

Abstract: The corrosion protection property of the coating consisting of acrylic resin mixed with curcumin and dammar was investigated by immersing in 3% NaCl solution using potential - time measurement. The investigation was performed until corrosion occurred at the coating and substrate interface. As the coating degraded the penetration of electrolyte, the potential value of the coated sample decreases to a value of – 0.65 V. In this study the coating with pigment volume concentration of KC30% can withstand against corrosion by 3% NaCl solution.

Abstract: In this work, lawsonia pigment obtained from Henna leaves was mixed with acrylic resin and a mixture of acrylic and dammar resins (RD50%) to form two paint systems BC30% and BDP30%. The two paint systems were characterized by potential-time measurements, impact resistance, glass transition temperature (Tg) and cross hatch tests.

Abstract: Carbon are well known as active materials for energy storage and conversion. They are preferred because carbon materials have high electrical conductivity, low cost, high surface area, porosity, formability and possess good chemical and electrochemical resistivity. The most recently discovered novel carbon material is the carbon nanotubes, having unique geometrical structure and stable mechanical and chemical properties. The starting materials for carbon nanotubes production widely used are high purity graphite. Thus, two types of carbons were studied and thermal treatments were conducted at temperatures ranging from 600 – 800 °C for several hours. The effect of the pretreatment upon their morphology and surface area were looked into. It was found that significant changes occurred for the natural carbons while the synthetic carbons showed little or no changes at the particular temperature range. The thermal treatment has resulted in the exposure of fresh edge planes and microparticles as well as changes in the specific surface area and enhances their adsorption properties.