Shaiful Rizam Shamsudin
Thumbnail Image
Preferred name
Shaiful Rizam Shamsudin
Official Name
Shaiful Rizam, Shamsudin
Alternative Name
Shamsudin, Saiful Rizam
Shamsudin, S. R.
Main Affiliation
Scopus Author ID
57923516300
Researcher ID
AFZ-3675-2022

Research Output

Filters

16
16
Reset filters

Settings
Now showing 1 - 10 of 16
Thumbnail Image
Publication

Effects of different pH of 3.5% NaCl solution on steel under zero charge corrosion protection technique

2021-11-12 , Wardan R. , Shaiful Rizam Shamsudin , Sampasivam T. , Mohd Fitri M.W. , Yati M.S.D.

The study is carried out to understand the new corrosion protection technique, non-polarization concept, using current/voltage pulses to achieve a potential of zero charges (Epzc) of the metal-solution interface. As a result, a cost-saving and ecological method has been proposed as a new anti-corrosion method. In the methodology, U-bend samples are immersed in a 3.5% NaCl solution with different pH values. The readings prove the occurrence of electrochemical reaction, absence of charges, and the effect of Epzc. An examination on the ZCCP on low-carbon steel in 3.5% NaCl solution was analyze for 120 hours days. This study is carried out to understand the concept of corrosion behaviour and a new corrosion protection technique which applies non-polarization concept. A U-bend mild steel is used to corrosion effect in various pH values under zero charge protection. Samples were then immersed in 3.5% NaCl solution with different pH values. Electrochemical behaviour of steel sample in 3.5% NaCl solution was analysed by means of Tafel extrapolation. It was found that Ecorr and icorr recorded dissimilar readings at different pH values. As Ecorr rises, icorr drops from pH 6 to pH 9, hence corrosion rate also decreases from pH 6 to pH 9. Zero charge corrosion protection (ZCCP) technique is used to study the efficiency of corrosion protection method in different pH values. Readings of alternating current (IAC) and direct voltage (VDC) are recorded throughout the ZCCP experiment. These readings prove the occurrence of electrochemical reaction, absence of charges and the effect of Epzc.

View
Thumbnail Image
Publication

Influence of flow accelerated corrosion on corrosion protection of mild steel in 3.5% NaCl solution

2024-03-07 , Mahalaksmi Gunasilan , Shaiful Rizam Shamsudin , Mohd Rafi Adzman , Siti Hawa Mohamed Salleh , Wan Mohd Haqqi Wan Ahmad , Mohamad K.A.A.K.

Mild steel is a primary material used to construct ships and other maritime structures. Corrosion protection systems are sometimes ineffective in aqueous mediums subjected to movement, flow, waves, and even turbulence under unpredictable conditions. This study aims to ascertain the influence of flow velocity on mild steel corrosion in the aqueous medium. The mild steel samples are immersed in a 3.5% sodium chloride (NaCl) solution for five days. They were protected against corrosion using an impressed current cathodic protection (ICCP) system. The flow velocity is increased to 200-800 rpm, while the stationary flow is also examined as a control. Data on the metal's potential and current density were collected, and the surface morphology was analyzed using a stereomicroscope. Corrosion protection occurs exclusively in stationary flow, whereas corrosion occurs in solutions flowing at a most studied velocity. Metals show corrosion severity levels ranging from 200 to 600 rpm with increasing current consumption and metal potential. At 800 rpm, the metal surface appears to begin passivating, reducing the current consumption and potential. The flow velocity accelerates corrosion, yet at the high-speed stream, the corrosion is slowed because the steel surface becomes passive and assists the corrosion protection.

View
Thumbnail Image
Publication

Effect physical and mechanical properties of fly ash-based geopolymers on corrosion reinforcement bar: A review

2020 , Siti Aisyah Abd Razak , Farah Farhana Zainal , Shaiful Rizam Shamsudin

A major concern for any society with reinforced concrete structures is steel corrosion. Much effort has been made to minimize corrosion damages in new structures and develop corrosion protection of existing structures. The physical and mechanical of fly ash-based geopolymer are enhanced with a few factors that influence its high performance than Ordinary Portland Cement concrete in many aspects such as compressive strength, workability, exposure to aggressive environment and high temperature. This review paper focus on effect of physical and mechanical properties of fly ash based geopolymer paste on the corrosion reinforcement bar. The geopolymerization process in geopolymer paste can improve the properties of fly ash-based geopolymers. Hence, the physical and mechanical properties is important the stability and contribute high compressive strength of geopolymer and improve the corrosion resistance of reinforcement bar.

View
Thumbnail Image
Publication

Effect on Current Density on Zero Charge Corrosion Protection of Pure Mg in 3.5% NaCl Solution

2021-11-12 , Gunasilan M. , Shaiful Rizam Shamsudin , Mohd Rafi Adzman , Salleh S.H.M. , Sanusi M.S. , Ahmad W.M.H.W.

The cathodic protection uses two-electrode polarization, which requires large currents and substantial voltages. Efforts are being made to identify possibilities for improvements by developing zero-charge corrosion protection techniques. Studies were performed to determine the zero-charges potential effect by analyzing corrosion signs on reactive metal samples such as pure Mg. Mg samples were fed by current/voltage pulses for 120 hours, with specified pulse parameters and varied Ecorr- offsets, ranging from +2 to -218 mV. The volumetric hydrogen gas collection technique is used to determine the hydrogen evolution rate. Surface observation is carried out by stereomicroscope to determine the presence of corrosion signs on the sample surface. Overall, all current densities and hydrogen evolution rates had very low readings on the studied Ecor offset parameters. Mg samples fed with pulses at -1800 and -1900 mV vs SCE revealed zero charge potential effects since their surface was clean and showed no indications of corrosion even after being exposed to the corrosive solution for 120 hours. Thus, corrosion protection is successfully done and meets the Epzc condition.

View
No Thumbnail Available
Publication

The effect of F-75 alloy mixed with HAP on microstructure in corrosion test for biomaterial applications

2010-09-06 , Rohaya Abdul Malek , Shamsul Baharin Jamaludin , Shaiful Rizam Shamsudin

Co-Cr-Mo (ASTM: F-75) alloy is generally used because of their mechanical properties, good wear and corrosion resistance as well as biocompatibility. In order to obtain chemical similarity and interfacial bond form between implanted biomaterials and living tissue, addition of Hydroxyapatite (HAP) is required. This study has focused on a research in F-75 alloy mixed with HAP fabricated by powder metallurgy (P/M) technique. The effect of HAP addition ranging 2 to 10 wt. % of HAP on biocompatibility (corrosion resistance) was examined. To analyse the result, the reference sample (F-75 alloy without HAP) and composites are compared. All samples are immersed into 0.9% NaCl solution at 37 ûC in 6-week duration. Every interval of 48 hours, the weight loss per area is recorded. By increasing amount of HAP, it is noticed that corrosion rate is increasing except for composite with 2 wt.% of HAP which has the lowest corrosion rate among others. The possibilities of increasing corrosion rate are the formation of general attack and pitting. Besides, the formation of apatite layer can be seen as predicted.

View
Thumbnail Image
Publication

Effect of Pulse Frequencies on Low Carbon Steel in 3.5 wt% NaCl Solution under Zero Charge Corrosion Protection

2020-11-24 , Wardan R. , Shaiful Rizam Shamsudin , Sanusi M.S. , Mohd Fitri M. W.

Zero charge corrosion protection (ZCCP) is an alternative to the existing cathodic protection methods. It applies a current/voltage pulse with a certain particular frequency to attain a potential of zero charge (Epzc) on the electrode-electrolyte interface. A study on the pulse frequencies of ZCCP system on low-carbon steel in 3.5 % NaCl Na solution was carried out for 14 days. The pulse frequencies are varied from 4, 20, 50 and 100 Hz. The ability of these frequencies in protecting samples is determined by means of corrosion rate based on weight loss analysis and surface morphology. Experimental observations indicate that low carbon steel corrosion protection is strongly influenced by changes in pulse frequency. Corrosion rates were found to gradually decrease as pulse frequency increased from 4, 20 to 50 Hz, nevertheless at higher frequencies (100 Hz), corrosion protection was observed to be less effective where the corrosion rate dramatically grew up. The surface morphology of the steel surface is smooth and protected at a pulse frequency of 50 Hz. This indicates that the current / voltage pulse of ZCCP system only requires 50 Hz which is equivalent to a standard AC power frequency applied in most countries including Malaysia.

View
Thumbnail Image
Publication

Modeling and Simulation of Metal Oxide Surge Arresters Models by using ATPDraw Software

2023-01-01 , Mohd Rafi Adzman , Ting K.X. , Shaiful Rizam Shamsudin , Gunasilan M.

Lightning is a natural phenomenon that occurs quite often, especially in Malaysia. Lightning is very dangerous as the voltage of the lightning is very high which can affect human daily living by damaging the electrical and electronic components. Thus, the study of lightning surges is essential in order to coordinate insulation to the electric power system. The function of the surge protection device (SPD) is to divert the surge current from the distribution line. This paper performed a comparison performance of simplified modeling of metal oxide surge arrester (MOSA). The typical models of the surge protection devices (SPDs) such as the IEEE and Pinceti model were modeled and simulated using the ATPDraw software and the performance of those model were studied with several manufacturer surge arresters. The MATLAB software was used to obtain the results on the impulse voltage signal of the SPDs. Both models' performances are being investigated, and MATLAB has been used to examine the voltage data. According to the findings, the IEEE model is more effective for usage as a lightning arrester in MV networks.

View
Thumbnail Image
Publication

Determination of Protective Potential in the Zero Charge Corrosion Protection System

2020-11-24 , Shaiful Rizam Shamsudin , Wardan Rajaselan , Azmi Rahmat , Mohd Nazree Derman , Mohd Nazree Derman , Mohd Fitri M.W.

Zero charge corrosion protection, ZCCP, is a new invention in the field of corrosion protection. It applies alternating current, AC, mode while the protective potential to ensure that the metal exposed in the corrosive environment still does not exist in any of the previous works of literature. The study was conducted by the voltage scanning within corrosion potential, Ecorr, and polarized potential, Eimpressed, using potentiostat. It was carried out by examining the behavior of the current flow in the circuit. The experimental results found that the protective potential for maximum protection in the ZCCP system is 0 mV. By keeping the AC metal potential at 0 mV, the surface will not acquire any charges, hence the corrosion reaction will be inhibited.

View
Thumbnail Image
Publication

The efficiency of Zero Charge Corrosion Protection on pure Mg by Planned Interval Test

2020-11-24 , Shaiful Rizam Shamsudin , Sanusi M.S. , Wardan R. , Azmi Rahmat , Mohd Nazree Derman

The concept of zero charge potential (Epzc) is manipulated to eliminates the effect of the electric double layer in order to mitigate the corrosion reactions through the zero-charge corrosion protection (ZCCP) method. The efficiency of the ZCCP method was examined by planned intervals test on pure Mg metal in 3.5% NaCl solution. The test results showed that the tendency of both liquid corrosiveness and metal corrodibility are decreased from -1562.7mm/yr (Eocp) to -98.2mm/yr (Epzc). ZCCP technique was succeeded by corrosion protection efficiency of pure Mg which was recorded between 93 to 96% in 3.5%) NaCl solution.

View
Thumbnail Image
Publication

Root cause analysis on manufacturing defects in brass oxygen valves

2023-05-01 , Wan Mohd Haqqi Wan Ahmad , Shaiful Rizam Shamsudin , Salleh S.H.M. , Mohd Rafi Adzman , Rajaselan Wardan , Mahalaksmi Gunasilan

Brass valves are widely used in oxygen gas cylinder systems to regulate pressure and ensure safe operation. The production methods for brass valves include hot forging (700 °C), stress-relieving (300 °C), shot blasting, machining, and selective chrome plating on the external surface. Pneumatic testing at 400 bar has detected more than 10 % of the product production was found to have signs of leakage, and the most severe was when there were visible hairline cracks on the inner wall. Therefore, several tests to investigate valve failure were conducted to identify the root cause of the failure using a series of microscopic methods on the failed sample as well as the as-received brass billet. The study found that hairline cracks in brass valves were most likely caused by internal dross originating from the billet that was not properly removed during the casting process. The presence of dross in the billet manufacturing stage was identified as the primary reason for valve failure. Hot forging and other manufacturing techniques were found to be insufficient to eliminate the formation of dross, leading to a deterioration in the mechanical properties of the valves. In order to overcome this issue, flux can be added to the molten brass to help remove impurities and reduce the formation of dross. As a result, the mechanical properties of the final product deteriorated even though it had gone through the forging process.

View