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All Journal Jurnal Teknik Mesin International Journal of Innovation in Mechanical Engineering and Advanced Materials
Witanta, Maulana
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Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Natural Inhibitors for Corrosion Protection of 6061 Aluminum Alloy: A Review Witanta, Maulana; Arwati, I Gusti Ayu; Majlan, Edy Herianto
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 7, No 3 (2025): Article in Press
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v7i3.34713

Abstract

6061 aluminum alloys are widely used in automotive, marine, and aerospace industries, yet their high susceptibility to corrosion in acidic and chloride environments remains a challenge. Bio-based inhibitors from natural sources have emerged as sustainable alternatives to toxic synthetic chemicals. This review synthesizes findings from published studies on AA6061 alloys and composites, integrating evidence from Potentiodynamic Polarization (PDP), Electrochemical Impedance Spectroscopy (EIS), and Scanning Electron Microscopy (SEM). Cross-study evaluations show that inhibition efficiency depends on inhibitor type and mechanism. Reports indicate that Boswellia serrata provides only moderate protection (~70%) due to weak physiosorbed films that are unstable under flow, whereas Alocasia odora achieves higher efficiency (~94% in HCl) through chemisorption with cathodic inhibition. Aerva lanata demonstrates ~88% efficiency in chloride-based fiber-metal laminates via polyphenolic adsorption, while glutathione provides ~80% protection at 0.75 mM through multisite coordination. Pectin consistently achieves the highest efficiency (~95% in mild acidic media) by forming compact polymeric films that increase charge-transfer resistance and reduce double-layer capacitance. This synthesis indicates that chemisorption-based inhibitors (e.g., pectin, Alocasia) generally outperform physisorption-based systems (e.g., Boswellia) because they form stronger and more stable films. Reported studies highlight both advantages and limitations: natural inhibitors are effective and eco-friendly, but most evaluations remain short-term and laboratory-based. Key gaps include durability testing, advanced characterization (XPS, ToF-SIMS, Raman, AFM), galvanic effects in composites, and poor hydrodynamic stability of physisorption systems. Future work should explore hybrid strategies, synergistic multi-inhibitor approaches, and validation under real-sea conditions to enable scalable and industrially viable corrosion protection.
COMPARATIVE ANALYSIS OF THE EFFICIENCY OF HYBRID AND NON-HYBRID CARS: EFFECT OF WEIGHT, TORQUE AND PRICE Ikwal, Ahmad; Ginting, Ph.D, Dianta; Witanta, Maulana
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol 14, No 3 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v14i3.31388

Abstract

Fuel serves as the primary energy source for motor vehicles, enabling them to move. Although it has been the primary energy source for several centuries, Fuel has led to various environmental issues. One of its negative impacts is that, when burned, Fuel produces carbon dioxide (CO2), a significant contributor to global climate change. Currently, this petroleum-based energy is facing a crisis. Hybrid vehicles present a solution to address this petroleum energy crisis. Recently, hybrid cars have become popular in the modern automotive industry due to their numerous advantages, especially fuel efficiency and emissions. Hybrid vehicle technology combines conventional engine technology that uses Fuel with electric motor technology. This study provides a comprehensive comparative analysis between hybrid and non-hybrid cars, focusing on fuel efficiency, vehicle weight, torque, and price parameters. The aim is to assess the economic feasibility of hybrid vehicles compared to non-hybrid cars. The methodology used is a quantitative comparative study of several hybrid and non-hybrid car models within the same class. Performance data were systematically collected from reliable sources and analyzed under standard conditions, covering various price segments ranging from 600 million to 1.6 billion rupiahs. Statistical analysis was conducted to compare fuel efficiency, torque, and vehicle weight between the two types of cars and evaluate the economic implications of these differences. The study results indicate that hybrid cars achieve significantly higher fuel efficiency, averaging 18–22 km/l, compared to 10–14 km/l for non-hybrid models (p < 0.05). This efficiency increase persists despite increasing torque and vehicle weight, demonstrating that hybrid technology improves performance without sacrificing efficiency. Additionally, cost analysis suggests that although the initial price of hybrid cars is higher, fuel savings can offset the price difference in the long term. This research is expected to serve as a reference for consumers considering cost and energy efficiency when choosing hybrid and non-hybrid cars.
Co-Authors Edy Herianto Majlan, Edy Herianto Ginting, Dianta I Gusti Ayu Arwati Ikwal, Ahmad