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All Journal Journal of Mechanical Engineering, Science, and Innovation
Hendriani, Maulidia
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Control & Systems Engineering Energy Engineering Mechanical Engineering

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Corrosion-Induced Failure Mechanisms in Bio-Nano Hybrid Coatings for Structural Applications Hendriani, Maulidia; Andoko, Andoko; Prasetya, Riduwan; Zakaria, Yahya
Journal of Mechanical Engineering, Science, and Innovation Vol 6, No 1 (2026): (April)(On Progress)
Publisher : Institut Teknologi Adhi Tama Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2026.v6i1.8625

Abstract

This study examines the corrosion resistance performance and failure mechanisms of a hybrid coating system based on castor oil and nano-SiO₂ with three particle size variations (20 nm, 100 nm, and 500 nm) applied to ASTM A36 steel. We compared uncoated samples with three coating variants to evaluate the effect of nano-SiO₂ size on corrosion resistance and damage development. Coating resistance was tested using potentiodynamic polarization, FTIR analysis, corrosion morphology characterization, and coating thickness measurements. Compared to uncoated steel, the formulation with 100 nm nano-SiO₂ provided the greatest improvement, with a three-order decrease in corrosion current density (icorr = 1.33×10⁻⁸ A/cm²) and a shift in corrosion potential toward a more positive direction, accompanied by stable surface morphology and minimal chemical changes. This effectiveness is achieved through homogeneous particle dispersion, which produces a dense barrier structure and tortuous diffusion pathways without a significant increase in thickness. Failure mechanism analysis shows that small particle sizes (20 nm) trigger porous barrier breakdown due to nano-silica aggregation, while large particles (500 nm) cause coating cracking and localized pitting due to sedimentation and excessive thickness. In contrast, the 100 nm size stabilizes the passive film and suppresses pit initiation. These findings confirm that controlling the size and dispersion of nano-SiO₂ not only improves corrosion resistance but also determines the dominant failure pathway in coatings. This research contributes to the development of sustainable bio-nano coatings for structural applications by highlighting the importance of microstructural reinforcement and understanding failure mechanisms in designing high-resistance coating systems.
Comparative Structural Performance Evaluation of Modified Stopper Mounting Designs in Conveyor Systems Using Finite Element Simulation Hendriani, Maulidia; Andoko, Andoko; Prasetya, Riduwan; Zakaria, Yahya
Journal of Mechanical Engineering, Science, and Innovation Vol 6, No 1 (2026): (April)(On Progress)
Publisher : Institut Teknologi Adhi Tama Surabaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2026.v6i1.8501

Abstract

This study investigates the structural performance of three stopper mounting designs for conveyor systems using finite element simulations in ANSYS Workbench. The analysis was conducted using a static structural method, where a vertical downward load of 103.43 N converted from the total weight of the stopper was applied to the structure, and fixed support boundary conditions were assigned at the mounting base. We compared the original design with two modified versions, including one reinforced with stiffening ribs. We evaluated each model under static loads by measuring total deformation, equivalent stress, elastic strain, and safety factor. Compared to the original design, MD 1 reduced total deformation by 88.42%, elastic strain by 53.04%, and equivalent stress by 30.72%, while increasing the safety factor by 0.94%. These improvements were achieved without significantly increasing material usage. The addition of stiffening ribs effectively directed internal forces, stabilized stress zones, and enhanced structural resilience. The original design, while functional, exhibited high deformation and uneven stress distribution that limited its suitability for precision-dependent operations. Reinforcing the geometry proved essential in achieving better mechanical performance and durability. This validates the use of local structural enhancement as a key strategy in mechanical design. The findings contribute to automation system development by highlighting the importance of local reinforcement in precision-oriented automation components.
Co-Authors Andoko Andoko, Andoko Prasetya, Riduwan Yahya Zakaria