Research Article
Development of Superhydrophobic Silica Derived from Agricultural Biomass Waste as an Eco-Friendly Corrosion Inhibitor via Ultrasonic Dip-Coating
@INPROCEEDINGS{10.4108/eai.16-9-2025.2361108, author={Lisnawaty Simatupang and Ricky Andi Syahputra and Elfrida Ginting and Maryati Doloksaribu and Binsar Maruli Tua Pakpahan and Fransiskus Hottua Malau and Winri Imanuela Sihombing and Carlos Rewandesno Sitorus}, title={Development of Superhydrophobic Silica Derived from Agricultural Biomass Waste as an Eco-Friendly Corrosion Inhibitor via Ultrasonic Dip-Coating}, proceedings={Proceedings of the 7th International Conference on Innovation in Education, Science, and Culture, ICIESC 2025, 16 September 2025, Medan, Indonesia}, publisher={EAI}, proceedings_a={ICIESC}, year={2026}, month={3}, keywords={superhydrophobic silica biomass waste corrosion inhibitor ultrasonic dip-coating sol-gel synthesis}, doi={10.4108/eai.16-9-2025.2361108} }- Lisnawaty Simatupang
Ricky Andi Syahputra
Elfrida Ginting
Maryati Doloksaribu
Binsar Maruli Tua Pakpahan
Fransiskus Hottua Malau
Winri Imanuela Sihombing
Carlos Rewandesno Sitorus
Year: 2026
Development of Superhydrophobic Silica Derived from Agricultural Biomass Waste as an Eco-Friendly Corrosion Inhibitor via Ultrasonic Dip-Coating
ICIESC
EAI
DOI: 10.4108/eai.16-9-2025.2361108
Abstract
Corrosion of metal components poses a persistent challenge in various industries due to moisture and aggressive environments. This study presents the development of superhydrophobic silica coatings derived from agricultural biomass waste (rice husk, corncob, and sugarcane bagasse) as eco-friendly corrosion inhibitors for mild steel. Silica was extracted via a sol–gel method after acid–alkali treatment and thermal calcination, then modified with trimethylchlorosilane (TMCS) to enhance hydrophobicity. The functionalized silica was applied onto steel substrates through ultrasonic dip-coating. Characterization using FTIR and XRD confirmed silanol functionalization and the amorphous structure of the silica. The coatings exhibited water contact angles above 150° and sliding angles below 10°, confirming superhydrophobicity. Corrosion tests in 15% HCl and 3.5% NaCl media showed a significant reduction in corrosion rate, achieving up to 92.8% inhibition efficiency at 5.0% silica concentration. These results suggest that biomass-derived silica provides a sustainable and high-performance solution for corrosion-resistant coatings.
