Corrosion rate of steel radiator components coated with keruing oleoresin

• A. Wahyudianto¹, S. Petrus¹, Merpatih¹, Triyono², H. Tandilittin¹, D.M. Salam³ and A. Fernandes⁴

¹ Politeknik Negeri Samarinda, Jl. DR Ciptomangunkusumo, Kampus Gunung Lipan, Samarinda, East Kalimantan, 75131, Indonesia
² Mechanical Engineering Department, Universitas Sebelas Maret, Surakarta, 57126, Indonesia
³ Research Center for Biomass and Bioproducts, National Research and Innovation Agency, Jl. Raya Puspiptek 60, Setu, Tangerang Selatan, Banten, 15314, Indonesia
⁴ Faculty of Forestry and Tropical Environment, Mulawarman University, Gunung Kelua Campus, Penajam Street, PO Box 1013, Samarinda, 75119, East Kalimantan, Indonesia

Abstract: Steel radiators are extensively utilized in automobiles due to their superior thermal conductivity. Nonetheless, they are susceptible to corrosion, which may result in diminished vehicle performance. This study sought to investigate the chemical constituents of steel radiator components and assess the corrosion inhibition properties of keruing oleoresin as a natural, environmentally friendly coating material. The study focused on identifying the chemical composition of steel radiator components using emission spectroscopy and evaluating the corrosion rate of these components, coated with keruing oleoresin, in distilled water conditions via electrochemical testing. The findings indicate that a 5% concentration of keruing oleoresin yields optimal corrosion inhibition, exhibiting an open circuit potential (OCP) of –0.154 V, a corrosion rate of 0.0002 mmpy, and an inhibition efficiency (IE) of 88.15%. The research illustrates the efficacy of keruing oleoresin as a natural corrosion inhibitor for steel radiators, aiding in the prevention of corrosion and the preservation of radiator performance.

Keywords: components of steel radiators; corrosion inhibitor; Dipterocarpus grandiflorus; oleoresin

Int. J. Corros. Scale Inhib., 2025, 14, no. 4, 2498-2507
doi: 10.17675/2305-6894-2025-14-4-42

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