Impacts of temperature and coating pigment ratios on the corrosion rate of ss400 steel

https://doi.org/10.22146/teknosains.85518

Untung Budiarto(1), Ahmad Firdhaus(2*), Muhammad Luqman Hakim(3), Tuswan Tuswan(4), Fauzan Ammar Fata Yusuf(5)

(1) Department of Naval Architecture, Diponegoro University
(2) Department of Naval Architecture, Diponegoro University
(3) Department of Naval Architecture, Diponegoro University
(4) Department of Naval Architecture, Diponegoro University
(5) Department of Naval Architecture, Diponegoro University
(*) Corresponding Author

Abstract


Steel is the primary shipbuilding material; however, it erodes quickly. Adequate protection requires hard, durable, and adhesive coatings. This study examines how aluminium-graphite pigment and heat treatment affect epoxy-coated SS400 steel plate corrosion, adhesion, and coating resilience. This study used a 1:1 and 3:1 pigment ratio with 100°C and 150°C heat treatment. The coating layer was 250 μm thick and comprised 80% epoxy and 20% aluminum-graphite. The maximum adhesion strength, 19.62 MPa, was achieved with an aluminium-graphite pigment ratio of 1:1 and 100°C heat treatment. The top coating resistance was 6.86 Joules under identical conditions. The lowest corrosion rate, 0.047 mmpy, was at a 3:1 aluminum-graphite ratio and 150°C heat treatment. This discovery has significant consequences for shipbuilding steel corrosion resistance.


Keywords


aluminum; graphite; corrosion; adhesion; coatings; impact; heat treatment

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DOI: https://doi.org/10.22146/teknosains.85518

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