Citation

Mohamad Arifin, Nurliyana and Saravanan, Kesahvanveraragu and Mhd Noor, Ervina Efzan (2024) Naphthenic Acid Corrosion Mitigation: The Role of Niobium in Low-Carbon Steel. Materials, 17 (13). p. 3372. ISSN 1996-1944

Text materials-17-03372-v3.pdf - Published Version Restricted to Repository staff only Download (2MB)

Abstract

Naphthenic acid corrosion is a well-recognized factor contributing to corrosion in the construction of offshore industry pipelines. To mitigate the corrosive effects, minor quantities of alloying elements are introduced into the steel. This research specifically explores the corrosion effects arising from immersing low-carbon steel, specifically A333 Grade 6, in a naphthenic acid solution. Various weight percentages of niobium were incorporated, and the resulting properties were observed. It was noted that the addition of 2% niobium in low-carbon steel exhibited the least mass loss and a lower corrosion rate after a 12 h immersion in naphthenic acid. Microstructural analysis using scanning electron microscopy (SEM) revealed small white particles, indicating the presence of oil sediment residue, along with corrosion pits. Following the addition of 2% niobium, the occurrence of corrosion pits markedly decreased, and only minor voids were observed. Additionally, the chemical composition analysis using energy-dispersive X-Ray analysis (EDX) showed that the black spot exhibited the highest percentage of carbon, resembling high corrosion attack. Meanwhile, the whitish regions with low carbon content indicated the lowest corrosion attack. The results demonstrated that the addition of 2% niobium yielded optimal properties for justifying corrosion effects. Therefore, low-carbon steel with a 2% niobium addition can be regarded as a superior corrosion-resistant material for offshore platform pipeline applications.

Item Type:	Article
Uncontrolled Keywords:	pipeline steel; corrosion; low-carbon steel; reinforcement of niobium; corrosion rate; microstructural; chemical composition; naphthenic acid
Subjects:	T Technology > TP Chemical technology
Divisions:	Faculty of Engineering and Technology (FET)
Depositing User:	Ms Nurul Iqtiani Ahmad
Date Deposited:	01 Aug 2024 06:32
Last Modified:	01 Aug 2024 06:33
URII:	http://shdl.mmu.edu.my/id/eprint/12720

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