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Enhancement of Corrosion Resistance of Carbon Steel Using Gas Nitriding Technology

Carbon steels are the most extensively used materials throughout oil and gas industry especially for oil and gas pipeline transportation as the steel is low cost and easy to install. However, on exposing to various kinds of corrosive environment, the steels are susceptible to corrosion. This researc...

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Main Author: Ahmad, Lina Kamilia
Format: Final Year Project
Language:English
Published: IRC 2018
Online Access:http://utpedia.utp.edu.my/20083/1/Dissertation_LINA%20KAMILIA%20AHMAD%20%2820944%29.pdf
http://utpedia.utp.edu.my/20083/
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spelling my-utp-utpedia.200832019-12-16T10:03:28Z http://utpedia.utp.edu.my/20083/ Enhancement of Corrosion Resistance of Carbon Steel Using Gas Nitriding Technology Ahmad, Lina Kamilia Carbon steels are the most extensively used materials throughout oil and gas industry especially for oil and gas pipeline transportation as the steel is low cost and easy to install. However, on exposing to various kinds of corrosive environment, the steels are susceptible to corrosion. This research aims to enhance corrosion resistance, surface hardness as well as examines the microstructure of as-received and nitrided ASTM A106 carbon steel pipe by developing the nitrided surface harden layer using gas nitriding process. High-temperature gas nitriding was employed to treat the steels at 1150 ̊C for various nitriding durations which two until five hours using a constant flow rate of nitrogen gas. Corrosion performance of the samples were tested by using immersion test while Vickers hardness test was used to evaluate the steels surface hardness. Surface characterization techniques such as optical microscopy, Scanning Electron Microscope (SEM), Energy-Dispersive X-ray Spectroscopy (EDX) and X- ray Diffraction (XRD) were also employed to investigate the microstructure, morphology, and compositions of gas nitriding carbon steel. Result obtained shows that the corrosion rate of five hours nitrided carbon steel when compared to the as- received steel has reduced by 22.74% which is from 1.11 mm/yr to 0.86 mm/yr. The surface hardness is approximately three times improved from the untreated sample which the value from 200 HV increases until 600 HV. Meanwhile, the development of the nitriding layer at five hours’ treatment is 171 μm which 13 times thicker than untreated steel that has 13μm thickness. These analyses indicate that nitrided steels provided better corrosion resistance in terms of corrosion rate compared to as-received due to the presence of nitrogen and the denser compound layer at the surface of the steel. The results proved by prolonging the nitriding time diffused more nitrogen into the steel, subsequently, improving the steel’s hardness. IRC 2018-09 Final Year Project NonPeerReviewed application/pdf en http://utpedia.utp.edu.my/20083/1/Dissertation_LINA%20KAMILIA%20AHMAD%20%2820944%29.pdf Ahmad, Lina Kamilia (2018) Enhancement of Corrosion Resistance of Carbon Steel Using Gas Nitriding Technology. IRC, Universiti Teknologi PETRONAS. (Submitted)
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Electronic and Digitized Intellectual Asset
url_provider http://utpedia.utp.edu.my/
language English
description Carbon steels are the most extensively used materials throughout oil and gas industry especially for oil and gas pipeline transportation as the steel is low cost and easy to install. However, on exposing to various kinds of corrosive environment, the steels are susceptible to corrosion. This research aims to enhance corrosion resistance, surface hardness as well as examines the microstructure of as-received and nitrided ASTM A106 carbon steel pipe by developing the nitrided surface harden layer using gas nitriding process. High-temperature gas nitriding was employed to treat the steels at 1150 ̊C for various nitriding durations which two until five hours using a constant flow rate of nitrogen gas. Corrosion performance of the samples were tested by using immersion test while Vickers hardness test was used to evaluate the steels surface hardness. Surface characterization techniques such as optical microscopy, Scanning Electron Microscope (SEM), Energy-Dispersive X-ray Spectroscopy (EDX) and X- ray Diffraction (XRD) were also employed to investigate the microstructure, morphology, and compositions of gas nitriding carbon steel. Result obtained shows that the corrosion rate of five hours nitrided carbon steel when compared to the as- received steel has reduced by 22.74% which is from 1.11 mm/yr to 0.86 mm/yr. The surface hardness is approximately three times improved from the untreated sample which the value from 200 HV increases until 600 HV. Meanwhile, the development of the nitriding layer at five hours’ treatment is 171 μm which 13 times thicker than untreated steel that has 13μm thickness. These analyses indicate that nitrided steels provided better corrosion resistance in terms of corrosion rate compared to as-received due to the presence of nitrogen and the denser compound layer at the surface of the steel. The results proved by prolonging the nitriding time diffused more nitrogen into the steel, subsequently, improving the steel’s hardness.
format Final Year Project
author Ahmad, Lina Kamilia
spellingShingle Ahmad, Lina Kamilia
Enhancement of Corrosion Resistance of Carbon Steel Using Gas Nitriding Technology
author_facet Ahmad, Lina Kamilia
author_sort Ahmad, Lina Kamilia
title Enhancement of Corrosion Resistance of Carbon Steel Using Gas Nitriding Technology
title_short Enhancement of Corrosion Resistance of Carbon Steel Using Gas Nitriding Technology
title_full Enhancement of Corrosion Resistance of Carbon Steel Using Gas Nitriding Technology
title_fullStr Enhancement of Corrosion Resistance of Carbon Steel Using Gas Nitriding Technology
title_full_unstemmed Enhancement of Corrosion Resistance of Carbon Steel Using Gas Nitriding Technology
title_sort enhancement of corrosion resistance of carbon steel using gas nitriding technology
publisher IRC
publishDate 2018
url http://utpedia.utp.edu.my/20083/1/Dissertation_LINA%20KAMILIA%20AHMAD%20%2820944%29.pdf
http://utpedia.utp.edu.my/20083/
_version_ 1739832712154316800
score 13.211869

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