Microbiologically influenced corrosion of mild steel and stainless steel by pseudomonas aeruginosa in enriched artificial sea water / Ahmad Hisham Mohamed Aris

Corrosion damage in the form of pitting corrosion was observed on both mild steel ASTM 283-D and stainless steel 304 after being exposed to Pseudomonas aeruginosa-inoculated enriched artificial seawater (EASW) after 7 days and 14 days exposure period. To determine the difference in corrosion severit...

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Main Author:	Mohamed Aris, Ahmad Hisham
Format:	Thesis
Language:	English
Published:	2015
Subjects:	Microbial ecology
Online Access:	https://ir.uitm.edu.my/id/eprint/15768/1/TM_AHMAD%20HISHAM%20MOHAMED%20ARIS%20AS%2015_5.PDF
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id	my-uitm-ir.15768
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spelling	my-uitm-ir.157682022-03-10T00:58:38Z Microbiologically influenced corrosion of mild steel and stainless steel by pseudomonas aeruginosa in enriched artificial sea water / Ahmad Hisham Mohamed Aris 2015 Mohamed Aris, Ahmad Hisham Microbial ecology Water. Aquatic microbiology Corrosion damage in the form of pitting corrosion was observed on both mild steel ASTM 283-D and stainless steel 304 after being exposed to Pseudomonas aeruginosa-inoculated enriched artificial seawater (EASW) after 7 days and 14 days exposure period. To determine the difference in corrosion severity between these two steels, characterization of the samples were carried out with the following instruments; AUTOLAB Potentiostat, Field Emission Scanning Electron Microscope (FESEM), Energy Dispersive Spectrum (EDS), Infinite Focus Microscope (IFM) and Surface Roughness Profiler. Corrosion phenomenon was confirmed by the increase of corrosion rate and surface roughness values. Imaging of the pitting corrosion with FESEM and IFM together with elemental composition of the pitting with EDS confirmed the form of corrosion that took place on both steels in the presence of the bacterium. The link between biofilm and pitting corrosion was established with biofilm imaging by IFM. Determination of pitting shape by using its volume and projected area were considered to be more accurate than with pitting depth and width. In the case of control samples in sterile EASW, uniform corrosion was noticeable on mild steel but was not observed on stainless steel, which reinforced the fact that its passive chromium oxide film played a crucial role in corrosion prevention. The study revealed that pitting corrosion on mild steel was found to be more severe than those on stainless steel since its propagation in the vertical direction can cause earlier perforation of the base steel. 2015 Thesis https://ir.uitm.edu.my/id/eprint/15768/ https://ir.uitm.edu.my/id/eprint/15768/1/TM_AHMAD%20HISHAM%20MOHAMED%20ARIS%20AS%2015_5.PDF text en public mphil masters Universiti Teknologi MARA Faculty of Applied Science
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
topic	Microbial ecology Microbial ecology
spellingShingle	Microbial ecology Microbial ecology Mohamed Aris, Ahmad Hisham Microbiologically influenced corrosion of mild steel and stainless steel by pseudomonas aeruginosa in enriched artificial sea water / Ahmad Hisham Mohamed Aris
description	Corrosion damage in the form of pitting corrosion was observed on both mild steel ASTM 283-D and stainless steel 304 after being exposed to Pseudomonas aeruginosa-inoculated enriched artificial seawater (EASW) after 7 days and 14 days exposure period. To determine the difference in corrosion severity between these two steels, characterization of the samples were carried out with the following instruments; AUTOLAB Potentiostat, Field Emission Scanning Electron Microscope (FESEM), Energy Dispersive Spectrum (EDS), Infinite Focus Microscope (IFM) and Surface Roughness Profiler. Corrosion phenomenon was confirmed by the increase of corrosion rate and surface roughness values. Imaging of the pitting corrosion with FESEM and IFM together with elemental composition of the pitting with EDS confirmed the form of corrosion that took place on both steels in the presence of the bacterium. The link between biofilm and pitting corrosion was established with biofilm imaging by IFM. Determination of pitting shape by using its volume and projected area were considered to be more accurate than with pitting depth and width. In the case of control samples in sterile EASW, uniform corrosion was noticeable on mild steel but was not observed on stainless steel, which reinforced the fact that its passive chromium oxide film played a crucial role in corrosion prevention. The study revealed that pitting corrosion on mild steel was found to be more severe than those on stainless steel since its propagation in the vertical direction can cause earlier perforation of the base steel.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Mohamed Aris, Ahmad Hisham
author_facet	Mohamed Aris, Ahmad Hisham
author_sort	Mohamed Aris, Ahmad Hisham
title	Microbiologically influenced corrosion of mild steel and stainless steel by pseudomonas aeruginosa in enriched artificial sea water / Ahmad Hisham Mohamed Aris
title_short	Microbiologically influenced corrosion of mild steel and stainless steel by pseudomonas aeruginosa in enriched artificial sea water / Ahmad Hisham Mohamed Aris
title_full	Microbiologically influenced corrosion of mild steel and stainless steel by pseudomonas aeruginosa in enriched artificial sea water / Ahmad Hisham Mohamed Aris
title_fullStr	Microbiologically influenced corrosion of mild steel and stainless steel by pseudomonas aeruginosa in enriched artificial sea water / Ahmad Hisham Mohamed Aris
title_full_unstemmed	Microbiologically influenced corrosion of mild steel and stainless steel by pseudomonas aeruginosa in enriched artificial sea water / Ahmad Hisham Mohamed Aris
title_sort	microbiologically influenced corrosion of mild steel and stainless steel by pseudomonas aeruginosa in enriched artificial sea water / ahmad hisham mohamed aris
granting_institution	Universiti Teknologi MARA
granting_department	Faculty of Applied Science
publishDate	2015
url	https://ir.uitm.edu.my/id/eprint/15768/1/TM_AHMAD%20HISHAM%20MOHAMED%20ARIS%20AS%2015_5.PDF
_version_	1783733448503984128

Microbiologically influenced corrosion of mild steel and stainless steel by pseudomonas aeruginosa in enriched artificial sea water / Ahmad Hisham Mohamed Aris

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