Dissertations / Theses: 'Microbiologically influenced corrosion (MIC)'

1

Xu, Dake. "Microbiologically Influenced Corrosion (MIC) Mechanisms and Mitigation." Ohio University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1374856931.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Smith, Peter James. "A predictive model for microbiologically influenced corrosion (MIC) in sub-sea production pipelines." Thesis, University of Newcastle Upon Tyne, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.545774.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Hu, An. "Investigation of sulfate-reducing bacteria growth behavior for the mitigation of microbiologically influenced corrosion (MIC)." Ohio : Ohio University, 2004. http://www.ohiolink.edu/etd/view.cgi?ohiou1176404403.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Jhobalia, Chintan M. "The role of a biofilm and its characteristics in Microbiologically Influenced Corrosion of steel." Ohio University / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1176405846.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Fu, Wenjie. "Investigation of Type II of Microbiologically Influenced Corrosion (MIC) Mechanism and Mitigation of MIC Using Novel Green Biocide Cocktails." Ohio University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1374086997.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Li, Yingchao. "Investigation of Mechanisms of Microbiologically Influenced Corrosion and Mitigation of Field Biofilm Consortia." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1436306238.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Zhao, Kaili. "Investigation of Microbiologically Influenced Corrosion (MIC) and Biocide Treatment in Anaerobic Salt Water and Development of A Mechanistic MIC Model." View abstract, 2008. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3340311.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Wen, Jie. "Investigation of Microbiologically Influenced Corrosion (MIC) by Sulfate Reducing Bacteria (SRB) Biofilms and Its Mitigation Using Enhanced Biocides." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou151074099127686.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Miller, Robert B. II. "INVESTIGATING MICROBIOLOGICALLY INFLUENCED CORROSION USING THE ZERO-RESISTANCE AMMETRY TECHNIQUE IN A SPLIT CELL FORMAT." University of Akron / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=akron15743759679032.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Porter, A. C. "Microbiologically influenced corrosion in Aberdeen Harbour." Thesis, University of Aberdeen, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.590988.

Full text

Abstract:

This project was developed in partnership with Aberdeen Harbour Board to assess the likelihood of MIC occurrence on steel pilings in Aberdeen Harbour, and to predict the effect of various environmental variables on this process. The literature review (Chapter 1) describes the corrosion process and presents the evidence for the role of microorganisms in aggressive forms of localised corrosion. Chapter 3 details the development of general methods that were then used in subsequent experimental chapters. Data from various surveys carried out in Aberdeen Harbour were analysed in Chapter 4 for pertinent information. This information was used to plan microcosm experiments (reported in chapter 5) designed to mimic field conditions in Aberdeen Harbour. These microcosm experiments were initially carried out over a range of temperatures (10⁰C to 30⁰C) and corrosion rate increased as temperature increased. The initial microcosm experiment demonstrated that carbon addition had little effect on corrosion rate, whereas N & P addition increased corrosion rates, both biotically and abiotically. The second microcosm experiment, reported in Chapter 6, demonstrated that the addition of a sediment bacterial inoculum did not affect bacterial population densities or rate of steel weight loss, suggesting that an inoculum from the water column alone would suffice to produce a biofilm containing SRB and thiobacilli that may affect steel corrosion. The third microcosm experiment presented in Chapter 7, demonstrated that although increased light intensity caused an increase in the rate of corrosion, the effect was abiotic, rather than biotic. The field experiment carried out in Aberdeen Harbour, and reported in Chapter 8, showed that in situ corrosion processes were similar to those observed in the laboratory. The findings from this research project can be used by Aberdeen Harbour Board to develop strategies that will help predict the occurrence, and severity, of MIC within the harbour.

APA, Harvard, Vancouver, ISO, and other styles

11

Machuca, Suarez Laura Lizeth. "Microbiologically influenced corrosion of common alloys used for subsea applications." Thesis, Curtin University, 2012. http://hdl.handle.net/20.500.11937/258.

Full text

Abstract:

This project has investigated the susceptibility of offshore construction steels to microbiologically influenced corrosion in seawater, elucidating the effects of temperature, oxygen pressure, exposure time and alloy material composition on biological activity and the corrosion resistance of the selected materials in seawater. Results from this research form the foundations of essential guidelines for design criteria, risk assessment and asset integrity management based on materials selection and preservation treatments in the application to subsea equipment.

APA, Harvard, Vancouver, ISO, and other styles

12

Wang, Hua. "Effects Of Microbial Attachment And Biofilm Formation On Microbiologically Influenced Corrosion." University of Akron / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=akron1396543805.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Davis, Caroline Ann. "Investigating the impact of microbial interactions with geologic media on geophysical properties." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Davis_2009_09007dcc807406c5.pdf.

Full text

Abstract:

Thesis (Ph. D.)--Missouri University of Science and Technology, 2009.
Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed August 10, 2009) Includes bibliographical references.

APA, Harvard, Vancouver, ISO, and other styles

14

Sutton, Jeremy. "Microbially influenced corrosion (MIC) of steels in mono- and hyper-baric environments." Thesis, Robert Gordon University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241029.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Cai, Hong. "Microbiologically influenced corrosion and titanate conversion coatings on aluminum alloy 2024-T3 /." View online ; access limited to URI, 2006. http://0-wwwlib.umi.com.helin.uri.edu/dissertations/dlnow/3225314.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Chen, Yajie. "Microbiologically influenced corrosion of carbon steel caused by a sulfate reducing bacterium." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1468357213.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Howell, William R. N. "An analysis of possible microbiologically influenced crevice corrosion of 316 stainless steel in a seawater environment." Thesis, Monterey, California. Naval Postgraduate School, 1996. http://hdl.handle.net/10945/7939.

Full text

Abstract:

An analysis was conducted of 316 Stainless Steel components which exhibited an unusual degree of crevice corrosion after exposure to seawater for approximately one year. After conducting research into the possible chemical and microbiological mechanisms for the corrosion, a metallurgical and microscopic examination of the components was performed. Results of these examinations indicated that the corrosion observed was probably the result of an interaction between the Gallionella aerobic iron bacteria and the anaerobic sulfate reducing bacteria Desulfovibrio and Desulfomaculum

APA, Harvard, Vancouver, ISO, and other styles

18

Howell, William R. N. (Robert Newton). "An analysis of possible microbiologically influenced crevice corrosion of 316 stainless steel in a seawater environment." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/39622.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Jia, Ru. "Mechanisms of Microbiologically Influenced Corrosion Caused by Corrosive Biofilms and its Mitigation Using Enhanced Biocide Treatment." Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1541425677541433.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Salgar, Chaparro Silvia Juliana. "Understanding of Microbiologically Influenced Corrosion in Carbon Steel Pipelines: Towards Developing a Methodology to Assess Probability of Failure." Thesis, Curtin University, 2020. http://hdl.handle.net/20.500.11937/81959.

Full text

Abstract:

This dissertation evaluated critical aspects of microbiologically influenced corrosion (MIC) and generated valuable information for the understanding and management of this corrosion threat. The main outcomes include a better understanding of the preservation requirements for field samples to obtain accurate results; an innovative approach for MIC assessment that consists of the identification of total and active microbial communities; knowledge of the effect that environmental and operational conditions can have on microbial communities and MIC.

APA, Harvard, Vancouver, ISO, and other styles

21

Kuklinski, Andrzej [Verfasser], and Wolfgang [Akademischer Betreuer] Sand. "Development of extracellular polymeric substance-derived protective films against microbiologically influenced corrosion by Desulfovibrio vulgaris / Andrzej Kuklinski ; Betreuer: Wolfgang Sand." Duisburg, 2017. http://d-nb.info/1132510546/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Romаnszki, L., M. Mohos, J. Telegdi, and L. Nyikos. "Contact Angle Measurement is an Efficient Tool for the Characterization of Corrosion Pro-tection Nanolayers on Copper Alloys and Stainless Steel." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35254.

Full text

Abstract:

With the advent of the nano-era, a pronounced interest in the nanolayers has emerged. The develop-ment of more and more sophisticated measurement devices and techniques made possible the visualiza-tion, characterization and investigation of nanolayers. However, there exists a variety of simple, old means which should not be despised either. In this work, the use of contact angle measurement as a simple, fast, inexpensive and accessible tool for the study of surfaces with and without nanolayers is demonstrated. Furthermore, it is evidenced that in contrast to its simplicity, contact angle measurement can address sur-prisingly complex questions and give proper answers to these. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35254

APA, Harvard, Vancouver, ISO, and other styles

23

Lin, Hsin-Yi. "Short term observations of in vitro biocorrosion of two commonly used implant alloys." Diss., Mississippi State : Mississippi State University, 2002. http://library.msstate.edu/etd/show.asp?etd=etd-08202002-105908.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Yang, Dongqing. "Mechanism and Mitigation of Biocorrosion by Nitrate Reducing Pseudomonas aeruginosa against Stainless Steel." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1479224328510291.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Liu, Jialin. "Mechanism of Biocorrosion Caused by Biofilms and Its Mitigation." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1511966633638842.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Cai, Weizhen. "Mechanisms of Corrosion Caused by Anaerobic Biofilms and Its Mitigation Using a Biocide Enhanced by D-Amino Acids." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1505752144462679.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Lindenberger, Amy L. "D-Tryptophan as a Biocide Enhancer for Desulfovibrio vulgaris Biofilm Mitigation andBiocorrosion of Carbon Steel by Nitrate-Reducing Pseudomonas aeruginosa." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1417296479.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Nasser, Badoor. "Characterization of microbiologically influenced corrosion in pipelines by using metagenomics." Diss., 2019. http://hdl.handle.net/10754/652824.

Full text

Abstract:

Corrosion in pipelines and reservoir tanks in oil plants is a serious problem in the energy industries around the world because it causes a huge economic loss due to not only frequent replacements of the parts of pipelines and tanks but also potential damage of the entire fields of crude oil. Previous studies have revealed that corrosions are generated mainly by microbial activities and they are now called as Microbial Influenced Corrosion (MIC) or simply bio-corrosion. Bacterial species actually causing bio-corrosion is crucial for the suppression of the corrosion. To diagnose and give proper treatment to pipelines in industrial plants, it is essential to identify the bacterial species responsible for bio-corrosions. For attaining at this aim, I conducted an analysis of the microbial community at the corrosion sites in pipelines of oil plants, using the comparative metagenomic analysis along with bioinformatics and statistics. In this study, I collected and analyzed various bio-corrosion samples from four different oil fields. First, I collected samples from the seawater pipelines that are essential in the oil fields to maintain seawater injection system (field#1), and then I conducted the metagenomic analysis of these samples. The metagenomes obtained revealed that samples in both sites contain a wide range of bacterial taxa. However, the comparative analysis of the microbial community with statistics in the comparison between sites with corrosion and without corrosion revealed the presence of microorganisms whose abundances were significantly higher in sites with corrosion. Some of these microbes can be sulfate reducers and sulfur oxidizers of which are considered to be casual agents in recent bio-corrosion models. In addition to the seawater pipelines, I also collect samples from corrosion sites in oil pipelines at Field #2 and #3. My metagenomic analysis combined with statistics showed that several microorganisms are speculated to be very active at the corrosion sites in the oil pipeline. Although biological mechanisms of forming bio-corrosion in the oil pipelines still remain unclear, these microbial species are suggested to be some of the responsible bacteria for bio-corrosion in the oil pipelines. Besides seawater injection systems, groundwater injection systems are often used, especially in inland oil fields. Therefore, more detailed understanding of biocorrosion in the groundwater injection system is also required in oil industries. In the present studies, I then analyzed the microbial communities in pipelines in the oil field where groundwater is used as injection water (field #4). I collected samples from four different facilities in the field #4. Metagenome analysis revealed that microbial community structures were largely different even among samples from the same facility. Treatments such as biocide and demineralization at each location in the pipeline may affect the microbial communities independently. The results indicated that microbial inspection throughout the pipeline network is important to protect industrial plants from bio-corrosions. Identifying the bacterial species responsible to bio-corrosion, this study provides us with information on bacterial indicators that will be available to classify and diagnose bio-corrosions. Furthermore, these species may be available as biomarkers to detect the events of bio-corrosion at an early stage. Then, any appropriate care such as the appropriate choice of biocides can be taken immediately and appropriately. Thus, my study will provide a platform for obtaining microbial information related to bio-corrosion that enables us to obtain a practical approach to protect them from bio-corrosion.

APA, Harvard, Vancouver, ISO, and other styles

29

Hung, Fe Et, and 洪飛義. "The Research of Microbiologically Influenced Corrosion of Metals." Thesis, 1997. http://ndltd.ncl.edu.tw/handle/82115052356080281850.

Full text

Abstract:

碩士
國立屏東技術學院
機械工程技術研究所
85
The main purpose of this study is to investigate the MicrobiologicallyInfluenced Corrosion (MIC) of the compost system , especially including(1)to analysis the relationship between the temperature and humidity ofcompost system and MIC ,(2)to investigate the relationship between the microstructure of the alloy and MIC,in compost system.Based on the result , it was concluded that (1)Owing to the higher temperature and humidity of compost system from the beginning,the MIC of the present alloys is higher .(2)For the various heat-treatment ,the MIC rate of the present alloys in the compost system is 1)50-250mdd for 1020 hot-rolled plate ,2)5-25mdd for 1020 cold- rolled plate ,3)20-110mdd for sk2 hot-rolled plate ,and 4)3-14mdd for 304 SS cold-rolled plate .3)During the MIC processes , there are at least four kinds of Microbiological could influence the corrosion of the presentalloys .

APA, Harvard, Vancouver, ISO, and other styles

30

Pillay, Charlene. "Microbiologically influenced corrosion of steel coupons in stimulated systems : effects of additional nitrate sources." Thesis, 2012. http://hdl.handle.net/10413/10068.

Full text

Abstract:

Microbiologically Influenced Corrosion (MIC) is a process influenced by microbial presence and their metabolic activities. This study examined the microbial effects on metal corrosion under different environmental conditions with nutrient supplements. Experiments were conducted by inserting stainless steel 304 and mild steel coupons (2.5 x 2.5 cm²) into loam soil and a simulated seawater/sediment system with various nutrient conditions (sterilized, without supplement, 5 mM NaNO₃ or NH₄NO₃). Two mild and stainless steel coupons were removed monthly and the corrosion rate was evaluated based on the weight loss. Bacterial populations were enumerated using the most probable number (MPN) technique. The presence and adhesion of microbes on mild steel coupons were examined using Scanning Electron Microscopy (SEM). The extent of the corrosion process on the surface of the metal coupons were visualized by using the Stereo Microscope. The elemental composition of the corrosion products formed on the coupon surface were determined by Energy Dispersive X-Ray analyses. Isolation and identification of aerobic microorganisms were conducted and examined for its potential in either accelerating or inhibiting corrosion. The bacterial populations present on the mild steel surface were analyzed by fluorescent in situ hybridization. Denaturing gradient gel electrophoresis (DGGE) analyses of PCR-amplified 16S rDNA fragments were conducted to determine the microbial community complexity of the biofilm. Greater weight losses of mild steel in loam soil and the seawater/sediment system with NaNO₃ (48.86 mg/g and 19.96 mg/g of weight loss, respectively after 20 weeks) were observed with total heterotrophic bacterial population presented (106.695 MPN/ml and 0.11187 MPN/ml respectively) compared to the autoclaved control (7.17845 mg/g and 0.12082 mg/g of weight loss respectively). Supplementation of 5 mM NH₄NO₃ increased the total heterotrophic bacterial population and resulted in a decrease in weight loss measurements on the stainless steel coupons (211.4 MPN/ml with a 0.01 mg/g weight loss) after 20 weeks compared to the non-autoclaved loam soil and loam soil supplemented with NaNO₃ (139.2 MPN/ml and 134.9 MPN/ml respectively with no weight loss). SEM images of the mild steel coupons confirmed the presence and adherence of bacteria on the metal surface. Stereo microscopic images displayed reddish-brown deposits and pitting on the coupon surface. Isolation, identification and sequence analysis revealed that most microorganisms were the Bacillus species. This group of microorganisms are iron-oxidizing bacteria that could also promote the corrosion process. After 20 weeks of incubation, the total SRB cell counts were lower in samples supplemented with NaNO₃ in both loam soil and the seawater/sediment system. This study also indicated that the isolated aerobic microorganisms do play a role in the corrosion process in both stainless and mild steel. DGGE analysis revealed microbial diversity in the corrosion products especially those affiliated to the bacterial phyla Firmicutes and Gamma-Proteobacteria. Fluorescent in situ hybridization analysis allowed for an overall estimation of Eubacteria and sulphate-reducing bacteria present in the biofilm formed on the surface of mild steel. The current study indicates that the addition of nitrates did not significantly reduce the rates of corrosion of both mild and stainless steel. However, it does seem that environmental conditions did pose as an important factor in the corrosion process. Therefore, further studies need to be implemented to analyze the environmental type, microbial composition and optimization of the concentration of nitrates for possible mitigation of metal corrosion. To optimize MIC prevention and control, collaboration between engineers and microbiologists proves advantageous to develop an environmentally sound and potentially cost-effective approach to control corrosion.
Thesis (Ph.D.)-University of KwaZulu-Natal, Westville, 2012.

APA, Harvard, Vancouver, ISO, and other styles

31

Chien-HsunChen and 陳建勛. "Study on the Microbiologically Influenced Corrosion Behavior and Mechanism of Offshore Steel Plate S690Q." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/60466197328432876052.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Hung, Chien-Ken, and 洪健根. "Microbiologically Influenced Corrosion on A106 Carbon Steel in Water Cooling System of Thermal Power Plant." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/99514432729148987187.

Full text

Abstract:

碩士
國立中興大學
材料工程學研究所
91
The volume capacity of cooling water used in Taichung thermal power plant was about 300 m3. The amount of microorganism was increasing with increasing time and the microbiologically influenced corrosion (MIC) was also getting serious. Therefore, increasing the inhibitor concentration and/or adding some bactericide is a feasible method to control MIC. Various kinds of bacterial were found in the cooling water. In general, two categories including medium temperature germs and high temperature germs were separated. The corrosion characteristics were evaluated by potentiodynamic polarization tests, AC-impedance tests, corrosion potential trends, and SEM observation. It was found that the molybdate inhibitor and the bactericide was effective for medium temperature bacteria on controlling the corrosion of A106 carbon steel tubes but was not effective for high temperature bacteria. After corrosion test, the oxide film on carbon steel was degraded gradually with increasing corrosion time. With inhibitor and bactericide added, the oxide film was sustained in medium temperature bacteria environment but it was degraded and the steel was pitted in high temperature bacteria. Corrosion potentials of carbon steel were maintained at noble region for effective controls but shifted to active region for ineffective controls. Also, the much higher electrical resistance of germ layer, oxide layer, and double layer was found on effective controls and much lower on ineffective controls.

APA, Harvard, Vancouver, ISO, and other styles

33

Wang, Xiang. "Long-term under-deposit corrosion of carbon steel pipes in seawater environment." Thesis, 2017. http://hdl.handle.net/1959.13/1335468.

Full text

Abstract:

Research Doctorate - Doctor of Philosophy (PhD)
Water injection is the most commonly used method to increase the yield from oil and gas reservoirs. Seawater is typically the most convenient water source, and aquifer water and produced water (recovered from crude oil) or some combination is also used. The water injection pipelines (WIP) usually are carbon steel and often are many kilometres long. Because the insides of the pipes usually are not coated, the adverse operational environment means that internal corrosion is an on-going problem for many water injection pipelines. A corrosion problem of much concern in practice is the severe internal corrosion at the lower part of water injection pipelines in near-horizontal positions, in some cases, severe metal loss threatening the integrity of the pipelines. This type of corrosion is known variously as channelling corrosion, 6 o’clock corrosion, and bottom of the line corrosion. The examination of field observations suggests both under-deposit corrosion (UDC) and microbiologically influenced corrosion (MIC) are likely to be associated with the phenomenon. However, the mechanism of this phenomenon is still not fully understood. This thesis reports the observations of long-term corrosion of model steel pipes in a pilot laboratory study aimed at improving the understanding of development of channelling corrosion in offshore water injection pipelines. Half-pipe steel specimens were exposed continuously to stagnant and simulated deoxygenated seawater in the presence of mixed deposits for up to 365 days. The relative contributions of MIC, UDC and nitrate addition to corrosion development were investigated using four different test environments. The steel specimens were recovered after 12, 180 and 365 days of exposure and the changing surface topography was examined by Scanning Electron Microscopy (SEM) and optical microscope. The evolution of corrosion products were analysed by SEM and Energy-dispersive X-ray spectroscopy (EDS). The pit depths were measured by digital Linear Variable Differential Transformer (LVDT). These techniques present detailed graphical, morphological and chemical results of the corrosion process of mild steel in presence of deposits exposed to deoxygenated seawater. The observations show the synergistic effect of MIC and under-deposit corrosion led to severe localized corrosion. Nitrate addition caused most severe localized corrosion. This is linked to the enhanced MIC and the added nitrate plays the role of a source of critical nutrient. The progression of maximum pitting depth with increased exposure period was evaluated and a preliminary extreme value analysis of variability in maximum pit depth is presented. It is found that extreme value distribution examination shows Gumbel function is not appropriate to describe all the pit depth data. Frechet distribution is a better model to deal with the variability of the deepest pits. Finally, it is proposed that the continuous propagation of broad pits with the initiation of newer pits may explain the ultimate formation of channelling corrosion seen in practical water injection pipelines. Suggestions are provided for industrial practice on controlling rust deposition and MIC. The extreme value analysis of the pit depth data is also important for predicting failure probability due to pitting corrosion. In sum, the results in this thesis have implications for the corrosion management of water injection pipelines in the offshore oil industry.

APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic 'Microbiologically influenced corrosion (MIC)'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles