Study and Modeling of the Localized Nature of Top of the Line Corrosion
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Ohio University / OhioLINK
2013
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1372426641 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-ohiou13724266412021-08-03T05:24:22Z Study and Modeling of the Localized Nature of Top of the Line Corrosion Singer, Marc Engineering Top of the line Localized corrosion H2S corrosion CO2 corrosion Water condensation The occurrence of localized corrosion in Top of the Line Corrosion (TLC) was investigated both in sweet (CO2-dominated) and sour (H2S-dominated) environments. The focus of the work was to understand the influence of the environmental parameters on localized corrosion at the top of the line in order to develop a narrative of the mechanism.The first part of this project presents the unique setup developed for the experimental work. Several large scale flow loops were used to perform the tests in order to recreate the field environments as closely as possible. The test section was designed using a carbon steel insert exposed to three different levels of cooling at the same time. This concept was quite successful in simulating realistic localized features. A series of long term exposure (one- to three-month) experiments was conducted to investigate the controlling parameters. The occurrence of localized corrosion could be very clearly correlated to the condensation rate, the gas temperature and the organic acid content. Important observations on the morphology of localized TLC features could be made, providing useful insight on the mechanisms involved.The second part of the study attempted to link the presence or absence of a large droplet on the steel surface to the extent of corrosion occurring underneath it. However, this was not successful as no clear relationship could be established with certainty. Instead, the water condensation rate was thought to control the corrosion and the overall aggressiveness of the environment (CO2, acetic acid).Finally, a modeling approach was proposed for the prediction of the localized attack in a top of the line corrosion scenario. The method was based on the observations made during the experimental part of the work and presented a mechanism for the prediction of the onset and propagation of localized corrosion. The FeCO3 saturation level played a key role in defining the overall corrosiveness of the condensed water, while the condensation rate controlled the degree of which localized attack is sustainable. 2013-09-26 English text Ohio University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1372426641 http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1372426641 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Engineering Top of the line Localized corrosion H2S corrosion CO2 corrosion Water condensation |
| spellingShingle |
Engineering Top of the line Localized corrosion H2S corrosion CO2 corrosion Water condensation Singer, Marc Study and Modeling of the Localized Nature of Top of the Line Corrosion |
| author |
Singer, Marc |
| author_facet |
Singer, Marc |
| author_sort |
Singer, Marc |
| title |
Study and Modeling of the Localized Nature of Top of the Line Corrosion |
| title_short |
Study and Modeling of the Localized Nature of Top of the Line Corrosion |
| title_full |
Study and Modeling of the Localized Nature of Top of the Line Corrosion |
| title_fullStr |
Study and Modeling of the Localized Nature of Top of the Line Corrosion |
| title_full_unstemmed |
Study and Modeling of the Localized Nature of Top of the Line Corrosion |
| title_sort |
study and modeling of the localized nature of top of the line corrosion |
| publisher |
Ohio University / OhioLINK |
| publishDate |
2013 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1372426641 |
| work_keys_str_mv |
AT singermarc studyandmodelingofthelocalizednatureoftopofthelinecorrosion |
| _version_ |
1719419781408358400 |