A study of corrosion behaviour of typical pump materials under sea water
Electrical submersible pumps are becoming increasingly popular in the oil and gas industry because of their ability to extract large amount of fluids deep underground. During the extraction process, the pump system is subjected to many corrosive elements. Corrosion is a very big economic probl...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2018
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/75455 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Electrical submersible pumps are becoming increasingly popular in the oil and gas industry
because of their ability to extract large amount of fluids deep underground. During the
extraction process, the pump system is subjected to many corrosive elements. Corrosion is a
very big economic problem in the oil and gas industry and it possess a serious risk to workers
if proper precautions are not taken. The materials commonly used in pumps are nickel based
alloys or Nickel Aluminium Bronze. These materials are chosen because of their strong
corrosion resistance and excellent cavitation properties.
In this report, the focus is to observe Ni-Resist Type 1, Ni-Resist Type D-4 and Nickel
Aluminium Bronze under different salinity and different temperatures, to see the effect
temperature and salinity have on the rate of corrosion. Scanning electron microscopy and
energy dispersive X-ray spectroscopy are also conducted on the materials before and after
corrosion to observe for any changes in morphology or elemental distribution. The weight
loss of each material is calculated after the corrosion immersion and compared to see how
each material corrodes at different salinities and temperatures. The results from this
experiment show that corrosion rates generally increased at higher temperatures. In contrast
corrosion rate generally decreased at higher salinities.
The results from this experiment could possibly help the oil and gas industry by providing
more information so that better decisions can be made during pump selection. This could also
potentially help companies save more money and provide a safer environment for their
workers as equipment failure rates will be lower. |
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