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| Corrosion Behavior of Steels Used in Making Crude Oil Distillation Unit in High Temperature Crude Oil Fractions |
| HUANG Bensheng1, YIN Wenfeng2, WANG Xiaohong1, SHI Yijun1 |
1. College of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China;
2. Engineering Training Center, Southwest Petroleum University, Chengdu 610500, China |
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Abstract The corrosion behavior of four steels used in making crude oil distillation unit in high temperature crude oil fractions was studied in an autoclave to simulate the corrosive environment in atmospheric and vacuum distillation unit. The mass loss of the samples was measured and then the corrosion morphology was characterized by scanning electron microscopy. The result showed that the higher acid value, sulfur content and salt content of the crude oil resulted in much serious corrosiveness on 20 steel and the corrosiveness of the substances could be ranked as the desalted crude oil > the second atmospheric side-cut fraction > the first atmospheric side-cut fraction. Alloying elements Cr, Ni and Mo could help to improve the corrosion resistance of steels，and the corrosion resistance of the test steels could be ranked as 316 stainless steel > 304 stainless steel > 1Cr5Mo > 20 steel. The overall corrosion rate usually increased with increasing temperature, however, which could reach extreme value in certain range of temperature.
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Cite this article:
HUANG Bensheng,YIN Wenfeng,WANG Xiaohong,SHI Yijun. Corrosion Behavior of Steels Used in Making Crude Oil Distillation Unit in High Temperature Crude Oil Fractions. Journal of Chinese Society for Corrosion and protection, 2013, 33(5): 377-382.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y2013/V33/I5/377
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