Abstract
A study was carried out to experimentally investigate the galvanic corrosion between the base metal and the weld of X52 carbon steel petroleum pipelines in CO2 containing saltwater at pH 4, and room temperature. The pipeline was fabricated by electric resistance welding (ERW). The electrochemical testing methods potentiodynamic sweep and linear polarization resistance were used to determine the corrosion potential and polarization resistance of the base metal and the weld. The galvanic current of the base metal coupled to the weld were measured using the zero resistance technique. The experimental results indicate that the weld was the anode for a very short time (about 0.4 hour) at the beginning of the experiment then became the cathode till the end of the experiment, which lasted more than 90 hours. This indicates that the pipe will not fail as a result of galvanic corrosion at the above experimental conditions since the area of the anode is significantly larger than that of the cathode.
| Original language | English |
|---|---|
| Title of host publication | European Corrosion Congress 2009, EUROCORR 2009 |
| Pages | 1081-1088 |
| Number of pages | 8 |
| State | Published - 2009 |
Publication series
| Name | European Corrosion Congress 2009, EUROCORR 2009 |
|---|---|
| Volume | 2 |
Bibliographical note
Funding Information:This work was financed by the Graduate School, Prince of Songkla University. Equipment and facilities were provided by the Department of Material Product Technology, Food Safety Lab and Starch and Plant Fiber Research Unit (SPF-RU).
Keywords
- CO corrosion
- Electric resistance welding
- Galvanic corrosion
- Petroleum pipelines
- X52 steel
ASJC Scopus subject areas
- Colloid and Surface Chemistry
- Surfaces and Interfaces