Corrosion Behavior of a High Strength Low Alloy Steel Under Hydrostatic Pressure in Deep Ocean

Authors

Hai-jing SUN, State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
Li LIU, State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;
Ying LI, State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;Follow

Corresponding Author

Ying LI(liying@imr.ac.cn)

Abstract

The corrosion behavior of a high strength low alloy steel (HSLA steel) in 3.5% NaCl solution under hydrostatic pressure (HP) in deep ocean has been investigated by performing weight loss measurement, obtaining potentiodynamic polarization curve and emplying electrochemical impedance spectroscopy (EIS) using the set up for simulation of deep sea environment in laboratory. The results were compared with that at atmospheric pressure and the influence of HP was emphatically discussed. The results revealed identical corrosion mechanism for HSLA steel at 3.5 × 106 Pa and 1 × 105 Pa. Howevere, the development of such a corrosion process was remarkably accelerated at HP. In addition, the cathodic process of HSLA steel was little influenced at HP, while the anodic dissolution process became faster partly attributed to the enhanced activity of Cl- ions.

Graphical Abstract

Keywords

deep sea, hydrostatic pressure, HSLA steel, corrosion behavior

DOI Link

https://doi.org/10.61558/2993-074X.2131

Publication Date

2013-10-28

Online Available Date

2013-04-22

Revised Date

2013-04-22

Received Date

2013-02-01

Recommended Citation

Hai-jing SUN, Li LIU, Ying LI. Corrosion Behavior of a High Strength Low Alloy Steel Under Hydrostatic Pressure in Deep Ocean[J]. Journal of Electrochemistry, 2013 , 19(5): 418-424.
DOI: 10.61558/2993-074X.2131
Available at: https://jelectrochem.xmu.edu.cn/journal/vol19/iss5/4