scholarly journals A Statistical Study on the Effect of Hydrostatic Pressure on Metastable Pitting Corrosion of X70 Pipeline Steel

Materials ◽  
2017 ◽  
Vol 10 (11) ◽  
pp. 1307 ◽  
Author(s):  
Zixuan Yang ◽  
Bo Kan ◽  
Jinxu Li ◽  
Lijie Qiao ◽  
Alex A. Volinsky ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Pitting Corrosion ◽  
Statistical Study ◽  
Pipeline Steel ◽  
X70 Pipeline Steel ◽  
Metastable Pitting ◽  
Effect Of Hydrostatic Pressure

scholarly journals Anodic Dissolution of API X70 Pipeline Steel in Arabian Gulf Seawater after Different Exposure Intervals

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
El-Sayed M. Sherif ◽  
Abdulhakim A. Almajid
Keyword(s):  
Anodic Dissolution ◽  
Pitting Corrosion ◽  
Electrochemical Impedance ◽  
Pipeline Steel ◽  
Arabian Gulf ◽  
Open Circuit ◽  
General Corrosion ◽  
Sem Images ◽  
Current Time ◽  
X70 Pipeline Steel

The anodic dissolution of API X70 pipeline steel in Arabian Gulf seawater (AGSW) was investigated using open-circuit potential (OCP), electrochemical impedance spectroscopy (EIS), cyclic potentiodynamic polarization (CPP), and current-time measurements. The electrochemical experiments revealed that the X70 pipeline steel suffers both general and pitting corrosion in the AGSW solution. It was found that the general corrosion decreases as a result of decreasing the corrosion current density (jcorr), corrosion rate (Rcorr) and absolute currents as well as the increase of polarization resistance of X70 with increasing the exposure time. On the other hand, the pitting corrosion was found to increase with increasing the immersion time. This was confirmed by the increase of current with time and by the SEM images that were obtained on the steel surface after 20 h immersion before applying an amount of 0–.35 V versus Ag/AgCl for 1 h.

Influence of hydrostatic pressure on the pitting corrosion behavior of API X80 steel

CORROSION ◽  
10.5006/3810 ◽  
2021 ◽  
Author(s):  
Chengcheng Xu ◽  
Yuxiang Zhu ◽  
Meng Yu ◽  
Ying Jin ◽  
Lei Wen ◽  
...  
Keyword(s):  
Hydrostatic Pressure ◽  
Pitting Corrosion ◽  
Deep Sea ◽  
Cumulative Probability ◽  
Distribution Analysis ◽  
Kelvin Probe ◽  
Element Analysis ◽  
Test Steel ◽  
X80 Steel ◽  
Metastable Pitting

In this research, the effect of hydrostatic pressure on metastable and stable pitting corrosion of API X80 steel was investigated by using electrochemical method in simulated deep-sea environment. Cumulative probability distribution analysis of metastable pitting events revealed that hydrostatic pressure promoted the occurrence of metastable pitting corrosion and transformation trend of metastable pitting corrosion to stable pitting corrosion. Moreover, according to the results of scanning Kelvin probe force microscopy(SKPFM) tests, pitting corrosion of test steel can be confirmed to originate from the position of the interface between the inclusion and the substrate. Finally, combined with finite element analysis, the mechanism by which hydrostatic pressure promotes the occurrence and expansion of stable pitting corrosion of test steel in simulated deep -sea environment is explained.

STRESS CORROSION CRACK INITIATION BEHAVIOR FOR THE X70 PIPELINE STEEL BENEATH A DISBONDED COATING

2012 ◽  
Vol 48 (10) ◽  
pp. 1267 ◽  
Author(s):  
Zhiying WANG ◽  
Jianqiu WANG ◽  
En-hou HAN ◽  
Wei KE ◽  
Maocheng YAN ◽  
...  
Keyword(s):  
Crack Initiation ◽  
Stress Corrosion ◽  
Stress Corrosion Crack ◽  
Pipeline Steel ◽  
X70 Pipeline Steel ◽  
Disbonded Coating

Effect of Hydrostatic Pressure on the Curie Temperature of FeCr2S4and CoCr2S4

1985 ◽  
Vol 54 (1) ◽  
pp. 334-338 ◽  
Author(s):  
Takeshi Kanomata ◽  
Kiwamu Shirakawa ◽  
Takejiro Kaneko
Keyword(s):  
Hydrostatic Pressure ◽  
Curie Temperature ◽  
Effect Of Hydrostatic Pressure
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