Stress Corrosion Susceptibility and Electrochemical Characteristic of X80 Under a Disbonded Coating in a Low-pH Soil Solution with Cathodic Protection

2021 ◽  
Author(s):  
Chao Liu ◽  
Zongshu Li ◽  
Xuedong Li ◽  
Bo Zhao ◽  
Cuiwei Du ◽  
...  
Keyword(s):  
Stress Corrosion ◽  
Soil Solution ◽  
Cathodic Protection ◽  
Low Ph ◽  
Electrochemical Characteristic ◽  
Corrosion Susceptibility ◽  
Disbonded Coating

Predicting Corrosion Under Disbonded Coating Using Modeling and Cathodic Protection Monitoring Coupon

2002 ◽  
Author(s):  
N. Sridhar ◽  
D. S. Dunn ◽  
O. Moghissi ◽  
F. King ◽  
J. Been
Keyword(s):  
Numerical Modeling ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Cathodic Protection ◽  
Corrosion Cracking ◽  
Soil Conditions ◽  
Modeling Approach ◽  
Bare Steel ◽  
Disbonded Coating

Coating defects generally take the form of either exposed bare steel or a disbondment, where a gap is formed between a relatively intact coating and bare steel. Cathodic protection can be difficult to achieve and monitor in the disbonded regions depending on the type of coating and soil conditions. Furthermore, stress corrosion cracking occurs predominantly under disbonded coatings. This paper describes a numerical modeling approach to predict the potential and chemistry under disbonded coating. In addition, the use of a monitoring coupon to simulate pipeline disbondments is demonstrated.

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
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