Near-neutral pH corrosion and stress corrosion crack initiation of a mill-scaled pipeline steel under the combined effect of oxygen and paint primer

2021 ◽  
Vol 187 ◽  
pp. 109511
Author(s):  
Shidong Wang ◽  
Lyndon Lamborn ◽  
Weixing Chen
Keyword(s):  
Crack Initiation ◽  
Stress Corrosion ◽  
Stress Corrosion Crack ◽  
Pipeline Steel ◽  
Combined Effect ◽  
Neutral Ph ◽  
Effect Of Oxygen

Developing prepitting procedure for near neutral pH stress corrosion crack initiation studies on X-52 pipeline steel

2015 ◽  
Vol 50 (3) ◽  
pp. 196-202 ◽  
Author(s):  
Z. Shirband ◽  
R. L. Eadie ◽  
W. Chen ◽  
J. L. Luo ◽  
R. Kania ◽  
...  
Keyword(s):  
Crack Initiation ◽  
Stress Corrosion ◽  
Stress Corrosion Crack ◽  
Pipeline Steel ◽  
Neutral Ph ◽  
Ph Stress

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

Dense and Sparse Stress Corrosion Crack Initiation in an X65 Pipeline Steel With Mill Scale

2020 ◽  
Author(s):  
Shidong Wang ◽  
Lyndon Lamborn ◽  
Karina Chevil ◽  
Erwin Gamboa ◽  
Weixing Chen
Keyword(s):  
Crack Initiation ◽  
Stress Corrosion ◽  
Pipeline Steel ◽  
Crack Density ◽  
Mill Scale ◽  
Neutral Ph ◽  
Field Operation ◽  
Oil Pipelines ◽  
Safety And Reliability ◽  
Made In

Abstract Near-neutral pH stress corrosion cracking (SCC) is a significant threat to the operational safety and reliability of gas and oil pipelines. The SCC cracks are typically formed in colonies with different crack density populations on the external surface of the pipe. The density of SCC cracks affect how pipeline integrity and remaining lifetime are assessed. Although sparse and dense crack colonies are commonly observed on pipelines, it has not been well established how these crack colonies with different crack populations were developed in the field. This research was made in an attempt to replicate near-neutral pH SCC cracks with different crack densities in the laboratory with realistic loading conditions commonly found during field operation. An X65 pipeline steel with different surface preparations was used. The results showed that the dense near-neutral pH SCC cracks were successfully reproduced on the primer-coated samples, whereas sparse cracks were reproduced on the mill-scaled and polished samples. The densely spaced cracks could transform into sparsely spaced cracks when most of the primer layer and mill scale had been removed during the long period of corrosion under cyclic loading and further corrosion occurred thinning the crack density. The results of crack initiation obtained from this investigation have also been found to be quite consistent with crack initiation scenarios found during field operation.

Microstructure Dependence of Stress Corrosion Cracking Initiation in X-65 Pipeline Steel Exposed to a Near-Neutral pH Soil Environment

CORROSION ◽  
2004 ◽  
Vol 60 (3) ◽  
pp. 275-283 ◽  
Author(s):  
R. Chu ◽  
W. Chen ◽  
S.-H. Wang ◽  
F. King ◽  
T. R. Jack ◽  
...  
Keyword(s):  
Crack Initiation ◽  
Stress Corrosion ◽  
Soil Solution ◽  
Open Circuit Potential ◽  
Pipeline Steel ◽  
Open Circuit ◽  
Polished Surface ◽  
Soil Environment ◽  
Neutral Ph

Abstract A study was carried out to understand mechanisms of stress corrosion crack initiation in an X-65 pipeline steel exposed to a near-neutral pH soil environment under a mechanical loading condition typical of a pipeline operating in the field. Microcracks initiated on the polished surface of the X-65 pipeline steel after long-term exposure at open-circuit potential in a near-neutral pH synthetic soil solution. It was found that these microcracks were initiated mostly from pits at metallurgical discontinuities such as grain boundaries, pearlitic colonies, and banded phases in the steel. Strong preferential dissolution was observed along planes of the banded structures in the steel. Selective corrosion at these metallurgical discontinuities is attributed to the anodic nature of those areas relative to the neighboring steel surface. Consistent with previous observations, no increased susceptibility to crack initiation was found at physical discontinuities mechanically introduced into the surface of steel exposed to synthetic soil solution at open-circuit potential.

scholarly journals Influence of the ultrasonic surface rolling process on stress corrosion cracking susceptibility of high strength pipeline steel in neutral pH environment

RSC Advances ◽  
2017 ◽  
Vol 7 (59) ◽  
pp. 36876-36885 ◽  
Author(s):  
Bingying Wang ◽  
Yu Yin ◽  
Zhiwei Gao ◽  
Zhenbo Hou ◽  
Wenchun Jiang
Keyword(s):  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Pipeline Steel ◽  
High Strength ◽  
Rolling Process ◽  
Corrosion Cracking ◽  
X80 Pipeline Steel ◽  
Enhancement Technique ◽  
Neutral Ph ◽  
Developed Surface

A developed surface enhancement technique, USRP, was applied on X80 pipeline steel and the stress corrosion cracking susceptibility was studied.

Sign in / Sign up

Export Citation Format

Share Document