Analysis of Pitting Corrosion of Pipelines in a Marine Corrosive Environment Using COMSOL Multiphysics

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Vishal Prajapati ◽  
Yeeshu Kumar ◽  
Divyanshu Gupta ◽  
Abul Kalam ◽  
Mrigendra Dubey
Keyword(s):  
Pitting Corrosion ◽  
Comsol Multiphysics ◽  
Corrosive Environment

209 Relationship between Accelerated Pitting Corrosion and Residual Stress of Welded Material under Freezing and Thawing Corrosive Environment

2008 ◽  
Vol 2008.47 (0) ◽  
pp. 49-50
Author(s):  
Kazunori ISHITSUKA ◽  
Tuyoshi TAKAHASHI ◽  
Jun-ichi SHIBANO ◽  
Michiaki KOBAYASHI ◽  
Setsuo MIURA
Keyword(s):  
Residual Stress ◽  
Pitting Corrosion ◽  
Corrosive Environment ◽  
Freezing And Thawing

G041015 Effect of Corrosive Factors on Acceleration of Pitting Corrosion of Welded SUS304 Steel under Freezing and Thawing Corrosive Environment

2013 ◽  
Vol 2013 (0) ◽  
pp. _G041015-1-_G041015-4
Author(s):  
Kazunori ISHITSUKA ◽  
Tsuyoshi TAKAHASHI ◽  
Junichi SHIBANO ◽  
Setsuo MIURA ◽  
Michiaki KOBAYASHI
Keyword(s):  
Pitting Corrosion ◽  
Corrosive Environment ◽  
Freezing And Thawing

scholarly journals Investigation of Stress Concentration and Casing Strength Degradation Caused by Corrosion Pits

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Wei Yan ◽  
Yun Xu ◽  
Yi Zhou ◽  
Kongyang Wang
Keyword(s):  
Stress Concentration ◽  
Pitting Corrosion ◽  
Strength Degradation ◽  
Corrosive Environment ◽  
Collapse Load ◽  
Mechanical Loads ◽  
Inner Surface ◽  
Casing Strength ◽  
Concentration Degree ◽  
Corrosion Pits

Downhole casing and tubing are subjected to corrosion in many cases because of the exposure to corrosive environment. A more serious problem is that pitting corrosion occurs in the casing inner surface. Meanwhile, downhole strings are subjected to various forms of mechanical loads, for example, internal pressure load, external collapse load, or both. These loads acting on the corrosion pits will cause stress concentration and degrade the casing strength. Thus, it is essential to evaluate the stress concentration degree reasonably. The SCF (stress concentration factor) is usually used to characterize the degree of stress concentration induced by corrosion pits. This paper presented a comparison on the SCFs regarding the analytical method for a single pit and experimental method for double pits. The results show that the SCF of a single pit depends mainly on the depth of the corrosion pit; however, the SCF of the double pits strongly depends on the pits distance. A correction factor of 1.3 was recommended in the double pits SCF prediction model.

scholarly journals Effect of Corrosive Factors on Progression of Pitting Corrosion of Welded SUS304 Steel under Freezing and Thawing Corrosive Environment

2012 ◽  
Vol 78 (791) ◽  
pp. 1044-1055
Author(s):  
Kazunori ISHITSUKA ◽  
Tsuyoshi TAKAHASHI ◽  
Jun-ichi SHIBANO ◽  
Setsuo MIURA ◽  
Michiaki KOBAYASHI ◽  
...  
Keyword(s):  
Pitting Corrosion ◽  
Corrosive Environment ◽  
Freezing And Thawing

1415 Study of Accelerated Pitting Corrosion in Austenitic Stainless Steels under Freeze-Thawing Corrosive Environment

2008 ◽  
Vol 2008.1 (0) ◽  
pp. 237-238
Author(s):  
Kazunori ISHITSUKA ◽  
Tuyoshi TAKAHASHI ◽  
Jun-ichi SHIBANO ◽  
Michiaki KOBAYASHI ◽  
Setsuo MIURA
Keyword(s):  
Pitting Corrosion ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Corrosive Environment

Anticorrosion Property of TC27 Titanium Alloys and Application Evaluation in Tubing

2021 ◽  
Vol 1035 ◽  
pp. 615-623
Author(s):  
Ye Qin Zhang ◽  
Li Chun Qi ◽  
Yi Sheng Huang
Keyword(s):  
High Pressure ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Pitting Corrosion ◽  
Crevice Corrosion ◽  
Corrosive Environment ◽  
Corrosion Performance ◽  
Erosion Corrosion

In view of the combined effect of the load and the corrosive environment on the downhole tubing and the need for the selection of downhole tubing materials, the study on the pitting corrosion, crevice corrosion, erosion corrosion, high temperature and high pressure simulation of corrosion, galvanic corrosion, resistance to sulfide stress corrosion cracking SSC, resistance to hydrogen induced cracking, stress corrosion cracking test under simulated working conditions for TC27 titanium alloy was carried out. Furthermore, the corrosion performance was evaluated by the test results and evaluation standards such as GB/T 18590-2001, SY/T 7394-2017, GB/T 15748-2013. The results show that TC27 have excellent resistance to pitting corrosion, crevice corrosion and erosion corrosion under the corrosive environment of NaCl and H2S. The alloy also has excellent corrosion resistance and crack resistance under high-intensity environments such as high temperature and high pressure, and has good overall performance, which can effectively meet the needs of anti-corrosion performance of downhole tubing materials in different corrosive environments.

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