Grooving corrosion of electric-resistance-welded oil well casing of J55 steel

Wang, Rong; Luo, Sheji

doi:10.1016/j.corsci.2012.11.002

Cited by 20 publications

(7 citation statements)

References 20 publications

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“…This limits the application possibility of ERW steel pipes and has become a major concern. [3][4][5][6][7] In this study, a critical assessment has been made for the electric resistance welded American Petroleum Institute (API) J55 and P110 steel pipes to clarify the metallurgical factors crucial to the occurrence of welding defects. Various J55 and P110 steel pipes with different sulfur and phosphorous contents were investigated to explore the effect of sulfur and phosphorous on the defect formation.…”

Section: Introductionmentioning

confidence: 99%

A Study of Metallurgical Factors for Defect Formation in Electric Resistance Welded API Steel Pipes

Joo

Noh

Kim

et al. 2015

Metallurgical and Materials Transactions E

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A critical assessment has been made for the electric resistance welded API-J55 and P110 steel pipes to clarify the metallurgical factors crucial to the occurrence of welding defects. Electric resistance welding (ERW) is widely accepted due to its low cost and high efficiency of production as a conventional manufacturing technology for the steel pipes. However, ERW pipes are vulnerable to the defect formation because its welding zone has different characteristics compared to the base material. It has been found that there were two major crack types in the investigated steels: surface crack and hook crack (J-shaped crack). Macroscopic examinations suggested that the causes and occurrences of the cracks were distinct among the investigated steels. The small surface cracks were largely occurred in the API-J55 steel pipes. The microstructure in the vicinity of crack was identical to the matrix, but it was found that the formation of the surface cracks was attributed to the sulfur and oxide inclusions. The energy dispersive X-ray spectroscopy (EDS) analysis showed that the cracks were associated with hydrogen and clusters of complex oxide inclusions with calcium such as Al-Ca-O and Fe-Ca-O. Moreover, sulfur was found to be the major culprit for the surface crack formation in the statistical evaluation. On the other hand, most of the hook cracks were large in size and occurred in the API-P110 steel pipes even though the sulfur level was very low, where the phosphorous was critical to the occurrence of hook crack. Although the EDS analysis showed the similar oxides compared to the case of surface cracks, B and P segregation were found in secondary ion mass spectrometry and electron probe micro analyzer analyses. In the vicinity of the hook cracks, martensite (locally hardened microstructure) was formed because the segregation enhances the hardenability. Eventually, the crack propagates along the martensite which was the band of ferrite and pearlite. It is postulated that the hook crack in API-P110 steel pipes is initiated from the oxides with hydrogen and propagated along the banded microstructure with the prior austenite grain boundaries where culprit elements can be segregated.

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Section: Introductionmentioning

confidence: 99%

A Study of Metallurgical Factors for Defect Formation in Electric Resistance Welded API Steel Pipes

Joo

Noh

Kim

et al. 2015

Metallurgical and Materials Transactions E

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“…Pipeline steels have an enormous application market in China due to the vast land resources and abundant petroleum resources in China. The annual consumption of pipeline steel is very large, motivating the development of the advanced pipeline steels [6][7][8][9][10]. The service life of pipeline steels should be long enough to reduce the replacement cost.…”

Section: Introductionmentioning

confidence: 99%

Effects of Q&T parameters on phase transformation, microstructure, precipitation and mechanical properties in a PS-30Cr2Nb pipeline steel

Guan

Yuan

Xiong

et al. 2020

Mater. Res. Express

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The heat treatments with different quenching and tempering temperatures were conducted to clarify the effects of Q&T (quenching and tempering) parameters on phase transformation, microstructure, precipitation, mechanical properties in a PS-30Cr2Nb pipeline steel. Results indicate that the optimum property of tensile strength of 892 MPa and elongation of 19.17% was obtained at a low quenching (950°C) and low tempering temperature (570°C). Finer prior austenite grains and carbides contributed to the higher strength. Besides, the content of coarsening carbides increased with tempering temperature and quenching temperature. The increased content of coarsening carbides is responsible for the deteriorative comprehensive performance. In addition, Fe 3 C particle was gradually substituted by the alloy carbides with the proceeding of tempering by the dynamic assignment of elements.

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“…Electric resistance welding (ERW) is a manufacturing technology employed for the production of pipes for different applications including water distribution systems and gas and oil pipelines . The seam weld of the pipes is obtained by high frequency ERW at the edges of a continuous coil steel strip, which are pressed by squeeze rolls.…”

Section: Introductionmentioning

confidence: 99%

“…The seam weld of the pipes is obtained by high frequency ERW at the edges of a continuous coil steel strip, which are pressed by squeeze rolls. No weld filler, wire, or fluxes are used in the process . The seam weld might be susceptible to severe preferential corrosion when ERW pipes work in critical corrosive environments .…”

Section: Introductionmentioning

confidence: 99%

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Galvanic corrosion of the seam weld in Zn–Al coated steel pipes manufactured by electric resistance welding

Andreatta

Bellezze

Lanzutti

et al. 2016

Materials & Corrosion

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Severe corrosion attack at the seam weld was observed in Zn-Al coated steel pipes of a closed heating system. This system was operating with tap water at about 70 8C and in the presence of an unknown amount of oxygen due to water reintegration. The corroded pipes showed a preferential corrosion of the seam weld along the longitudinal direction of the pipe. In order to investigate the cause of this attack, the electrochemical behavior of the seam weld was studied by means of an electrochemical micro-cell. This technique was used for the characterization of non-corroded and corroded pipe samples. The study proves that the damage mechanism is due to Zn-Al coating depletion at the seam weld and the potential coupling reversal between the coating and the steel substrate under service conditions. This caused strong galvanic corrosion between the steel exposed along the seam weld and the Zn-Al coating leading to the failure of the pipes. Materials and Corrosion 2017, 68, No. 3 Galvanic corrosion in Zn-Al coated ERW steel pipes Figure 6. Optical micrographs showing the areas of a non-corroded pipe investigated by means of an electrochemical micro-cell on the seam weld (A) and on the Zn-Al coating (B) and potentiodynamic polarization curves acquired in tap water (C) www.matcorr.com

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Grooving corrosion of electric-resistance-welded oil well casing of J55 steel

Cited by 20 publications

References 20 publications

A Study of Metallurgical Factors for Defect Formation in Electric Resistance Welded API Steel Pipes

A Study of Metallurgical Factors for Defect Formation in Electric Resistance Welded API Steel Pipes

Effects of Q&T parameters on phase transformation, microstructure, precipitation and mechanical properties in a PS-30Cr2Nb pipeline steel

Galvanic corrosion of the seam weld in Zn–Al coated steel pipes manufactured by electric resistance welding

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