Effect of SAW fluxes on electrochemical corrosion & microstructural behavior of API X70 weldments:

doi:10.1177/0954408921995699

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Effect of SAW fluxes on electrochemical corrosion & microstructural behavior of API X70 weldments:

Journal Article•DOI•

Effect of SAW fluxes on electrochemical corrosion & microstructural behavior of API X70 weldments:

Lochan Sharma¹, Rahul Chhibber², Deepak Bhandari•Institutions (2)

Chandigarh University¹, Indian Institute of Technology, Jodhpur²

15 Feb 2021-Vol. 235, Iss: 4, pp 1140-1149

TL;DR: Submerged arc welding finds its application to weld thick pipes as mentioned in this paper, and high performance pipeline steels are frequently used for storage, transportation and energy development applications, such as nuclear power plants.

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Abstract: High-performance pipeline steels are frequently used for storage, transportation and energy development applications. Submerged arc welding finds its application to weld thick pipes. Design and dev...

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Journal Article•DOI•

The influence of hydrogen sulfide on corrosion of iron under different conditions

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Houyi Ma¹, Xiaoliang Cheng¹, Guiqiu Li¹, Shenhao Chen¹, Zhenlan Quan¹, Shiyong Zhao¹, Lin Niu¹ - Show less +3 more•Institutions (1)

Shandong University¹

01 Oct 2000-Corrosion Science

TL;DR: In this article, a probable reaction mechanism is proposed to interpret theoretically how hydrogen sulfide inhibits the corrosion of iron, which is attributed to formation of ferrous sulfide (FeS) protective film on the electrode surface.

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428 citations

Journal Article•DOI•

Effect of microstructure on the hydrogen trapping efficiency and hydrogen induced cracking of linepipe steel

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Gyu Tae Park¹, Sung Ung Koh², Hwan Gyo Jung², Kyoo Kim¹•Institutions (2)

Pohang University of Science and Technology¹, POSCO²

01 Jul 2008-Corrosion Science

TL;DR: In this paper, a modified ISO17081(2004) standard method is used to evaluate the hydrogen trapping by measuring the permeability (JssL) and apparent diffusivity (Dapp).

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313 citations

"Effect of SAW fluxes on electrochem..." refers background in this paper

...20,21 Corrosion resistance properties of API steel in hydrogen sulphide environment widely depends on the steel microstructure and cleanliness.(22,25) Previous references show that polygonal ferrite microstructure exhibits higher corrosion rate as compared to the acicular ferrite microstructure....
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Journal Article•DOI•

The Formation of Ferrous Monosulfide Polymorphs during the Corrosion of Iron by Aqueous Hydrogen Sulfide at 21°C

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David W. Shoesmith¹, Peter Taylor¹, M. Grant Bailey¹, Derrek G. Owen¹•Institutions (1)

Atomic Energy of Canada Limited¹

01 May 1980-Journal of The Electrochemical Society

TL;DR: The initial stages of corrosion of iron by unstirred saturated aqueous H/sub 2/S solutions at 21/sup 0/C and atmospheric pressure have been examined as a function of time, pH (from 2 to 7, adjusted by addition of H/Sub 2/SO/sub 4/ or NaOH), and applied current as discussed by the authors.

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Abstract: The initial stages of corrosion of iron by unstirred saturated aqueous H/sub 2/S solutions at 21/sup 0/C and atmospheric pressure have been examined as a function of time, pH (from 2 to 7, adjusted by addition of H/sub 2/SO/sub 4/ or NaOH), and applied current. Detailed examination of the morphology and phase identity of the corrosion products has led to a qualitative mechanistic understanding of the corrosion reactions. Mackinawite (tetragonal FeS/sub 1-x/) is formed by both solid-state and precipitation processes. Cubic ferrous sulfide and troilite occur as precipitates between pH = 3 and pH = 5, subsequent to metal dissolution upon cracking of a mackinawite base layer formed by a solid-state mechanism. The corrosion rate, and the relative amounts of these phases produced, are controlled by pH, applied current, and the degree of convection. The corrosion rate increases with decreasing pH; the quantity of precipitated material peaks near pH = 4, below which dissolution becomes the dominant process as the solubilities of the sulfide solids increase. Significant passivation was observed only at pH = 7, when the initial mackinawite base layer remained virtually intact. The solid-state conversion of cubic ferrous sulfide to mackinawite at 21/sup 0/C was monitored by x-raymore » diffractometry. The resulting kinetics are consistent with the Avrami equation for a nucleation and growth process with a time exponent of 3.« less

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255 citations

"Effect of SAW fluxes on electrochem..." refers background in this paper

...Microstructure of low alloy steel widely affects the corrosion behavior in different mediums such as sea water and sodium thiosulphate solution.(23,24) Corrosion rate drastically increases due to the presence of hydrogen sulphide (generated during oil and gas transportation process) can accelerate the cathodic as well as anodic reactions of the corrosion process, i....
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Journal Article•DOI•

Characterization of inclusions of X80 pipeline steel and its correlation with hydrogen-induced cracking

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H.B. Xue¹, Yufeng Cheng¹•Institutions (1)

University of Calgary¹

01 Apr 2011-Corrosion Science

TL;DR: In this article, the microstructures of an X80 pipeline steel were characterized, and their susceptibilities to hydrogen-induced cracking were investigated by hydrogen-charging, electrochemical hydrogen permeation and surface characterization.

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189 citations

"Effect of SAW fluxes on electrochem..." refers result in this paper

...Higher susceptibility of the steel weld was also observed due to the large grains and dislocation density in heat affected zone.(31) F5B weld specimen exhibit fine grained microstructure (Figure 3(b)) as compared to the F3Ra and F19Ra weld specimen and responsible for minimum corrosion behavior....
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Journal Article•DOI•

Effect of H2S on the CO2 corrosion of carbon steel in acidic solutions

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Yoon-Seok Choi¹, Srdjan Nesic¹, Shiun Ling²•Institutions (2)

Ohio University¹, ExxonMobil²

15 Jan 2011-Electrochimica Acta

TL;DR: In this article, the effect of low-level hydrogen sulfide (H 2 S) on carbon dioxide (CO 2 ) corrosion of carbon steel in acidic solutions, and the mechanism of iron sulfide scale formation in CO 2 /H 2S environments were investigated using linear polarization resistance (LPR) technique.

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176 citations