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Journal ArticleDOI

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

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.
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 ArticleDOI
TL;DR: In this paper, the effect of microstructure on sulfide stress cracking (SSC) properties of line pipe steel was evaluated using a constant elongation rate test (CERT) in a NACE TM0177 solution.
Abstract: The purpose of this experiment was to evaluate the effect of microstructure on sulfide stress cracking (SSC) properties of line pipe steel. Different kinds of microstructures, with chemical compositions identical to one steel heat, were produced by various thermomechanically controlled processes (TMCP). Coarse ferrite-pearlite, fine ferrite-pearlite, ferrite-acicular ferrite, and ferrite-bainite microstructures were investigated with respect to corrosion properties, hydrogen diffusion, and SSC behavior. SSC was evaluated using a constant elongation rate test (CERT) in a NACE TM0177 solution (5% sodium chloride [NaCl] + 0.5% acetic acid [CH3COOH], saturated with hydrogen sulfide [H2S]). The corrosion properties of steels were evaluated by potentiodynamic and linear polarization methods. Hydrogen diffusion through steel matrix was measured by an electrochemical method using a Devanathan-Stachurski cell. The effect of microstructure on cracking behavior also was investigated with respect to crack nu...

56 citations


"Effect of SAW fluxes on electrochem..." refers background or methods 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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  • ...Corrosion cracking resistance in the sour medium is improved for the steel containing bainite as compared to the martensite in the microstructure.(22)...

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Journal ArticleDOI
TL;DR: In this article, the variation of microstructure and mechanical properties in various sub-zones of double submerged arc welded line pipe steel of grade API X65 was investigated.

56 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of copper content in the range of 0.14-0.94% on the microstructure and mechanical properties of CrNi-Cu low alloy steel weld metal deposits was investigated.

50 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of TiO2 additions in fluxes on the mechanical properties and microstructure of the weld metal formed during Submerged Arc Welding (SAW) of ASTM A-36 steel plates was studied.

47 citations


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

  • ...After homogeneous mixing of the powder the flux dried in air environment for twenty four hours and then was fired in muffle furnace approximately for three hours at 900 C to completely remove the moisture from the flux.(4,11)...

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Journal ArticleDOI
TL;DR: In this article, the authors studied the effect of electrode coating ingredients on the mechanical properties such as tensile strength, percentage elongation, impact toughness, micro-hardness of the weld metal.

45 citations