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Book ChapterDOI

A Comparative Study of Oxidation and Hot Corrosion of Electron Beam Welded Low Alloy Steel and Stainless Steel in Different Corrosive Environments

TL;DR: In this article, the performance of EBW low alloy steel AISI 4140 and stainless steel 304 in air as well as molten salt environments of Na2SO4-60%V2O5 and K2SO 4 -60% NaCl at 650(C) was reported.
Abstract: This paper reports on the performance of Electron Beam Welded (EBW) low alloy steel AISI 4140 and stainless steel AISI 304 in air as well as molten salt environments of Na2SO4-60%V2O5 and K2SO4-60% NaCl at 650(C. The corrosion kinetics has been established by thermo-gravimetric technique during the initial stages. In this work, X-ray diffraction, scanning electron microscopy/energy-dispersive analysis and electron probe micro analysis techniques were used to analyze the corrosion products. It is well observed from the experimental results that the weldments suffered accelerated corrosion in K2SO4-NaClenvironment and showed spalling/sputtering of the oxide scale. Furthermore, corrosion resistance of weld interface was found to be lower than that of parent metals in molten salt environment. It is also inferred from the results that NaCl is the one of the main corrosive species in hot corrosion, involving mixtures of K2SO4-NaCl and which is responsible for internal corrosion attack.
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22 Apr 1988

1,980 citations

Book
01 Dec 1990
TL;DR: A comprehensive treatment of all forms of high temperature corrosion problems encountered in industry, especially gas turbine and aerospace, heat treating, mineral and metallurgical processing, ceramic, electronic and glass manufacturing, automotive pulp and paper waste incineration fossil fuel power generation coal gasification nuclear, is described in this article.
Abstract: This extensive materials selection and application book is the first of its kind. It describes a comprehensive treatment of all forms of high temperature corrosion problems encountered in industry, especially gas turbine and aerospace, heat treating, mineral and metallurgical processing, ceramic, electronic and glass manufacturing, automotive pulp and paper waste incineration fossil fuel power generation coal gasification nuclear. Materials problems discussed include those due to oxidation, carburization and metal dusting nitridation, halogen corrosion, sulfidation, ash/salt deposit corrosion (e.g. hot corrosion, fuel ash corrosion, etc.), molten salt corrosion and molten metal corrosion. This single source contains an exhaustive corrosion database with a total of 101 tables and 169 figures, eliminating the need for conducting a time-consuming literature search. This book is a must for solving high temperature corrosion problems and learning about corrosion reactions of various high temperature corrosion modes. Contents: Methods of Testing and Evaluation Oxidation Carburization and Metal Dusting Nitridation Corrosion by Halogen Sulfidation Ash/Salt Deposit Corrosion - Molten Salt Corrosion Molten Metal Corrosion.

319 citations


"A Comparative Study of Oxidation an..." refers background in this paper

  • ...This results in severe corrosion attack by oxidation, sulfidation, chloridation and even hot corrosion [5]....

    [...]

Journal ArticleDOI
TL;DR: In this article, the microstructure and mechanical properties of AISI 304 stainless steel and low alloy steel joints by Gas Tungsten Arc Welding, Electron Beam Welding (EBW), and Friction Welding were investigated.

219 citations


"A Comparative Study of Oxidation an..." refers background in this paper

  • ...The authors reported the detailed study of the mechanical properties of AISI 4140 and AISI 304 dissimilar metals made by electron beam welding process in their earlier publication [10]....

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Journal ArticleDOI
TL;DR: In this paper, the mechanical properties of borides formed on AISI H13 hot work tool and AisI 304 stainless steels have been investigated, and the boride layer has a flat and smooth morphology in 304 steel while H13 steel was a ragged morphology.

156 citations


"A Comparative Study of Oxidation an..." refers background in this paper

  • ...make low-alloy steels, austenitic stainless steels and their combinations the best choice [2]....

    [...]

Journal ArticleDOI
TL;DR: In this paper, Ni 3 Al coatings were obtained on boiler tube steels through a plasma spray process and they were used as a bond coat before applying Ni 3Al coatings.
Abstract: Ni 3 Al coatings were obtained on boiler tube steels through a plasma spray process. Ni–Cr–Al–-Y was used as a bond coat before applying Ni 3 Al coatings. Characterisation and hot corrosion behaviour of coatings after exposure to air and molten salt at 900 °C were studied under cyclic conditions. The Ni 3 Al coating was very effective in decreasing the corrosion rate in air and molten salt at 900 °C in the case of ASTM-SA210 grade A1 and ASTM-SA213-T-11 types of steel. whereas the coating was least effective for ASTM-SA213-T-22 steel. Uncoated ASTM-SA213-T-22 steel showed very poor resistance to hot corrosion in molten salt environment, with spalling of the oxide scale.

127 citations


"A Comparative Study of Oxidation an..." refers background in this paper

  • ...The formation of Fe2O3 in the spalled scale has also been reported to be non-protective during their hot corrosion study on Fe3Al-based iron aluminides in Na2SO4 atmosphere [13, 14]....

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