Initial Stage Oxidation and Surface Morphology of Modified 9Cr–1Mo Steel at High Temperatures in Air

Archana, M.; Ningshen, S.; Mallika, C.; Mudali, U. Kamachi

doi:10.1007/s12666-016-0932-6

Cited by 4 publications

(2 citation statements)

References 18 publications

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“…The surfaces of iron and steels under ambient conditions have been shown to be covered by layers of oxides. − The surface chemistry of the oxides is complex and depends on the crystal form of the oxide present, with the nature and number of surface chemical sites varying for different phases . In this work, both the steel and garnet have been exposed to air and surface hydroxides may have formed.…”

Section: Introductionmentioning

confidence: 99%

Characterizing Surfaces of Garnet and Steel, and Adsorption of Organic Additives

et al. 2018

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This work reports that abrasive blasting of a structural steel results in significant retention of garnet abrasive residues. A comparative study of the adsorption behavior of a number of organic species, relevant to paint components and additives, onto the surfaces of garnet and S355 steel from nonaqueous solutions is also presented. Areas per adsorbed molecule, estimated from the isotherm data, suggest a range of molecular orientations on the surfaces. Pronounced differences in the adsorption strength to the garnet and steel were observed, particularly that most additives bind more strongly to steel than to garnet. Surface characterization data from acid-base titrations, photoelectron spectroscopy, and backscattered electron diffraction were used to rationalize the adsorption data obtained. The ramifications of these findings for particular industrial processes, with regards the strength of paint adhesion and paint additive formulations, are highlighted.

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Section: Introductionmentioning

confidence: 99%

Characterizing Surfaces of Garnet and Steel, and Adsorption of Organic Additives

et al. 2018

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“…These steels can be operated at high temperature (Martinelli et al , 2015). High temperature corrosion resistance is one of the key requirements for alloys operated at high temperatures (Archana et al , 2017). The drastic alloy degradation of the component at high temperature environments lead to premature failure of the component and affect the reliability, availability and safety of the component.…”

Section: Introductionmentioning

confidence: 99%

Parametric optimization of wt.% Y₂O₃ modified chromium-aluminide coatings using utility concept-based Taguchi approach

Khammas

2017

MMMS

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Purpose The purpose of this paper is to obtain a single setting (optimal setting) of various input parameters of pack cementation process, i.e. halide salt activator, powder of master alloy and wt% of Y2O3 to obtain a single output characteristic as a whole namely resistance of hot corrosion for T91 steel. Design/methodology/approach The multi-criterion methodology based on Taguchi approach and utility concept has been used for optimization of the multiple performance characteristics namely hot corrosion rate KP1, KP2 and KP3 for pack cementation coated T91 steel in chlorine and vanadium environment. Findings All the three pack cementation parameters, namely, halide salt activator, powder of master alloy and wt% of Y2O3 had a significant effect on the utility function based on analysis of variance for multiple performances. The percentage contribution of halide activator (1.54 percent), master alloy powder (4.66 percent) and wt% Y2O3 (93.79 percent). The results indicated the beneficial influence of yttrium on the chemical stability of the protective layer in presence of chlorine and vanadium environments. The optimal parameter settings obtained in this study is A2B2C1, i.e. halide salt activator (NaCl), powder of master alloy (92Cr-8Al) and 1wt% of Y2O3. Research limitations/implications The outcome of this study shall be useful to explore the possible use of the developed coating for high temperature components. Unfortunately, the pack cementation was normally limited by the diffusion and reaction kinetics involved, which has a detrimental effect on the mechanical properties of work pieces. Therefore, reducing pack cementation temperature is required for widespread application of the pack coatings. Social implications Pack coating at optimum conditions can be used for surface coating technologies to economically improve high temperature oxidation, corrosion resistance of components. Originality/value The multi-criterion methodology based on Taguchi approach and utility concept has been used for first time for parametric optimization of wt% Y2O3 modified chromium- aluminide coatings for T91 steel.

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Bridging the gap between high temperature and low temperature oxidation of 316 L

et al. 2020

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Initial Stage Oxidation and Surface Morphology of Modified 9Cr–1Mo Steel at High Temperatures in Air

Cited by 4 publications

References 18 publications

Characterizing Surfaces of Garnet and Steel, and Adsorption of Organic Additives

Characterizing Surfaces of Garnet and Steel, and Adsorption of Organic Additives

Parametric optimization of wt.% Y₂O₃ modified chromium-aluminide coatings using utility concept-based Taguchi approach

Bridging the gap between high temperature and low temperature oxidation of 316 L

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Initial Stage Oxidation and Surface Morphology of Modified 9Cr–1Mo Steel at High Temperatures in Air

Cited by 4 publications

References 18 publications

Characterizing Surfaces of Garnet and Steel, and Adsorption of Organic Additives

Characterizing Surfaces of Garnet and Steel, and Adsorption of Organic Additives

Parametric optimization of wt.% Y2O3 modified chromium-aluminide coatings using utility concept-based Taguchi approach

Bridging the gap between high temperature and low temperature oxidation of 316 L

Contact Info

Product

Resources

About

Parametric optimization of wt.% Y₂O₃ modified chromium-aluminide coatings using utility concept-based Taguchi approach