Hot corrosion behaviour of CNT-reinforced ZrO2-Y2O3 composite coatings on boiler tube steel at 900°C

Kumar, Sandeep; Bhatia, Rakesh; Singh, Harmanpreet

doi:10.1108/acmm-12-2020-2412

Cited by 3 publications

(2 citation statements)

References 35 publications

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“…Anti-corrosion coatings applied in extreme environments such as the ocean are commonly referred to as heavy-duty anti-corrosion coatings (Rajendran et al , 2022; Kumar et al , 2021; Liu, et al , 2022; Dong et al , 2023). One of the most widely used is zinc-rich paint.…”

Section: Introductionmentioning

confidence: 99%

Studies of zinc content reduction using flake zinc powder in epoxy zinc-rich coatings

Liu,

Wang,

Cai

et al. 2023

ACMM

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Purpose Epoxy zinc-rich coatings are widely used in harsh environments because of the long-lasting cathodic protection of steel surfaces. The purpose of this paper is to use flake zinc powder instead of the commonly used spherical zinc powder to reduce the zinc powder content. Design/methodology/approach In this paper, the authors have prepared an anticorrosive zinc-rich coating using a flake zinc powder instead of the conventional spherical zinc powder. The optimal dispersion of scaly zinc powder in zinc-rich coatings has been explored by looking at the surface and cross-sectional morphology and studying the cathodic protection time of the coating. Findings The final epoxy zinc-rich coating with 35 Wt.% flake zinc powder content was prepared using sand-milling dispersions. It has a similar cathodic protection time and salt spray resistance as the 60 Wt.% spherical zinc-rich coating, with a higher low-frequency impedance modulus value. Originality/value This study uses flake zinc powder instead of the traditional spherical zinc powder. This reduces the amount of zinc powder in the coating and improves the corrosion resistance of the coating.

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Section: Introductionmentioning

confidence: 99%

Studies of zinc content reduction using flake zinc powder in epoxy zinc-rich coatings

Liu,

Wang,

Cai

et al. 2023

ACMM

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“…As a result, a layer of Na 2 SO 4 and NaCl salt film deposits on the surface of high-temperature alloys. Consequently, high-temperature alloys are prone to failure due to corrosion damage (Kumar et al, 2021;Lv et al, 2022aLv et al, , 2022bPomeroy, 2005;Yuan et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Hot corrosion behavior of hot isostatic pressing treated TiC/GTD222 composite fabricated by selective laser melting

Lv,

Liu,

Wang

et al. 2023

ACMM

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Purpose This paper aims to design a novel TiC/GTD222 nickel-based high-temperature alloy with excellent hot corrosion resistance by incorporating appropriate amounts of C, Al and Ti elements into GTD222 alloy. Design/methodology/approach The composite material was prepared using the selective laser melting (SLM) technology, followed by a hot isostatic pressing (HIP) treatment. Subsequently, the composite underwent a hot corrosion test in a 75% Na2SO4 + 25% NaCl mixed salt environment at 900 °C. Findings The HIP-SLMed TiC/GTD222 composite exhibits a relatively low weight loss rate. First, the addition of alloying elements facilitates the formation of multiple protective oxide films rich in Al, Ti and Cr. These oxide films play a crucial role in enhancing the material’s resistance to hot corrosion. Second, the HIP treatment results in a reduction of grain size in the composite and an increased number of grain boundaries, which further promote the formation of protective films. Originality/value The hot corrosion behavior of the TiC/GTD222 nickel-based composite material prepared through SLM and HIP processing has not been previously studied. This research provides a new approach for designing nickel-based superalloys with excellent hot corrosion resistance.

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High-temperature corrosion behavior of bare and NiCr-coated AISI 422 steel by varying the coating thickness in the Na2SO4 + 60%V2O5 environment

Khan,

Rajput,

Yadav

2023

Surf. Sci. Tech.

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It is difficult to assess fatalities due to high temperature corrosion, such as plant closure time, production loss, decrease in productivity, contamination, etc. In this context, the AISI 422 martensitic steel is a popular choice for high temperature applications due to its unique properties. The durability of this material can be increased by coating technology. The Ni-20Cr composite powder is a highly recommended choice for high-temperature applications. In this research, Ni-20Cr coating was sprayed on AISI 422 steel, using a flame spray process with two different thicknesses of 250–350 µm and 350–450 µm. Corrosion studies have been carried out at temperatures of 600 °C and 900 °C for Na2SO4 + 60%V2O5 salt solution environment. The corrosion kinetics were studied with the help of the Wagner equation. Micrographics analysis has been performed by Scanning electron microscopy (SEM) coupled with energy-dispersive spectroscopy (EDS), and X-ray diffraction (XRD) technique. Coated material has been shown better corrosion resistance compared to bare. The low-thickness coating has better corrosion resistance corresponding to both bare and high-thickness.

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Hot corrosion behaviour of CNT-reinforced ZrO₂-Y₂O₃ composite coatings on boiler tube steel at 900°C

Cited by 3 publications

References 35 publications

Studies of zinc content reduction using flake zinc powder in epoxy zinc-rich coatings

Studies of zinc content reduction using flake zinc powder in epoxy zinc-rich coatings

Hot corrosion behavior of hot isostatic pressing treated TiC/GTD222 composite fabricated by selective laser melting

High-temperature corrosion behavior of bare and NiCr-coated AISI 422 steel by varying the coating thickness in the Na2SO4 + 60%V2O5 environment

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