Corrosion of Carbon Steel with and without Aluminized Coating in (O, S, H)-containing Gases at 500-800℃

Lee, Dong Bok; Abro, Waheed Ali; Lee, Kun Sang; Abro, Muhammad Ali

doi:10.5695/jkise.2017.50.2.85

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…The aluminium coating has superior resistance against sulfur-bearing pollutants. So, the aluminized components are preferred for use in industrial environments with high concentrations of SO 2 and other pollutants [27]. While manufacturing aluminized steel products continued, investigations into the phase evolution, morphology, and metallurgical structure developed vigorously after aluminizing and diffusion annealing.…”

Section: Advantages Of Al-based Coating Over Galvanizing On Steelmentioning

confidence: 99%

“…Li et al outlined several investigations on the phase equilibria in the iron-aluminium system for many decades, starting from the 1920s [25][26][27][28]. With the advent of more precise instruments for the analysis of phase changes, more reliable experimental data became available, especially for the aluminium-rich end of the Fe-Al phase diagram.…”

Section: The Iron-aluminium Binary Systemmentioning

confidence: 99%

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A review on metallurgical features of hot-dip aluminized steel

et al. 2023

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Among the various surface modification processes, the hot-dip aluminizing process has increasingly evoked considerable attention. This method has proved to be commercially cost-effective and technically better than galvanizing. In contrast to hot-dip aluminized steel components, galvanized components cannot be used in service conditions at elevated temperatures. During the last few years, intensive research by researchers has yielded new insights into metallurgical aspects of aluminized coating in as-dipped and annealed condition. The present review gives a bird’s eye view of the hot-dip aluminizing process, from the early years of its inception to the current research on aspects of the aluminized coating. The progress of research on thermodynamic studies, phase equilibria, phase identification, and their crystallographic features have been traced in this attempt. This review is not restricted to briefing the research performed so far but also points out several issues of discrepancies among the results of the published literature. Special emphasis has been given to the phase development in the coating during annealing and the increasing horizon of application of hot-dip aluminizing to alloy steels in hot stamped conditions. Reference has also been made to state-of-the-art topics embracing the current research on computer simulation software and sophisticated experimental techniques. However, lower surface hardness and economy restrict the wide application of the hot-dipping process.

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Section: Advantages Of Al-based Coating Over Galvanizing On Steelmentioning

confidence: 99%

Section: The Iron-aluminium Binary Systemmentioning

confidence: 99%

A review on metallurgical features of hot-dip aluminized steel

et al. 2023

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Corrosion of Mild Steel and Galvanized Steel in SO2 Enclosures: The Incidence of Negative Gravimetric Corrosion Rates

Oshin,

Fakinle,

Oyewole

2024

TOCENGJ

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Background Corrosion rates are frequently calculated from the weight loss of material samples, and they provide a measure of the degree of material degradation that has occurred when exposed to corrosive environments. However, some metal samples that have been exposed to corrosive environments experience negative weight loss, or more accurately, positive weight gain, which results in a negative corrosion rate. In the corpus of research on corrosion studies, there is little evidence for the occurrence of negative gravimetric corrosion rate in metals. Methods In this work, we employed gravimetric analysis to study the atmospheric corrosion of mild steel and galvanized steel in Sulphur (IV) oxide (SO2) enclosures or chambers for a period of 2 weeks and 4 weeks. The results indicated weight gain of the metals after exposure to the SO2-polluted atmospheric environment in the enclosures, thereby leading to negative corrosion rates. In seeking more insight to explain the observed phenomenon, XRF (X-Ray Fluorescence), SEM (Scanning electron microscopy) and FTIR (Fourier Transform Infrared Spectroscopy) analyses were conducted on the metal coupons. Results While the XRF results show a consistent reduction in the iron (Fe) content of the samples with a lesser percent iron composition observed with increasing exposure time, the SEM results reveal the formation of crystalline corrosion products on the metal surfaces. The FTIR results also indicated the pronounced presence of hydroxyl functional groups. Conclusion Both the XRF and SEM results indicate that the active components of the metal samples are being used up in the surface electrochemical reactions and are converted to visible corrosion products which are responsible for the weight gain. Concluding from the FTIR results, the presence of corrosion products Fe(OH)2 and Fe(OH)3 is confirmed among others.

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Corrosion of Carbon Steel with and without Aluminized Coating in (O, S, H)-containing Gases at 500-800℃

Abstract: The carbon steel formed the thick, somewhat porous, loosely adherent iron oxide scale when oxidized at 500-800

Cited by 2 publications

References 11 publications

A review on metallurgical features of hot-dip aluminized steel

A review on metallurgical features of hot-dip aluminized steel

Corrosion of Mild Steel and Galvanized Steel in SO2 Enclosures: The Incidence of Negative Gravimetric Corrosion Rates

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