Influence of calcium on the morphology and corrosion performance of hot-dip Al–Si coatings

Srinivasulu Grandhi; Min Suk Oh

doi:10.1016/j.matlet.2023.135278

Influence of calcium on the morphology and corrosion performance of hot-dip Al–Si coatings

Srinivasulu Grandhi
, Min Suk Oh^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Hot-dip aluminizing coatings are gaining attention owing to their corrosion resistance under harsh conditions and economic viability. Although Ca incorporation into metal alloy coatings has been demonstrated to improve the corrosion resistance, Ca addition to hot-dip aluminizing coatings is yet to be reported. Here, we investigated the effect of the Ca content on the microstructures and electrochemical properties of hot-dip aluminizing coatings on commercial quality steel. Defect-free coatings were obtained by optimizing the hot-dipping parameters. Ca promoted the precipitation of CaAl₂Si₂, altering the morphology of the coating and improving the corrosion resistance. However, owing to the limited stability of the passive layer, the inclusion of Ca did not significantly affect the long-term corrosion characteristics of the Al alloy coating.

Original language	English
Article number	135278
Journal	Materials Letters
Volume	353
DOIs	https://doi.org/10.1016/j.matlet.2023.135278
State	Published - 15 Dec 2023
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2023

Keywords

Al alloy coating
Calcium
Corrosion resistance
Electrochemical
Microstructure

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Influence of calcium on the morphology and corrosion performance of hot-dip Al–Si coatings",

abstract = "Hot-dip aluminizing coatings are gaining attention owing to their corrosion resistance under harsh conditions and economic viability. Although Ca incorporation into metal alloy coatings has been demonstrated to improve the corrosion resistance, Ca addition to hot-dip aluminizing coatings is yet to be reported. Here, we investigated the effect of the Ca content on the microstructures and electrochemical properties of hot-dip aluminizing coatings on commercial quality steel. Defect-free coatings were obtained by optimizing the hot-dipping parameters. Ca promoted the precipitation of CaAl2Si2, altering the morphology of the coating and improving the corrosion resistance. However, owing to the limited stability of the passive layer, the inclusion of Ca did not significantly affect the long-term corrosion characteristics of the Al alloy coating.",

keywords = "Al alloy coating, Calcium, Corrosion resistance, Electrochemical, Microstructure",

author = "Srinivasulu Grandhi and Oh, \{Min Suk\}",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2023",

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doi = "10.1016/j.matlet.2023.135278",

language = "English",

volume = "353",

journal = "Materials Letters",

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T1 - Influence of calcium on the morphology and corrosion performance of hot-dip Al–Si coatings

AU - Grandhi, Srinivasulu

AU - Oh, Min Suk

PY - 2023/12/15

Y1 - 2023/12/15

N2 - Hot-dip aluminizing coatings are gaining attention owing to their corrosion resistance under harsh conditions and economic viability. Although Ca incorporation into metal alloy coatings has been demonstrated to improve the corrosion resistance, Ca addition to hot-dip aluminizing coatings is yet to be reported. Here, we investigated the effect of the Ca content on the microstructures and electrochemical properties of hot-dip aluminizing coatings on commercial quality steel. Defect-free coatings were obtained by optimizing the hot-dipping parameters. Ca promoted the precipitation of CaAl2Si2, altering the morphology of the coating and improving the corrosion resistance. However, owing to the limited stability of the passive layer, the inclusion of Ca did not significantly affect the long-term corrosion characteristics of the Al alloy coating.

AB - Hot-dip aluminizing coatings are gaining attention owing to their corrosion resistance under harsh conditions and economic viability. Although Ca incorporation into metal alloy coatings has been demonstrated to improve the corrosion resistance, Ca addition to hot-dip aluminizing coatings is yet to be reported. Here, we investigated the effect of the Ca content on the microstructures and electrochemical properties of hot-dip aluminizing coatings on commercial quality steel. Defect-free coatings were obtained by optimizing the hot-dipping parameters. Ca promoted the precipitation of CaAl2Si2, altering the morphology of the coating and improving the corrosion resistance. However, owing to the limited stability of the passive layer, the inclusion of Ca did not significantly affect the long-term corrosion characteristics of the Al alloy coating.

KW - Al alloy coating

KW - Calcium

KW - Corrosion resistance

KW - Electrochemical

KW - Microstructure

UR - https://www.scopus.com/pages/publications/85172932841

U2 - 10.1016/j.matlet.2023.135278

DO - 10.1016/j.matlet.2023.135278

M3 - Article

AN - SCOPUS:85172932841

SN - 0167-577X

VL - 353

JO - Materials Letters

JF - Materials Letters

M1 - 135278

ER -

Influence of calcium on the morphology and corrosion performance of hot-dip Al–Si coatings

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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