Effect of iron powder on zinc reactivity and anticorrosion performance of zinc-rich epoxy coatings

Chunping Qi; Kim Dam-Johansen; Claus Erik Weinell; Hao Wu

doi:10.1016/j.porgcoat.2024.108403

Effect of iron powder on zinc reactivity and anticorrosion performance of zinc-rich epoxy coatings

Chunping Qi, Kim Dam-Johansen, Claus Erik Weinell, Hao Wu^*

^*Corresponding author for this work

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Abstract

This study investigated the impact of iron powder on zinc reactivity and anticorrosion performance of zinc-rich epoxy (ZRE) coatings. Incorporating iron powder into ZRE coatings enhanced their overall anticorrosion performance, as evidenced by improved cathodic protection and reduced rust creep in salt spray tests. Furthermore, salt spray and EIS tests on cracked ZRE coatings demonstrated the enhanced sacrificial cathodic protection and physical barrier property with the inclusion of iron powder, attributed to the promoted sacrificial oxidation of zinc particles at damaged areas. The enhanced zinc dissolution in the presence of iron powder was also observed in immersion tests and potentiodynamic polarization tests on compressed Zn and Znsingle bondFe pellets.

Original language	English
Article number	108403
Journal	Progress in Organic Coatings
Volume	190
Number of pages	10
ISSN	0033-0655
DOIs	https://doi.org/10.1016/j.porgcoat.2024.108403
Publication status	Published - 2024

Keywords

Anticorrosion
Cathodic protection
Iron powder
Zinc dust
Zinc-rich epoxy coating

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title = "Effect of iron powder on zinc reactivity and anticorrosion performance of zinc-rich epoxy coatings",

abstract = "This study investigated the impact of iron powder on zinc reactivity and anticorrosion performance of zinc-rich epoxy (ZRE) coatings. Incorporating iron powder into ZRE coatings enhanced their overall anticorrosion performance, as evidenced by improved cathodic protection and reduced rust creep in salt spray tests. Furthermore, salt spray and EIS tests on cracked ZRE coatings demonstrated the enhanced sacrificial cathodic protection and physical barrier property with the inclusion of iron powder, attributed to the promoted sacrificial oxidation of zinc particles at damaged areas. The enhanced zinc dissolution in the presence of iron powder was also observed in immersion tests and potentiodynamic polarization tests on compressed Zn and Znsingle bondFe pellets.",

keywords = "Anticorrosion, Cathodic protection, Iron powder, Zinc dust, Zinc-rich epoxy coating",

author = "Chunping Qi and Kim Dam-Johansen and Weinell, {Claus Erik} and Hao Wu",

year = "2024",

doi = "10.1016/j.porgcoat.2024.108403",

language = "English",

volume = "190",

journal = "Progress in Organic Coatings",

issn = "0033-0655",

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TY - JOUR

T1 - Effect of iron powder on zinc reactivity and anticorrosion performance of zinc-rich epoxy coatings

AU - Qi, Chunping

AU - Dam-Johansen, Kim

AU - Weinell, Claus Erik

AU - Wu, Hao

PY - 2024

Y1 - 2024

N2 - This study investigated the impact of iron powder on zinc reactivity and anticorrosion performance of zinc-rich epoxy (ZRE) coatings. Incorporating iron powder into ZRE coatings enhanced their overall anticorrosion performance, as evidenced by improved cathodic protection and reduced rust creep in salt spray tests. Furthermore, salt spray and EIS tests on cracked ZRE coatings demonstrated the enhanced sacrificial cathodic protection and physical barrier property with the inclusion of iron powder, attributed to the promoted sacrificial oxidation of zinc particles at damaged areas. The enhanced zinc dissolution in the presence of iron powder was also observed in immersion tests and potentiodynamic polarization tests on compressed Zn and Znsingle bondFe pellets.

AB - This study investigated the impact of iron powder on zinc reactivity and anticorrosion performance of zinc-rich epoxy (ZRE) coatings. Incorporating iron powder into ZRE coatings enhanced their overall anticorrosion performance, as evidenced by improved cathodic protection and reduced rust creep in salt spray tests. Furthermore, salt spray and EIS tests on cracked ZRE coatings demonstrated the enhanced sacrificial cathodic protection and physical barrier property with the inclusion of iron powder, attributed to the promoted sacrificial oxidation of zinc particles at damaged areas. The enhanced zinc dissolution in the presence of iron powder was also observed in immersion tests and potentiodynamic polarization tests on compressed Zn and Znsingle bondFe pellets.

KW - Anticorrosion

KW - Cathodic protection

KW - Iron powder

KW - Zinc dust

KW - Zinc-rich epoxy coating

U2 - 10.1016/j.porgcoat.2024.108403

DO - 10.1016/j.porgcoat.2024.108403

M3 - Journal article

SN - 0033-0655

VL - 190

JO - Progress in Organic Coatings

JF - Progress in Organic Coatings

M1 - 108403

ER -

Effect of iron powder on zinc reactivity and anticorrosion performance of zinc-rich epoxy coatings

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