Effect of Fe-Zn alloy layer on the corrosion resistance of galvanized steel in chloride containing environments

A. P. Yadav, H. Katayama, Kazuhiko Noda, H. Masuda, A. Nishikata, T. Tsuru

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

In this study, the effect of Fe-Zn alloy layer that is formed during galvanizing process on the corrosion behavior of galvanized steel has been investigated. The galvanostatic dissolution of galvanized steel was carried out in 0.5 M NaCl solution to obtain the Fe-Zn alloy layer on the base steel. The alloy layer was characterized to be composed of FeZn13, FeZn7 and Fe3Zn10 intermetallic phases, which constitute the zeta, delta1 and gamma layers of galvanized steel, respectively. It was observed that the alloy layer has similar cathodic polarization behavior but different anodic polarization behavior compared to galvanized steel. The anodic current plateau of alloy layer was up to 100 times lower than that of galvanized coating. Corrosion test performed in wet-dry cyclic condition has shown that the alloy layer has lower corrosion rate as compared to galvanized steel. From the results of corrosion test of alloy layer and base steel, it was concluded that Zn2+ has positive effect on the protectiveness of the zinc corrosion products. The measurement of surface potential over the alloy/steel galvanic couple has confirmed the galvanic ability of alloy layer to protect both the alloy layer itself and the base iron during initial stage of atmospheric corrosion.

Original languageEnglish
Pages (from-to)3716-3731
Number of pages16
JournalCorrosion Science
Volume49
Issue number9
DOIs
Publication statusPublished - 2007 Sep
Externally publishedYes

Fingerprint

Steel
Corrosion resistance
Chlorides
Corrosion
Atmospheric corrosion
Galvanizing
Cathodic polarization
Anodic polarization
Surface potential
Alloy steel
Corrosion rate
Intermetallics
Zinc
Dissolution
Iron
Coatings

Keywords

  • A. Iron
  • A. Zinc
  • C. Atmospheric corrosion
  • C. Corrosion potential
  • C. Galvanic couple

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

Cite this

Effect of Fe-Zn alloy layer on the corrosion resistance of galvanized steel in chloride containing environments. / Yadav, A. P.; Katayama, H.; Noda, Kazuhiko; Masuda, H.; Nishikata, A.; Tsuru, T.

In: Corrosion Science, Vol. 49, No. 9, 09.2007, p. 3716-3731.

Research output: Contribution to journalArticle

Yadav, A. P. ; Katayama, H. ; Noda, Kazuhiko ; Masuda, H. ; Nishikata, A. ; Tsuru, T. / Effect of Fe-Zn alloy layer on the corrosion resistance of galvanized steel in chloride containing environments. In: Corrosion Science. 2007 ; Vol. 49, No. 9. pp. 3716-3731.
@article{5e86f572cfd0451ca08288a01b459dc4,
title = "Effect of Fe-Zn alloy layer on the corrosion resistance of galvanized steel in chloride containing environments",
abstract = "In this study, the effect of Fe-Zn alloy layer that is formed during galvanizing process on the corrosion behavior of galvanized steel has been investigated. The galvanostatic dissolution of galvanized steel was carried out in 0.5 M NaCl solution to obtain the Fe-Zn alloy layer on the base steel. The alloy layer was characterized to be composed of FeZn13, FeZn7 and Fe3Zn10 intermetallic phases, which constitute the zeta, delta1 and gamma layers of galvanized steel, respectively. It was observed that the alloy layer has similar cathodic polarization behavior but different anodic polarization behavior compared to galvanized steel. The anodic current plateau of alloy layer was up to 100 times lower than that of galvanized coating. Corrosion test performed in wet-dry cyclic condition has shown that the alloy layer has lower corrosion rate as compared to galvanized steel. From the results of corrosion test of alloy layer and base steel, it was concluded that Zn2+ has positive effect on the protectiveness of the zinc corrosion products. The measurement of surface potential over the alloy/steel galvanic couple has confirmed the galvanic ability of alloy layer to protect both the alloy layer itself and the base iron during initial stage of atmospheric corrosion.",
keywords = "A. Iron, A. Zinc, C. Atmospheric corrosion, C. Corrosion potential, C. Galvanic couple",
author = "Yadav, {A. P.} and H. Katayama and Kazuhiko Noda and H. Masuda and A. Nishikata and T. Tsuru",
year = "2007",
month = "9",
doi = "10.1016/j.corsci.2007.03.039",
language = "English",
volume = "49",
pages = "3716--3731",
journal = "Corrosion Science",
issn = "0010-938X",
publisher = "Elsevier Limited",
number = "9",

}

TY - JOUR

T1 - Effect of Fe-Zn alloy layer on the corrosion resistance of galvanized steel in chloride containing environments

AU - Yadav, A. P.

AU - Katayama, H.

AU - Noda, Kazuhiko

AU - Masuda, H.

AU - Nishikata, A.

AU - Tsuru, T.

PY - 2007/9

Y1 - 2007/9

N2 - In this study, the effect of Fe-Zn alloy layer that is formed during galvanizing process on the corrosion behavior of galvanized steel has been investigated. The galvanostatic dissolution of galvanized steel was carried out in 0.5 M NaCl solution to obtain the Fe-Zn alloy layer on the base steel. The alloy layer was characterized to be composed of FeZn13, FeZn7 and Fe3Zn10 intermetallic phases, which constitute the zeta, delta1 and gamma layers of galvanized steel, respectively. It was observed that the alloy layer has similar cathodic polarization behavior but different anodic polarization behavior compared to galvanized steel. The anodic current plateau of alloy layer was up to 100 times lower than that of galvanized coating. Corrosion test performed in wet-dry cyclic condition has shown that the alloy layer has lower corrosion rate as compared to galvanized steel. From the results of corrosion test of alloy layer and base steel, it was concluded that Zn2+ has positive effect on the protectiveness of the zinc corrosion products. The measurement of surface potential over the alloy/steel galvanic couple has confirmed the galvanic ability of alloy layer to protect both the alloy layer itself and the base iron during initial stage of atmospheric corrosion.

AB - In this study, the effect of Fe-Zn alloy layer that is formed during galvanizing process on the corrosion behavior of galvanized steel has been investigated. The galvanostatic dissolution of galvanized steel was carried out in 0.5 M NaCl solution to obtain the Fe-Zn alloy layer on the base steel. The alloy layer was characterized to be composed of FeZn13, FeZn7 and Fe3Zn10 intermetallic phases, which constitute the zeta, delta1 and gamma layers of galvanized steel, respectively. It was observed that the alloy layer has similar cathodic polarization behavior but different anodic polarization behavior compared to galvanized steel. The anodic current plateau of alloy layer was up to 100 times lower than that of galvanized coating. Corrosion test performed in wet-dry cyclic condition has shown that the alloy layer has lower corrosion rate as compared to galvanized steel. From the results of corrosion test of alloy layer and base steel, it was concluded that Zn2+ has positive effect on the protectiveness of the zinc corrosion products. The measurement of surface potential over the alloy/steel galvanic couple has confirmed the galvanic ability of alloy layer to protect both the alloy layer itself and the base iron during initial stage of atmospheric corrosion.

KW - A. Iron

KW - A. Zinc

KW - C. Atmospheric corrosion

KW - C. Corrosion potential

KW - C. Galvanic couple

UR - http://www.scopus.com/inward/record.url?scp=34447506223&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34447506223&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2007.03.039

DO - 10.1016/j.corsci.2007.03.039

M3 - Article

AN - SCOPUS:34447506223

VL - 49

SP - 3716

EP - 3731

JO - Corrosion Science

JF - Corrosion Science

SN - 0010-938X

IS - 9

ER -