Ion selectivity of rust formed on low-alloy steels under a cyclic wet-and-dry condition

Kazuhiko Noda, Toshiyasu Nishimura, Hiroyuki Masuda, Toshiaki Kodama

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Low-alloy steel foils of 20 μm thick were corroded under a cyclic wet-and-dry condition simulating highly corrosive coastal environment. Compositions of Fe-1 mass%Co, Fe-3 mass%Co, Fe-3 mass%Ni and Fe-0.8 mass%Al were selected as testing materials because they were thought to be basic alloys of weathering steels for the use in coastal environments. The steel foils were entirely transformed into rust to form rust membranes by processing more than 20 wet-and-dry cycles. The rust membranes were carefully attached to a dual-compartment cell for the measurement of membrane potential. Membrane potential generated by the difference in ionic diffusion rates of K+ and Cl- ions was measured as a function of concentration difference of KCl between solutions in the compartments separated by the membrane. The membrane potential thus measured was proved to be effective in evaluating the performance of rust formed on steel surface. The rust layer formed on the steels of Fe-3%Ni and Fe-1%W showed anion selectivity, while the rust on Fe-1%Co, Fe-3%Co, and Fe-0.8%Al steels, revealed cation selectivity. The addition of Co and Al to the steel decreases the corrosion rate because penetration of chloride ions into the rust is inhibited by the cation selective permeability of rust. The addition of Ni and W is known to be effective in decreasing corrosion rate of steel, despite their anion selective nature in rust. Alternative mechanisms other than ion selectivity are required for the elucidation of inhibition by Ni and W.

Original languageEnglish
Pages (from-to)767-770
Number of pages4
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume64
Issue number9
Publication statusPublished - 2000
Externally publishedYes

Fingerprint

rust fungi
high strength steels
Steel
High strength steel
selectivity
Ions
Membranes
steels
membranes
ions
Corrosion rate
Metal foil
Anions
Cations
Negative ions
Positive ions
Weathering steel
compartments
Caustics
Materials testing

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Ion selectivity of rust formed on low-alloy steels under a cyclic wet-and-dry condition. / Noda, Kazuhiko; Nishimura, Toshiyasu; Masuda, Hiroyuki; Kodama, Toshiaki.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 64, No. 9, 2000, p. 767-770.

Research output: Contribution to journalArticle

@article{a3a31b6f0a5447a398eed222a1fdba3d,
title = "Ion selectivity of rust formed on low-alloy steels under a cyclic wet-and-dry condition",
abstract = "Low-alloy steel foils of 20 μm thick were corroded under a cyclic wet-and-dry condition simulating highly corrosive coastal environment. Compositions of Fe-1 mass{\%}Co, Fe-3 mass{\%}Co, Fe-3 mass{\%}Ni and Fe-0.8 mass{\%}Al were selected as testing materials because they were thought to be basic alloys of weathering steels for the use in coastal environments. The steel foils were entirely transformed into rust to form rust membranes by processing more than 20 wet-and-dry cycles. The rust membranes were carefully attached to a dual-compartment cell for the measurement of membrane potential. Membrane potential generated by the difference in ionic diffusion rates of K+ and Cl- ions was measured as a function of concentration difference of KCl between solutions in the compartments separated by the membrane. The membrane potential thus measured was proved to be effective in evaluating the performance of rust formed on steel surface. The rust layer formed on the steels of Fe-3{\%}Ni and Fe-1{\%}W showed anion selectivity, while the rust on Fe-1{\%}Co, Fe-3{\%}Co, and Fe-0.8{\%}Al steels, revealed cation selectivity. The addition of Co and Al to the steel decreases the corrosion rate because penetration of chloride ions into the rust is inhibited by the cation selective permeability of rust. The addition of Ni and W is known to be effective in decreasing corrosion rate of steel, despite their anion selective nature in rust. Alternative mechanisms other than ion selectivity are required for the elucidation of inhibition by Ni and W.",
author = "Kazuhiko Noda and Toshiyasu Nishimura and Hiroyuki Masuda and Toshiaki Kodama",
year = "2000",
language = "English",
volume = "64",
pages = "767--770",
journal = "Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals",
issn = "0021-4876",
publisher = "Japan Institute of Metals (JIM)",
number = "9",

}

TY - JOUR

T1 - Ion selectivity of rust formed on low-alloy steels under a cyclic wet-and-dry condition

AU - Noda, Kazuhiko

AU - Nishimura, Toshiyasu

AU - Masuda, Hiroyuki

AU - Kodama, Toshiaki

PY - 2000

Y1 - 2000

N2 - Low-alloy steel foils of 20 μm thick were corroded under a cyclic wet-and-dry condition simulating highly corrosive coastal environment. Compositions of Fe-1 mass%Co, Fe-3 mass%Co, Fe-3 mass%Ni and Fe-0.8 mass%Al were selected as testing materials because they were thought to be basic alloys of weathering steels for the use in coastal environments. The steel foils were entirely transformed into rust to form rust membranes by processing more than 20 wet-and-dry cycles. The rust membranes were carefully attached to a dual-compartment cell for the measurement of membrane potential. Membrane potential generated by the difference in ionic diffusion rates of K+ and Cl- ions was measured as a function of concentration difference of KCl between solutions in the compartments separated by the membrane. The membrane potential thus measured was proved to be effective in evaluating the performance of rust formed on steel surface. The rust layer formed on the steels of Fe-3%Ni and Fe-1%W showed anion selectivity, while the rust on Fe-1%Co, Fe-3%Co, and Fe-0.8%Al steels, revealed cation selectivity. The addition of Co and Al to the steel decreases the corrosion rate because penetration of chloride ions into the rust is inhibited by the cation selective permeability of rust. The addition of Ni and W is known to be effective in decreasing corrosion rate of steel, despite their anion selective nature in rust. Alternative mechanisms other than ion selectivity are required for the elucidation of inhibition by Ni and W.

AB - Low-alloy steel foils of 20 μm thick were corroded under a cyclic wet-and-dry condition simulating highly corrosive coastal environment. Compositions of Fe-1 mass%Co, Fe-3 mass%Co, Fe-3 mass%Ni and Fe-0.8 mass%Al were selected as testing materials because they were thought to be basic alloys of weathering steels for the use in coastal environments. The steel foils were entirely transformed into rust to form rust membranes by processing more than 20 wet-and-dry cycles. The rust membranes were carefully attached to a dual-compartment cell for the measurement of membrane potential. Membrane potential generated by the difference in ionic diffusion rates of K+ and Cl- ions was measured as a function of concentration difference of KCl between solutions in the compartments separated by the membrane. The membrane potential thus measured was proved to be effective in evaluating the performance of rust formed on steel surface. The rust layer formed on the steels of Fe-3%Ni and Fe-1%W showed anion selectivity, while the rust on Fe-1%Co, Fe-3%Co, and Fe-0.8%Al steels, revealed cation selectivity. The addition of Co and Al to the steel decreases the corrosion rate because penetration of chloride ions into the rust is inhibited by the cation selective permeability of rust. The addition of Ni and W is known to be effective in decreasing corrosion rate of steel, despite their anion selective nature in rust. Alternative mechanisms other than ion selectivity are required for the elucidation of inhibition by Ni and W.

UR - http://www.scopus.com/inward/record.url?scp=0033650610&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033650610&partnerID=8YFLogxK

M3 - Article

VL - 64

SP - 767

EP - 770

JO - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals

JF - Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals

SN - 0021-4876

IS - 9

ER -