Effects of copper on the corrosion properties of low-alloy steel in an acid-chloride environment

Jang, Young-Wook; Hong, Jin; Kim, Jung-Gu

doi:10.1007/s12540-009-0623-5

Cited by 37 publications

(12 citation statements)

References 19 publications

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“…When the Cu content increased to 4.8 wt%, the pitting corrosion potential reduced and the corrosion and passive current densities slightly increased but within the same order of magnitude as that of Cu‐free stainless steel (Table ). These observations to some extent are consistent with previous reports that stainless steel with less than 5 wt% Cu addition did not significantly change the corrosion resistance . The possible reasons were the continuous deposition of Cu onto the stainless steel surface to create a barrier for further electrochemical corrosion in wet conditions .…”

Section: Discussionsupporting

confidence: 90%

“…These observations to some extent are consistent with previous reports that stainless steel with less than 5 wt% Cu addition did not significantly change the corrosion resistance. [9,19] The possible reasons were the continuous deposition of Cu onto the stainless steel surface to create a barrier for further electrochemical corrosion in wet conditions. [20] However, it has also been reported that chloride ions in the electrolyte can penetrate the surface passive layer, accumulate on the interface between metal and passive film and cause the passivity breakdown, [21] or initiate a break-down at defective sites such as grain boundaries and nonmetallic inclusion (e.g., MnS).…”

Section: Corrosion Resistance Of Cu-steelmentioning

confidence: 99%

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The Microstructure, Antimicrobial Properties, and Corrosion Resistance of Cu‐Bearing Strip Cast Steel

et al. 2020

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The antimicrobial and corrosion properties of Cu‐bearing steels fabricated via simulated strip casting are examined. Two distinct microstructures are observed: those alloys with Cu concentrations below 5 wt% retain the Cu in solid solution, and those alloys with high Cu concentrations form a two‐phase structure containing an austenite matrix and large Cu‐rich precipitates. The alloys display antimicrobial properties against Escherichia coli, causing up to 65% of bacteria death upon direct contact for 24 h. Surface analysis by X‐ray photoelectron spectroscopy indicates that after exposure to bacteria, the surface passive film remains enriched in Cu and its oxides, and immersion studies confirm gradual release of Cu ions from the passive film in a wet environment. Corrosion testing of the Cu alloys demonstrates that when the copper is retained in solid solution, the corrosion behavior is not markedly different from the copper‐free reference alloy. However, in those higher‐concentration alloys that contain Cu‐rich precipitates, the anticorrosion performance of the steel is greatly deteriorated, with the corrosion mechanism changing from pitting corrosion to selective corrosion.

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Section: Discussionsupporting

confidence: 90%

Section: Corrosion Resistance Of Cu-steelmentioning

confidence: 99%

The Microstructure, Antimicrobial Properties, and Corrosion Resistance of Cu‐Bearing Strip Cast Steel

et al. 2020

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“…In general, austenitic SS weld metals have inferior corrosion resistance compared with the base metals. Among the various factors that affect the corrosion resistance behavior of the weld metal, the alloying element affects the solidification behavior of the weld metals [5,6,7]. Especially, the Cr content is crucial in determining it's the electrochemical behavior in electrolyte solutions [8,9].…”

Section: Introductionmentioning

confidence: 99%

Influences of Cr/Ni equivalent ratios of filler wires on pitting corrosion and ductility-dip cracking of AISI 316L weld metals

Kim

Sung

et al. 2011

Met. Mater. Int.

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To study the pitting corrosion of AISI 316L weld metals according to the chromium/nickel equivalent ratio (Creq/Nieq ratio), three filler wires were newly designed for the flux-cored arc welding process. The weld metal with delta-ferrite at less than 3 vol.%, was observed for ductility-dip cracking (DDC) in the reheated region after multi-pass welding. The tensile strength and yield strength increased with increasing Creq/Nieq ratio. The result of anodic polarization tests in a 0.1 M NaCl solution at the room temperature (25) for 45 min, revealed that the base metal and weld metals have a similar corrosion potential of −0.34 VSCE. The weld metal with the highest content of Cr had the highest pitting potential (0.39 VSCE) and the passivation range (0.64 VSCE) was higher than the base metal (0.21 VSCE and 0.46 VSCE, respectively). Adding 0.001M Na2S to the 0.1 M NaCl solution, the corrosion occurred more severely by H2S. The corrosion potentials of the base metal and three weld metals decreased to −1.0 VSCE. DDC caused the decrease of the pitting potential by inducing a locally intense corrosion attack around the crack openings.

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“…[15] It has been reported that the addition of an alloying element Cu to low-alloy steels improved corrosion resistance of steel in an acidchloride solution. [16] But the effect of Cu on the mechanical properties and wear resistance of the lowalloy cast steels has not attracted much attention. So this study attempted to improve the corrosion-abrasion wear properties of the low-alloy MnSiCrB cast steels by adding Cu.…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Corrosion–Abrasion Wear Behavior of Low-Alloy MnSiCrB Cast Steels Containing Cu

Luo

Bai

2010

Metall Mater Trans A

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Two medium carbon low-alloy MnSiCrB cast steels containing different Cu contents (0.01 wt pct and 0.62 wt pct) were designed, and the effect of Cu on the mechanical properties and corrosion-abrasion wear behavior of the cast steels was studied. The results showed that the low-alloy MnSiCrB cast steels obtained excellent hardenability by a cheap alloying scheme. The microstructure of the MnSiCrB cast steels after water quenching from 1123 K (850°C) consists of lath martensite and retained austenite. After tempering at 503 K (230°C), carbides precipitated, and the hardness of the cast steels reached 51 to 52 HRC. The addition of Cu was detrimental to the ductility and impact toughness but was beneficial to the wear resistance in a corrosion-abrasion wear test. The MnSiCrB cast steel with Cu by the simple alloying scheme and heat treatment has the advantages of being high performance, low cost, and environmentally friendly. It is a potential, advanced wear-resistant cast steel for corrosion-abrasion wear conditions.

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Effects of copper on the corrosion properties of low-alloy steel in an acid-chloride environment

Cited by 37 publications

References 19 publications

The Microstructure, Antimicrobial Properties, and Corrosion Resistance of Cu‐Bearing Strip Cast Steel

The Microstructure, Antimicrobial Properties, and Corrosion Resistance of Cu‐Bearing Strip Cast Steel

Influences of Cr/Ni equivalent ratios of filler wires on pitting corrosion and ductility-dip cracking of AISI 316L weld metals

Mechanical Properties and Corrosion–Abrasion Wear Behavior of Low-Alloy MnSiCrB Cast Steels Containing Cu

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