Chemistry of corrosion products of Zn and MgZn pure phases under atmospheric conditions

Diler, Erwan; Rioual, Stéphane; Lescop, Benoît; Thierry, Dominique; Rouvellou, B.

doi:10.1016/j.corsci.2012.08.014

Cited by 84 publications

(56 citation statements)

References 20 publications

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“…A simple and cost-effective way of accomplishing these analytical tasks is using a monoatomic ion gun that removes the surface in layers by ion bombardment, as routinely employed in combination with surface sensitive techniques. Recently published studies (e.g., [1,2,3,4]) show that this concept continues to be of high relevance. However, the main drawback is that sputtering may cause sample modification and severe damage (e.g., by preferential sputtering, atomic mixing, or ion implantation, which leads in worst case to chemical changes) to the materials investigated, as already reported for potential corrosion products of Zn and Zn-based coatings [5], nanocomposite coatings [6], and organic materials [7].…”

Section: Introductionmentioning

confidence: 99%

XPS study of the effects of long-term Ar+ ion and Ar cluster sputtering on the chemical degradation of hydrozincite and iron oxide

et al. 2015

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Section: Introductionmentioning

confidence: 99%

XPS study of the effects of long-term Ar+ ion and Ar cluster sputtering on the chemical degradation of hydrozincite and iron oxide

et al. 2015

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“…The peaks at 714, 904, 1040, 1610, and 3490 cm −1 (Fig. 14a) are attributed to simonkollite, [55][56][57][58][59][60] while the peak at 1140 cm −1 is not assigned. In more detail, the three peaks at 714, 904, and 1040 cm −1 are related to O-H deformation vibrations of the simonkollite; the peak at 1610 cm −1 is related to deformation vibrations of O-H bonds in the incorporated water molecules; and the broad peak at 3490 cm −1 corresponds to stretching vibrations of O-H bonds.…”

Section: Resultsmentioning

confidence: 99%

“…59 The strong peaks at 1380 and 1480 cm −1 are related to the asymmetric stretching vibrations of the carbonate ion. 55 The broad peak at 3370 cm −1 is due to O-H stretching.…”

Section: Resultsmentioning

confidence: 99%

Aerosol Salt Particle Deposition on Metals Exposed to Marine Environments: A Study Related to Marine Atmospheric Corrosion

Hihara

2014

J. Electrochem. Soc.

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The characterization and corrosive effect of marine salt particles and seawater droplets that naturally deposited onto carbon steel and pure zinc that were exposed to marine test sites were studied. Most of the salt particles had diameters ranging from approximately 2-10 μm, and varied in their composition ranging from almost pure NaCl or KCl to mixtures of NaCl, KCl, CaCl 2 , and MgCl 2 . The differences in composition may depend on whether the seawater droplets dehydrate, crystallize, and fragment while airborne, or if they deposit as liquid droplets prior to crystallizing. The deposition of salt particles also decreased as the wind velocity decreased. The initial stage of marine atmospheric corrosion of the carbon steel and pure zinc induced by the salt deposition was also investigated. On the carbon steel substrate, NaCl-containing seawater droplets smaller than approximately 30 μm could not initiate corrosion even after 30 minutes of exposure; whereas, droplets larger than approximately 30 μm induced corrosion within approximately 30 minutes with lepidocrocite as the corrosion product. Corrosion initiated on the pure zinc samples under droplets of all sizes within 30 minutes. On the zinc samples, simonkollite formed in the central anodic region; whereas, hydrozincite formed in the peripheral cathodic region. Atmospheric corrosion has been extensively studied ever since W.H.J. Vernon's work in the 1920s. Its complexity is based on numerous influential parameters, including both meteorological and pollution parameters. Among these variables are the airborne sea salts in coastal regions (marine aerosols), which are generated either in the open sea or the surf zone.1-3 Marine aerosols consisting of wet aerosols, partially wet aerosols, and non-equilibrium aerosols depending on the atmosphere humidity, 4 are carried by the wind and can reach offshore structures and greatly accelerate the corrosion of metals. The sizes of the three types of aerosols and the resultant dry aerosols were estimated by Cole et al. 4 The amount of marine aerosols present in a specific marine atmosphere, known as airborne salinity, is usually measured in both atmospheric and corrosion studies. For corrosion studies, correlating marine salinity and metallic corrosion is a major focus. By compiling worldwide research on atmospheric corrosion that was conducted in the last 40 years, Morcillo et al. 5 reported that the metallic corrosion rate increases fastest with respect to chloride deposition when its values are between 100 and 400 mg Cl − /m 2 /day, and slower when the chloride deposition is less than 100 mg Cl − /m 2 /day or more than 400 mg Cl − /m 2 /day. Studies have also focused on the behavior of marine aerosols, including their production, transport and deposition. 1,6,7 Cole et al.1 proposed a comprehensive model that requires the input of significant amounts of data; whereas, Meira et al. 7 generated a simplified model that depends only on aerosol characteristics and has wind velocity and distance from the sea as independent va...

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“…The main zinc corrosion products on this case can be zinc oxide, zinc hydroxide, zinc carbonate (more protective than zinc hydroxide), zinc hydroxycarbonate complexes etc. [12][13][14].…”

Section: Case 1: Corrosion Of Fresh Zinc Coating Without Defectsmentioning

confidence: 99%

“…This is a class of metal rich coatings which gives both barrier and galvanic protection to the underlying metal substrates. Various zinc rich coatings with diverse modifications have been introduced and are investigated for their corrosion protection performance by different research groups [2][3][4][5][6][7][8][9][10][11][12][13]. The zinc dust (usually spherical or lamellar shape or combination of both) is dispersed in an inorganic or organic binder (usually epoxies) [6].…”

Section: Introductionmentioning

confidence: 99%

Benchmarking of Zinc Coatings for Corrosion Protection: A Detailed Characterization of Corrosion and Electrochemical Properties of Zinc Coatings

Wijesinghe¹,

Tan²

2017

Corrosion Science and Technology

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Due to various types of Zn coatings for many decades for various applications, it is imperative to study and compare their corrosion resistance properties of some of these. Here, we introduce a systematic methodology for evaluation and validation of corrosion protection properties of metallic coatings. According to this methodology, samples are were exposed in an advanced cyclic corrosion test chamber according to ISO 14993, and removed at the end of each withdrawal for respective corrosion and electrochemical characterization to evaluate both barrier and galvanic protection properties. Corrosion protection properties of coatings were evaluated by visual examination according to ISO 10289, mass loss and subsequent corrosion rate measurements, electrochemical properties, and advanced electrochemical scanning techniques. In this study, corrosion protection properties of a commercial zinc rich coating (ZRC) on AISI 1020 mild steel substrates were evaluated and benchmarked against hot dip galvanized (HDG). Results were correlated, and corrosion protection capabilities of the two coatings were compared. The zinc rich coating performed better than hot dip galvanized coating in terms of overall corrosion protection properties, according to the exposure and experimental conditions used in this study. It proved to be a suitable candidate to replace hot dip galvanized coatings for desired applications.

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Chemistry of corrosion products of Zn and MgZn pure phases under atmospheric conditions

Cited by 84 publications

References 20 publications

XPS study of the effects of long-term Ar+ ion and Ar cluster sputtering on the chemical degradation of hydrozincite and iron oxide

XPS study of the effects of long-term Ar+ ion and Ar cluster sputtering on the chemical degradation of hydrozincite and iron oxide

Aerosol Salt Particle Deposition on Metals Exposed to Marine Environments: A Study Related to Marine Atmospheric Corrosion

Benchmarking of Zinc Coatings for Corrosion Protection: A Detailed Characterization of Corrosion and Electrochemical Properties of Zinc Coatings

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