Zum Rosten des Eisens

Worch, H.; Forker, W.; Rahner, D.

doi:10.1002/maco.19830340806

Cited by 11 publications

(5 citation statements)

References 29 publications

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“…Worch et al reported in 1983 [173] that GR1 is often seen on iron and steel exposed to marine environments and that chloride may also be involved catalytically in the formation of akaganeite. Akaganeite is produced only in the presence of sufficient concentrations of Cl − [107,108].…”

Section: Mechanisms Of Steel In Macmentioning

confidence: 99%

Marine Atmospheric Corrosion of Carbon Steel: A Review

Alcántara¹,

Fuente²,

Chico³

et al. 2017

Materials

260

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The atmospheric corrosion of carbon steel is an extensive topic that has been studied over the years by many researchers. However, until relatively recently, surprisingly little attention has been paid to the action of marine chlorides. Corrosion in coastal regions is a particularly relevant issue due the latter’s great importance to human society. About half of the world’s population lives in coastal regions and the industrialisation of developing countries tends to concentrate production plants close to the sea. Until the start of the 21st century, research on the basic mechanisms of rust formation in Cl−-rich atmospheres was limited to just a small number of studies. However, in recent years, scientific understanding of marine atmospheric corrosion has advanced greatly, and in the authors’ opinion a sufficient body of knowledge has been built up in published scientific papers to warrant an up-to-date review of the current state-of-the-art and to assess what issues still need to be addressed. That is the purpose of the present review. After a preliminary section devoted to basic concepts on atmospheric corrosion, the marine atmosphere, and experimentation on marine atmospheric corrosion, the paper addresses key aspects such as the most significant corrosion products, the characteristics of the rust layers formed, and the mechanisms of steel corrosion in marine atmospheres. Special attention is then paid to important matters such as coastal-industrial atmospheres and long-term behaviour of carbon steel exposed to marine atmospheres. The work ends with a section dedicated to issues pending, noting a series of questions in relation with which greater research efforts would seem to be necessary.

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Section: Mechanisms Of Steel In Macmentioning

confidence: 99%

Marine Atmospheric Corrosion of Carbon Steel: A Review

Alcántara¹,

Fuente²,

Chico³

et al. 2017

Materials

260

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“…Numerous investigations have been made (e.g., [35][36][37][38][39][40][41][42] of the principal reactions involved in anodic oxidation and corrosion of iron and steel. While of substantial value, the work has been limited in two ways.…”

Section: Chemical Mechanisms Of Iron and Steel Corrosionmentioning

confidence: 99%

“…The rust layers generally include an inner region of dense, amorphous FeOOH and some crystalline Fe304 (magnetite), and an outer loose, crystalline assemblage of a-FeOOH (goethite), ~-FeOOH (lepidocrocite), and ~-Fe203 (maghemite) (20). In some environments, other constituents are favored: for example, ~-FeOOH (akaganeite) apparently is produced only in the presence of sufficient concentrations of chloride (35).…”

Section: Chemical Mechanisms Of Iron and Steel Corrosionmentioning

confidence: 99%

Corrosion Mechanisms for Iron and Low Alloy Steels Exposed to the Atmosphere

Graedel

Frankenthal

1990

J. Electrochem. Soc.

141

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Despite extensive study over the years, the chemical processes involved in the atmospheric corrosion of iron and its alloys remain poorly understood. Most conceptual studies have ignored the chemical influence of the trace anions (CI-, NO~ , SO42-, CO2H , etc.) present in the atmosphere and in precipitation. This review, presented from the perspective of atmospheric chemistry and mineralogy, provides an analysis of rust layer formation, evolution, morphology, and composition, together with information on iron-containing minerals and other crystalline structures that are likely to be present. The chemical reactions involved in the formation of these constituents during the corrosion process are then presented. The reactions are not spatially homogeneous, but favor pits, voids, and crevices in the metal surface. It is demonstrated that (i) the pH of the moisture on the surface is crucial to the corrosion process, since it controls the dissolution of the passive oxyhydroxide surface; the pH is largely controlled by atmospheric SO2 and NOx dissolved in the moisture or by fog or rain deposited on the surface; (ii) the extant data suggest that the rate of iron oxyhydroxide formation is slow; hence, the presence of reactive anions generally results in their blending into mixed hydroxy-anion products; (iii) the interactive chemistry of readily available hydrogen peroxide and bisulfite ion in the aqueous surface film can either enhance or impede the rate of corrosion; (iv) photon-driven reactions can promote the corrosion of iron and its alloys. This analysis unifies the analytical information, as well as the data on kinetic processes, and provides the basis for a full understanding of the atmospheric corrosion of iron and low alloy steels.

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“…Redox processes involving iron hydroxide layers are of particular interest in corrosion and passivity of ferrous materials [1][2][3][4][5][6][7][8] and in the charge/discharge cycles of the negative electrode in Ni-Fe battery cells [9][10][11][12]. The available literature on those reactions is concerned mostly with kinetic data resulting from different types of oxide layers in contact with iron electrodes [1][2][3][4][5][6][7][8][13][14][15][16][17][18][19]. Although the structure of these layers has been extensively investigated both in situ [20][21][22][23][24][25][26][27][28][29][30][31] and ex situ [32][33][34][35], it is still highly controversial.…”

Section: Introduction 2 Experimental Detailsmentioning

confidence: 99%

Redox processes at iron hydroxide layers formed on platinum substrates in alkaline solutions

et al. 1990

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Redox processes taking place at precipitated hydrous iron hydroxide layers chemically formed on platinum substrates in sodium hydroxide solutions are investigated at 25 ~ C. The electrochemical behaviour of these layers depends considerably on the electroreduction level reached in chargedischarge cycles. The accumulation of Fe 304 during oxidation-reduction cycles can produce an increasing irreversibility of the Fe(II)/Fe(III) redox couple. Data are compared to results obtained with iron hydroxide layers formed by electrochemical and chemical methods on massive iron electrodes. Results are discussed in terms of a composite structure for the iron hydroxide layers.

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Zum Rosten des Eisens

Cited by 11 publications

References 29 publications

Marine Atmospheric Corrosion of Carbon Steel: A Review

Marine Atmospheric Corrosion of Carbon Steel: A Review

Corrosion Mechanisms for Iron and Low Alloy Steels Exposed to the Atmosphere

Redox processes at iron hydroxide layers formed on platinum substrates in alkaline solutions

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