Über die Wirkung des Magnetits beim atmosphärischen Rosten und beim Unterrosten von Anstrichen

Schwarz, Hans Joachim

doi:10.1002/maco.19720230805

Cited by 39 publications

(8 citation statements)

References 30 publications

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“…The free energy of these phase conversions is likely to be small, however, since it has been shown that the free energy for the conversion of goethite and hematite each of particle size 100A and 300A is -1.6 and -0.4Kcals mol-1 respectively. SCHWARZ (1972) has determined the free energy of formation of a and y-FeOOH to be -114 .8 and -112.1 Kcals mol', although HASHIMOTO and MISAWA (1973) found the free energy of formation of y-FeOOH to be -112 .5 Kcals mol-1. LANGMUIR (1969a), on the other hand, has determined the free energies of formation of a-FeOOH, y-FeOOH and amorphous Fe(OH)3 to be in the ranges -115. mol' respectively.…”

Section: Resultsmentioning

confidence: 99%

The secondary iron oxidehydroxide mineralogy of some deep-sea and fossil manganese nodules: A Moessbauer and X-ray study.

Johnston

Glasby

1978

Geochem. J.

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Mossbauer spectroscopy utilizing precise computer-based curve fitting procedures and X-ray diffrac tion methods have been used to study four deep-sea and one fossil marine manganese nodule. They have shown that X-ray amorphous goethite (a-FeOOH) and probably akaganeite (P-FeOOH) are the secondary iron oxidehydroxide phases present in the deep-sea nodules. The fossil nodule contained goethite with a larger particle size (approx. 350A) which had presumably been formed by the recrystallization of X-ray amorphous goethite and/or the alteration of the metastable akaganeite.

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Section: Resultsmentioning

confidence: 99%

The secondary iron oxidehydroxide mineralogy of some deep-sea and fossil manganese nodules: A Moessbauer and X-ray study.

Johnston

Glasby

1978

Geochem. J.

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“…Both phases are associated to the diffraction angle at 35° [ 118 ]. Both phases are usually detected in the inner part of the rust adhering to the steel surface, where oxygen depletion can occur [ 119 , 120 ].…”

Section: Atmospheric Corrosion Productsmentioning

confidence: 99%

“…Spinel phase (magnetite and/or maghemite) may form by oxidation of Fe(OH) 2 or intermediate ferrous-ferric species such as green rust [ 119 ]. It may also be formed by lepidocrocite reduction in the presence of a limited oxygen supply [ 120 ] according to: 2γ-FeOOH + Fe 2+ →Fe 3 O 4 + 2H + , …”

Section: Atmospheric Corrosion Productsmentioning

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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“…is also formed as one of the main constituents. Magnetite is usually detected in the inner part of rust adhering to the steel surface of specimens that have been subjected to prolonged exposure, where oxygen depletion may occur [53,54].…”

Section: Magnetite (Fe 3 O 4)mentioning

confidence: 99%

Weathering steels: From empirical development to scientific design. A review

Morcillo¹,

Díaz²,

Chico³

et al. 2014

Corrosion Science

240

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The design of the first weathering steels was purely empirical and focused on a small number of conventional alloying elements such as manganese, silicon, chromium, nickel, copper and phosphorus, mainly. The environmental conditions that promote the formation of protective rust layers: existence of wet/dry cycling, absence of very long wetness times, atmospheres without a marine component, etc., were identified by trial and error. This paper makes a bibliographic review of the abundant literature that has been published on the atmospheric corrosion of weathering steels, setting out in chronological order the advances made in the scientific knowledge of important matters such as: atmospheric corrosion mechanisms of weathering steel, formation of protective rust layers, and the role played by alloying elements. The work ends with an overview of the scientific design of new weathering steels, placing special emphasis on the new compositions developed for application in marine atmospheres.

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Über die Wirkung des Magnetits beim atmosphärischen Rosten und beim Unterrosten von Anstrichen

Cited by 39 publications

References 30 publications

The secondary iron oxidehydroxide mineralogy of some deep-sea and fossil manganese nodules: A Moessbauer and X-ray study.

The secondary iron oxidehydroxide mineralogy of some deep-sea and fossil manganese nodules: A Moessbauer and X-ray study.

Marine Atmospheric Corrosion of Carbon Steel: A Review

Weathering steels: From empirical development to scientific design. A review

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