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Showing papers in "Corrosion Science in 1969"


Journal ArticleDOI

128 citations


Journal ArticleDOI
TL;DR: In this paper, a Fe-Fe-Analogon zum basischen MgFe-Karbonat Pyroaurit bzw. Ni-Fe -R Reevesit was darstellt.

125 citations


Journal ArticleDOI
Carl Wagner1
TL;DR: The distribution of cations in metal oxides and metal sulphide solutions formed during the oxidation of alloys at elevated temperatures varies with distance from the alloy-scale interface inasmuch as cations having a greater mobility are enriched near the scale-gas interface.

124 citations


Journal ArticleDOI
TL;DR: In this article, the results are discussed in relation to welding and continuous casting of steel, and the results show that steel composition is of little or no importance for general corrosion but exerts a deciding influence on local corrosion, such as corrosion at welds, crevice corrosion and pitting.

101 citations


Journal ArticleDOI
TL;DR: In this article, electron microprobe investigations showed that corrosion pits in a commercial austenitic 18%Cr-9%Ni steel are initiated at the mixed manganese and iron sulphide inclusions.

84 citations


Journal ArticleDOI
TL;DR: In this article, the saturation solubility of hydrogen in steel has been investigated by cathodically charging steel specimens in solutions of different pH values containing various promoters, and it has been established that the pH vurve for each promoter rises to a maximum [H]max and then decreases with an increase in pH.

82 citations


Journal ArticleDOI
TL;DR: In this article, the presence of steam has been found to accelerate the oxidation in oxygen of mild steel and two grades of pure iron of varying purity, and the effect was found to be greater on round test pieces than on flat rectangular ones.

81 citations


Journal ArticleDOI
TL;DR: In this paper, the authors used plan and scanning electron microscopy to study the alloy-oxide interface after oxidation of Fe Cr Si and Fe Cr Y alloys in 1atm oxygen at 1000-1300°C.

66 citations


Journal ArticleDOI
TL;DR: The thermodynamic conditions required for the simultaneous attack of metals and alloys by oxygen and another oxidant have been examined in this paper, and it has been found that oxide scales should usually be formed on the metal surface because of the larger affinity of most metals for oxygen compared to that of other oxidants.

63 citations


Journal ArticleDOI
TL;DR: In this article, the authors studied the corrosion of pure Ni sheet by controlled mixtures of SO 2 + oxygen in the temperature range 500-750 °C. The mechanism was usually of the parabolic diffusion-controlled type, but at the highest rates of attack the process had linear kinetics.

63 citations


Journal ArticleDOI
TL;DR: In this article, the oxidation behavior of Fe Ni alloys is divided into four major compositional ranges on the basis of the type of scale formed: 0-2%Ni, 2-35%Ni and 35-80%Ni.

Journal ArticleDOI
TL;DR: In this article, a mechanism involving vapour-phase transport for the oxidation of Fe and mild steel in steam and in CO2 is proposed, supported by scanning electron micrographs of mild steel oxidized in steam.

Journal ArticleDOI
TL;DR: C content and microstructure effect on electrochemical parameters of Fe and steels in dilute sulfuric acid, discussing Tafel constants and current density was discussed as mentioned in this paper, where the authors also discussed the effect of the micro-structure on the current density.


Journal ArticleDOI
TL;DR: In this paper, a mechanism for the formation of irregular pits is proposed, probably caused by the presence of carbides on grain boundaries, and the current-time relationship of the form i = kt3 was in general not obeyed.

Journal ArticleDOI
TL;DR: In this paper, the simple oxidation of a binary alloy to form an adherent and uniform scale (A 2 O m ) was examined theoretically, using the finite difference method, and compared with observations of the oxidation behaviour of Fe Cr alloy at 1250°K in the composition range 20-100%Cr.

Journal ArticleDOI
TL;DR: In this paper, the relaxation of fine Al wires has been investigated under constant load and constant strain conditions in order to study mechanical effects associated with the application of an anodic electric field.

Journal ArticleDOI
TL;DR: In this paper, the corrosion behavior of Fe and of some binary Fe alloys containing approximately 5wt.% of Ni, Co, Cr or Al has been studied in S vapour at 500°C as a function of S pressure within the range 0·1-100 torr.

Journal ArticleDOI
TL;DR: In this article, an elektrochemische und metallographische Untersuchungen zur Lochfraβkorrosion an Nickel-Einkristallelektroden der Orientierung (100), (110) and (111) in O 2 -freier 0,5m NiCl 2 -Losung berichtet.

Journal ArticleDOI
TL;DR: In this article, the stresses developed during high temperature oxidation of Fe-Cr alloys have been detected by the deflections of thin strip specimens oxidized on one side only, despite the limitations of the platinum layer used to protect one side from oxidation, some significant comparative results have been obtained.

Journal ArticleDOI
S. Barnartt1
TL;DR: In this paper, an analytical expression for the deviation of the linear polarization curve from the true curve is derived for the kinetic origin of extended linear polarization curves for corroding electrodes and it is shown that the ranges of validity of both anodic and cathodic linear polarities are less than 3mV at some electrodes, e.g. Fe-acid under charge-transfer control.

Journal ArticleDOI
TL;DR: In this paper, a generalized mechanism for the passivation of lead is proposed, consisting of formation of a film of the corresponding salt, subsequent coverage of residual small areas of the exposed metal with PbO, further oxidation of the composite surface film to pbO 2 and O 2 evolution on a surface covered with pb

Journal ArticleDOI
TL;DR: In this paper, the effects of different sterilization procedures on the subsequent corrosion rates of four metals now used in the human body were described, including stainless steels, titanium, and Vitallium (a Co Cr W Ni alloy).

Journal ArticleDOI
TL;DR: In this article, the structure and properties of anodic Al2O3 films grown in a borate solution have been investigated using electron microscopy, spectrophotometry and electrical techniques.

Journal ArticleDOI
TL;DR: In this article, the anodic behavior of Ni in 1, 2, 5, 7, 7·5, 10, 12·5 and 14, 15 and 18M H2SO4 has been studied by means of anodic polarization curves.

Journal ArticleDOI
TL;DR: In this article, the formation of metallic diffusion coatings on ferrous metals is considered. And the role of the coatings' composition and structure is also considered, as well as the factors determining which metals are able to form diffusion coating and the methods of application available.

Journal ArticleDOI
R. Otsuka1, M. Uda1
TL;DR: A mechanism for the formation of cuprite under the reducing condition is postulated in this article, which is also observed with Monel metal, but in this case the nobler metal Cu accumulates on the surface to form the same type of corrosion products as cuprite.

Journal ArticleDOI
TL;DR: In this paper, the temperature rise of a thin Al wire has been measured during anodic oxidation, as the temperature of the wire closely follows that of the oxide, the temperature in the oxide can be determined.

Journal ArticleDOI
TL;DR: In this article, a series of experiences complementaires complementaires of the radiocarbone 14 have been presented, with the aim of finding out whether le carbone is insoluble in l'oxyde or not.

Journal ArticleDOI
TL;DR: In this paper, an etude de loxydation a l'air d'alliages Fe C a ete effectuee, en utilisant l'analyse metallographique et spectrographique, en determiner les mecanismes qui gouvernent la carburation and la decarburation.