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Showing papers in "Corrosion Science in 1983"


Journal ArticleDOI
TL;DR: In this paper, isolated rust layers have been investigated by electrochemical methods to find out whether their reduction and re-oxidation can affect the atmospheric corrosion of iron, and the results showed that the reduced surface layer can be easily oxidized back to γ-FeOOH, magnetite can partly be oxidized to Fe 2 O 3.

262 citations


Journal ArticleDOI
TL;DR: In this article, the a.c. impedance of thin polymer films on aluminum alloys, steel, and phosphated steel has been determined over a wide frequency range, resulting in a general model for the electrochemical impedance across the coated surfaces.

243 citations


Journal ArticleDOI
TL;DR: In this article, four distinct polarization regions are identified and characterized in terms of the tendency for selective dissolution, surface enrichment of the more noble component and the stability of a planar surface.

243 citations


Journal ArticleDOI
TL;DR: In this article, the kinetics of repassivation of Type 304L austenitic stainless steel in 10 M KOH solution have been studied as a function of applied potential, and the technique used involves analysis of the current transients that result from rapid mechanical removal of the pre-existing oxide film while the metal is held at constant potential.

155 citations


Journal ArticleDOI
TL;DR: In this paper, the authors reviewed the characteristics of existing specimens and then described the development of a new design, and both the practical, including monitoring, and mechanistic significance of electrochemical measurements in flowing environments are discussed.

137 citations


Journal ArticleDOI
TL;DR: In this article, the growth of porous magnetite on carbon steel in high temperature chloride solution has been studied using the a.c. impedance technique, and the frequency dispersion of the impedance of the growing film has been successfully accounted for by a finite transmission line model.

135 citations


Journal ArticleDOI
TL;DR: The extent of information on the solution composition and electrode potential in pits, crevices and cracks has been reviewed in this article, where the pH values in the cavities are interpreted on the basis of the nature of the electrode reactions in the cavity and the hydrolysis of dissolved metal cations.

131 citations


Journal ArticleDOI
TL;DR: In this article, the authors studied the inhibition of the corrosion of Al4Cu alloy (B26S) in solutions of hydrochloric acid by some N -heterocyclic compounds.

128 citations


Journal ArticleDOI
TL;DR: In this paper, the authors examined the corrosion fatigue of the aluminium-zinc-magnesium alloy 7017-T651 in seawater at frequencies from 0.1 to 70 Hz and found that the changes in fracture mode observed at certain critical crack velocities, and their dependence upon the square root of the reciprocal of the frequency of loading, are consistent with an environment-enhanced crack growth rate involving diffusion of hydrogen ahead of the crack tip during each fatigue cycle.

103 citations


Journal ArticleDOI
TL;DR: In this paper, the corrosion behavior of copper-nickel alloys in unpolluted and sulphide-polluted seawater has been investigated and it was demonstrated that the co-presence of sulphide and oxygen in seawater results in corrosion rates much higher than those measured when the alloy is exposed alternately to sulphides and oxygen.

93 citations


Journal ArticleDOI
TL;DR: In this article, the passive film was composed predominantly of 8-FeOOH with 10-20% γ-FeOH and possibly some α-FeOILH and the Raman spectra from different depths of the surface were identical.

Journal ArticleDOI
TL;DR: In this article, the development of internal oxides and intergranular oxides in dilute Ni-Cr alloys, containing 1-5% Cr, in NiNiO packs and in 1 atm oxygen at 800-1100°C has been investigated.

Journal ArticleDOI
TL;DR: In this article, a mechanistic crack growth model based on hydrogen-induced cracking has been proposed, where anodic dissolution creates the conditions for hydrogen absorption at the crack tip and explains why inclusions form a preferred crack path and accounts for the effect of sulfur on crack growth rate both in PWR and BWR conditions.

Journal ArticleDOI
TL;DR: CIRFIT as discussed by the authors is a computer analysis of electrochemical impedance data, which minimizes the sum of squares of the radial difference between observed and calculated impedance data presented in either the complex impedance or admittance plane.

Journal ArticleDOI
TL;DR: In this paper, the authors give an extensive electrochemical description of the Al2Cu compound and explain the reported discrepancies, and show that the existence of a passive state is possible at the stability of aluminium hydroxide, copper hydroxides, depending on the potential value and on the pH value of electrolytes.

Journal ArticleDOI
TL;DR: In this article, the wedging stresses generated by the formation of insoluble corrosion products have been measured during the exfoliation corrosion of the high strength aluminium alloy L95, and it has been concluded that the degradation occurs by a stress corrosion mechanism.

Journal ArticleDOI
TL;DR: In this paper, the effect of thio-urea and its derivatives on the anodic dissolution of mild steel in HCl solutions has been studied, and the results show that thiourea derivatives exert increasing anodic polarisation with increasing concentration.

Journal ArticleDOI
TL;DR: The results of recent experiments on measuring corrosion fatigue crack propagation rates in structural steel immersed in seawater with and without cathodic polarisation are reported in this article, where measurements of electrochemical potentials near the growing crack tip are used to learn more about the mechanisms and rate-determining processes influencing the rate of crack growth.

Journal ArticleDOI
TL;DR: In this paper, the pitting resistance of AISI 316 stainless steel after passivation in diluted nitric acid was studied in comparison with that of non-passivated specimens.

Journal ArticleDOI
TL;DR: In this article, the reaction of high purity nickel with SO 2 + O 2 mixtures at 500-900°C has been studied and it is concluded that the reaction mechanism involves an SO 3 adsorption equilibrium on the surface followed by formation of NiSO 4.

Journal ArticleDOI
TL;DR: In this article, polycrystalline copper has been exposed to the atmospheric gases hydrogen sulfide, carbonyl sulfide (OCS), carbon disulfide (CS2), and sulfur dioxide (SO2) under carefully controlled laboratory conditions.

Journal ArticleDOI
TL;DR: In this article, the surface enrichment process of alkali and alkaline earth elements that take place during annealing at higher temperatures (250-340°C) was studied.

Journal ArticleDOI
TL;DR: In this article, the rate of anodic film growth on freshly generated 304L stainless steel surfaces is presented as a function of electrode potential and pH, and the kinetics are controlled by ion migration under high electric field, with two distinct sequential kinetic regions.

Journal ArticleDOI
TL;DR: In this article, the porosity of hot-pressed stainless steel (HPSS) of Type 316 was investigated by potentiodynamic polarization, open circuit potential, identification of corrosion products by EDAX and SEM observation.

Journal ArticleDOI
TL;DR: In this article, the combined effects of cathodic potentials and slow, monotonic straining on the tensile ductility and fracture morphology of X-65 pipeline steel parent plate have been investigated in aerated 3.5% NaCl solution.

Journal ArticleDOI
TL;DR: Mossbauer spectroscopy was used to study corroded iron after treatment with phosphoric acid or commercial rust transformers as discussed by the authors, which produced normal iron phosphates from metallic iron, hematite and FeO, and acid ferric phosphate FeH 3 (POI4I)I2I.


Journal ArticleDOI
Hugh H Horowitz1
TL;DR: In this article, it was shown that S 4 O 6 2− and S 2 O 3 2− do not function simply as sources of sulfide to promote hydrogen permeation and embrittlement.

Journal ArticleDOI
TL;DR: In this article, the influence of cold working on the corrosion behavior of AISI 304L in HCl 0.1 M at room temperature was investigated and it was shown that even though cold working lowers the critical pitting potential, it does not impair the susceptibility to localized corrosion.

Journal ArticleDOI
TL;DR: In this paper, the performance of the intermetallic compound Al 8 Mg 5, of importance in the selective corrosion of Al-Mg alloys, was investigated electrochemically.