Showing papers in "Corrosion Science in 2000"

TL;DR: In this article, the effect of 2,5-disubstituted-1,3,4-oxadiazoles on the corrosion of mild steel in 1M HCl and 0.5 M H2SO4 was investigated by various corrosion monitoring techniques.

TL;DR: In this paper, the effect of microconstituents on the corrosion and electrochemical behaviour of AZ91D alloy prepared by die-casting and ingot casting route has been investigated in 3.5% NaCl solution at pH 7.25.

TL;DR: In this article, a probable reaction mechanism is proposed to interpret theoretically how hydrogen sulfide inhibits the corrosion of iron, which is attributed to formation of ferrous sulfide (FeS) protective film on the electrode surface.

TL;DR: In this article, the corrosion protection afforded by cerium, lanthanum and praseodymium conversion coatings formed on pure magnesium and a magnesium alloy, WE43, has been studied using dc polarisation and ac impedance techniques.

TL;DR: In this article, a theoretical assessment of the influence of binding when chloride ingress results from diffusion is presented, which is the result of the effect on the pore solution chemistry of the pH dependent solubilities of solid phases containing bound chloride.

TL;DR: In this article, the corrosion behavior of Fe, Cr, Ni, the ferritic alloys Fe 15Cr and Fe 35Cr and the austenitic alloys Alloy 800, Alloy 825 and Alloy 600 at temperatures between 400 and 700°C using discontinuous exposures and thermogravimetric experiments.

TL;DR: In this article, the surface potential of shell-shaped particles was measured by means of atomic force microscopy (AFM) scanning potential technique, which showed a large difference in potential between the core and the shell, which resulted in a highly localized galvanic coupling.

TL;DR: In this article, the duplex character of the oxide films formed on 316L stainless steel and Alloy 690 was analyzed in high temperature aqueous environments at pH 8 and 10.

TL;DR: In this paper, the oxide films formed on AISI type 304 stainless steel in the temperature range between 50 and 450°C, have been studied by Auger electron spectroscopy, capacitance measurements and photoelectrochemistry.

TL;DR: In this article, the effect of 3,6-bis(2-methoxyphenyl)-1,2-dihydro-1, 2,4,5-tetrazine (2-MDHT) on the corrosion of mild steel in acidic media has been investigated by weight loss and various electrochemical techniques.

TL;DR: In this paper, the inhibition efficiency of natural honey on the corrosion of C-steel, which used in manufacturer of petroleum pipelines, in high saline water was evaluated using weight loss measurements and potentiostatic polarization technique.

TL;DR: In this paper, the effect of six organic phosphonium compounds of the structure Ph3P+Y X−, (Ph = phenyl, x = Br or Cl; and y = propyl, propargyl, cyclopropyl, allyl, 1,3-dioxolanyl and cinnamyl), on the corrosion of mild steel in aerated 1 M HCl and 0.5 M H2SO4 solutions was studied using potentiodynamic and EIS techniques.

TL;DR: The role of these bacteria in influencing the corrosion of carbon steel is highlighted in this article, where it is inferred that iron bacteria (Leptothrix sp.) and SRB (Desulfovibrio sp.) are responsible for the corrosion.

TL;DR: In this paper, the pH dependent solubility of chloride in concrete is demonstrated and it is shown that most of the bound chloride is released as the result of the rapid dissolution of at least two hydrated phases in chloride contaminated OPC concrete.

TL;DR: In this paper, bipyrazolic compounds were synthesised and tested as a corrosion inhibitors of Armco Iron in 1 M HCl medium using weight loss, electrochemical polarisation and impedance measurements.

TL;DR: In this paper, the influence of winds on the salinity values recorded at a testing site located on the coast of Tarragona (Spain) was investigated and it was found that there are certain marine wind directions (referred to here as "saline winds") which especially contribute to the entrainment of marine aerosol from the sea towards the land.

TL;DR: In this article, a high frequency capacitive loop related to the charge transfer due to dissolution of the metal, an inductive loop at medium frequency which was attributed to surface roughening and a second capacive loop obtained at low frequency which has been ascribed to the adjustment of the surface film to the change in potential resulting in higher charge transfer resistance.

TL;DR: Mendoza et al. as mentioned in this paper performed a study of the atmospheric corrosion of copper, zinc and aluminium exposed on three test sites indoors and outdoors (coastal, urban industrial and rural) under different exposure conditions up to 18 months.

TL;DR: In this article, the passive film anodically formed on iron in 0.1 mol l − 1 sodium borate solution has been evaluated by electrochemical impedance spectroscopy, and the Mott-Schottky representation was used to plot the capacitance as a function of the applied potential.

TL;DR: In this paper, the iron rust phase formed on low alloy steels has been analyzed by using EPMA, XPS, TEM and alternating current impedance methods after wet/dry corrosion tests using 0.5 mass% NaCl solution.

TL;DR: In this article, the pitting potentials of 316 stainless steel were measured in 1 M NaCl at 70°C and were shown to vary with the concentration of the pre-treatment; increasing with concentration up to 25 wt% and then decreasing as the acid concentration was further increased.

TL;DR: In this paper, polarisation measurements revealed that the graphite causes an increase in the titanium's corrosion rate, and therefore the extent that graphite can be used in porous titanium biomaterials will be a compromise between the benefits of improved friction properties against the disadvantage of increased corrosion.

TL;DR: In this paper, the effect of a new organic molecule with chelating groups on the corrosion behavior of zinc was investigated by means of electrochemical impedance spectroscopy (EIS), as well as polarization curves using a rotating disk electrode.

TL;DR: In this article, the corrosion behavior of a galvanized steel was investigated under cyclic wet-dry environments using electrochemical techniques, and the corrosion mass loss Δ M, which was obtained from the i corr vs time curve, was plotted vs the wet dry cycle number.

TL;DR: In this paper, the authors applied Electrochemical impedance spectroscopy (EIS) technique to the corrosion study of the anodic coatings (ANC) on zinc, and compared the corrosion of both ANC-coated zinc and CoANC-ZN.

TL;DR: In this article, the nature of the protective passive layer on the corrosion resistant Delhi iron pillar (DIP) has been addressed based on a detailed characterization of its rust, and the role of slag particles in the matrix of the DIP iron in enhancing the passive film formation is briefly addressed initially.

TL;DR: In this article, an imidazoline-based corrosion inhibitor is applied in a large diameter flow loop system and the Warburg diffusion parameter, b f =σω −1/2 was used to qualitatively analyze inhibitor films formed on the metal surface.

TL;DR: In this paper, X-ray diAraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Mossbauer spectrographs were used to identify the amorphous form of iron oxides/oxyhydroxides.

TL;DR: In this paper, a finite element model for simulating the transport behaviour of ions in a porous medium when a constant DC current density is applied through electrode pairs emplaced in the medium is presented.

TL;DR: In this article, the presence of pyrazole changes the mechanism of copper dissolution in 0.1 M HCl and showed that pyrazoles behaves like a cathodic inhibitor and the inhibition efficiency is influenced by mass transport.