Showing papers in "Corrosion Science in 2004"

TL;DR: The literature dealing with the electrochemical corrosion characteristics of unalloyed copper in aqueous chloride media is examined in this paper, where a wide range of electrode geometries, the importance of the chloride ion and the mass transport of anodic corrosion products on the corrosion behaviour of copper are made clear for both freshly polished and ‘filmed’ surfaces.

TL;DR: In this paper, the inhibition effects of tryptamine (TA) on the corrosion behavior of ARMCO iron in 0.5 M deaerated H2SO4 (in the 25-55 °C temperature range) was studied in both short and long time tests (1, 24 and 72 h) by means of potentiodynamic curves (PCM) and electrochemical impedance spectroscopy (EIS).

TL;DR: In this paper, the effect of different degrees of carbonation and the presence of several chloride contents in the simulated pore solutions was investigated by means of potentiodynamic polarisation tests and polarisation resistance measurements.

TL;DR: In this paper, eight diazoles were investigated as corrosion inhibitors of mild steel in 1 M hydrochloric acid using gravimetric and polarization techniques, and it was found that the inhibition efficiency increased with the increase of organic substrate concentration, while the adsorption followed the Frumkin isotherm.

TL;DR: In this paper, a chemical conversion treatment and an electroless nickel plating were applied to AZ91D alloy to improve its corrosion resistance, which was verified by immersion test and potentiodynamic polarization test in 3.5 wt.% NaCl solution.

TL;DR: In this article, the corrosion behavior of aluminium in 2 M HCl solution in the absence and presence of four compounds of antibacterial drug was investigated using hydrogen evolution, weight loss, and potentiostatic polarization techniques.

TL;DR: In this paper, an investigation was carried out into the galvanic corrosion of magnesium alloy AZ91D in contact with zinc, aluminium alloy A380 and 4150 steel, and specially designed test panels were used to measure galvanic currents under salt spray conditions.

TL;DR: In this paper, X-ray diffraction analysis of nanocrystalline nickel was performed to determine the grain size and microstrain of Ni deposits by electrodeposition using Watt's bath.

TL;DR: AISI 316 austenitic stainless steel has been plasma nitrided using the active screen plasminarizing (ASPN) technique as mentioned in this paper, and the results showed that the untreated 316 stainless steel suffered severe localised pitting and crevice corrosion.

TL;DR: In this paper, the corrosion behavior of TiN coated type 316 stainless steel (SS) was investigated in simulated proton exchange membrane fuel cell environments, i.e. 0.01 M HCl + 0.1 M Na2SO4 solutions bubbled with pure oxygen and hydrogen gases, respectively, by using electrochemical measurement techniques.

TL;DR: In this article, a first step in modelling the behavior of iron corrosion is proposed, based on the description of the cathodic reactions associated with iron oxidation: reduction of a part of the rust layer (lepidocrocite) and reduction of dissolved oxygen on the rust layers.

TL;DR: In this paper, the surface morphology of corroded nanocrystalline zinc was characterized by discrete etch pits, however, uniform corrosion was obtained after potentiodynamic polarization of EG steel.

TL;DR: In this article, the effect of heat treatment on the corrosion behavior of Ti-13Nb-13Zr alloy in Ringer's solution was investigated using optical microscope, electron probe microanalysis and XRD techniques.

TL;DR: In this article, the effect of copper corrosion by benzotriazole (BTA), 2-mercapto benzoxazoles (MBO) and 2-mdr-benimidazole(MBI) in 0.5 mol L −1 HCl was investigated by weight-loss measurements, potentiodynamic polarization curves and electrochemical impedance spectroscopy.

TL;DR: In this paper, the authors used weight-loss and potentiostatic polarization methods to study the inhibition of aluminum corrosion by sulfonic acid, sodium alkyl sulfate (SAS), and sodium cumene sulfonate (SCS).

TL;DR: In this paper, the effect of different surface passivative processes on the in vitro corrosion resistance of 316L stainless steel wire was studied and the results showed that all of these surface treatments did not improve the corrosion resistance satisfactorily except amorphous oxidation, which was attributed to the removal of plastically deformed native air-formed oxide layer and the replacement of a newly grown, more uniform and compact one composed of nano-scale oxide particles with higher oxygen and chromium concentrations.

TL;DR: In this paper, high temperature corrosion tests were performed on low-alloyferritic steel and austenitic stainless steel, five high velocityoxy -fuel (HVOF) coatings, a laser cladding, and a diffusion chromized steel.

TL;DR: In this article, the composition, structure and porosity of the rust were analyzed by different methods: OM, SEM, EDS, EPMA, XRD, μXRD, SAXS, BET and mercury porosimetry.

TL;DR: In this article, the corrosion behavior of galvanized steel under wet-dry cyclic conditions with various drying periods was studied, where the polarization resistance, Rp, and solution resistance, Rs, were continuously monitored.

TL;DR: In this article, the effect of some mercapto-triazole derivatives synthesized in the laboratory containing different hetero atoms and substituents in the organic structures on the corrosion and hydrogen permeation of mild steel was investigated by weight loss and various electrochemical techniques.

TL;DR: In this paper, the corrosion of aluminum alloy 2024-T3 (AA2024 T3) under thin electrolyte layers was studied in 30 wt% sodium chloride solutions by cathodic polarization and electrochemical impedance spectroscopy (EIS) method.

TL;DR: In this paper, the oxidation behavior of selected ferritic steels in a simulated steam environment at temperatures between 550 and 650 °C was studied and the anomalous temperature dependence is related to differences in chromium distribution in the inner part of the oxide scale.

TL;DR: The possibilities offered by the EIS technique for studying the progress of corrosion in several types of galvanized coatings were investigated in this article, where a tendency was seen towards an electrochemical overestimation of the corrosion values of essentially pure zinc and Zn-5%Al (Galfan) coatings compared with the gravimetric reference values.

TL;DR: In this paper, five chromium steels with different surface finishes (electropolished, polished, ground, sandblasted) were oxidised for 1, 10 or 100 h in three different atmospheres: H 2 −2.5%H 2 O, N 2 −20% H 2 -0.49% h 2 O and N 2 -20.5 % O 2 at 600 °C.

TL;DR: The influence of ambient concentrations of carbon dioxide on the atmospheric corrosion of magnesium has been studied by atomic force microscopy (AFM) and scanning electron microscopy(SEM) as discussed by the authors.

TL;DR: In situ electrochemical scanning tunneling microscopy (ECSTM) investigations of the anodic Cu(I)/Cu(II) duplex passive layers grown on Cu(1 1 1) and Cu(0 0 1) in 0.1 M NaOH are reported.

TL;DR: In this article, the authors used several experimental techniques to study the corrosion products formed on steel rebars embedded in concrete during 65 years and found that rust was composed of two layers: an inner one composed mainly of non-stoichiometric magnetite and probably Ca and Al substituted magnetite firmly adhered to the substrate, and an outer one composed of α- and γ-iron oxyhydroxides, final steel corrosion products.

TL;DR: In this article, X-ray photoelectron spectroscopy was performed on Fe20Cr and Fe15Cr in 0.5 M H2SO4 and showed that the outer part of the transpassive layer is formed predominantly by Fe(III) species whereas the inner part still contains a strong enrichment of Cr2O3.

TL;DR: In this paper, 2.5-Bis(4-dimethylaminophenyl)-1,3,4-oxadiazole (DAPO) and 2,5-bis(4]-aminoacetyl-1, 3,4,4thiadiazoles(DAPT) have been synthesized and their inhibiting action on the corrosion of mild steel in 1 M HCl and 0.5 M H 2 SO 4 at 30 °C has been investigated by various corrosion monitoring techniques.

TL;DR: In this article, a stochastic model is presented for easily and accurately determining the proportion of neutral-twins, which do not disrupt connectivity in the network of random boundaries based on the relative frequency of twin-variant boundaries (i.e. Σ9s and Σ27s) in the microstructure.