Showing papers in "Corrosion Science in 2002"

TL;DR: In this article, 3,5-bis(4-methylthiophenyl)-4H-1,2,4-triazole (4-MTHT) has been studied for corrosion inhibition of mild steel in 1 M HCl and 0.5 M sulphuric acid (H 2 SO 4 ).

TL;DR: In this paper, the status of knowledge for the solubilities of oxides in fused Na 2 SO 4 is reviewed, and the effects of various influences on a fluxing mechanism are discussed.

TL;DR: In this article, the effect of rhodanine azosulpha drugs on the corrosion behavior of 304 stainless steel in 1.0 M hydrochloric acid solution as corrosive medium has been investigated using weight loss and potentiostatic polarization techniques.

TL;DR: In this paper, the adsorption and corrosion inhibitive properties of three different organic molecules: 2-naphthalenesulfonic acid, 2,7-Naphthalenedisulfonic acids, and 2naphthol-3,6-disulfonic acyclic acid are investigated on Armco-iron electrode cathodically polarized, in 0.5 mol dm−3 H2SO4 solution.

TL;DR: The role of nitrogen in the mechanisms of localized corrosion resistance and repassivation was electrochemically investigated using a nitrogen-bearing austenitic stainless (SUS316L) steel in 0.1 and 0.5 M Na2SO4 solutions and a 3.5% NaCl solution.

TL;DR: In this paper, the authors used a semi-quantitative model based on concentration gradients and active/passive transitions to explain pit growth, morphology and cover formation with the help of a semiquantitative approach.

TL;DR: In this article, the corrosion rates of the Fe50−xCr16Mo16C18Bx glassy alloys with a diameter of 1.2 mm were in the range of 10−3−10−2 mm−1 in 1, 6 and 12 N HCl solutions at 298 K.

TL;DR: In this paper, the efficiency of 2,5-bis(n-methoxyphenyl)-1,3,4-oxadiazoles (n-MOX) as corrosion inhibitors for mild steel in 1 M HCl and 0.5 M H2SO4 have been determined by weight loss measurements and electrochemical studies.

TL;DR: In this paper, the microstructure and the corrosion behavior of high pressure die-cast and semi-solid cast AZ91D magnesium alloys have been investigated, and it has been shown that the semi solid cast alloy possesses a corrosion rate at least 35% below that of the die cast alloy, which can be explained with considering the differences between the composition of the primary α phase and the volume fraction of the β phase.

TL;DR: The corrosion behavior of reinforcing steel bars (rebars) in four different concrete mix designs commonly used at coastal cities in Argentina is studied in this article, where two exposure conditions were investigated: seashore environment and partially immersed in a saline solution.

TL;DR: Pitting corrosion studies were carried out on cold worked (5, 10, 15, 20, 30, and 40%) nitrogen-bearing (0.05, 0.1% and 0.22% N) type 316L stainless steels in neutral chloride medium as mentioned in this paper.

TL;DR: The use of Tryptophan (Trp) as a copper corrosion inhibitor was tested in 0.5 M aerated sulfuric acid (H2SO4) temperature range as mentioned in this paper.

TL;DR: In this article, a general reaction scheme has been deduced which describes the evolution of the copper patina, including altogether eight compounds, formed upon exposure to outdoor atmospheric environments, using a recently developed method for quantitative X-ray powder diffraction analysis of up to 8 year old patina still adhering to the copper substrate.

TL;DR: In this article, the effect of the buffer capacity of test solution on the corrosion rate of cast pure (>99.95 mass%) and high-purity (> 99.9999 mass%) magnesium, and AZ31 and AZ91E has been studied.

TL;DR: In this article, the aging performance of Ti/70%IrO 2 −30%Ta 2 O 5 (at mole fraction) anodes prepared at 450 °C over the whole electrolysis time in H 2 SO 4 solution have been investigated.

TL;DR: In this paper, a 10,000 h test of an austenitic stainless steel (UNS S30400) was conducted in hydrogenated, ammoniated water at 260 °C.

TL;DR: In this article, the corrosion and corrosion inhibition of mild steel in CO2 saturated solutions were studied under turbulent flow conditions at different pH levels, and the corrosion rate always increased with time, behaviour also associated with the presence of Fe3C surface film.

TL;DR: In this article, a foil technique was employed to view the development of two-dimensional pits in 304 SS at different temperatures and chloride concentrations, or in the presence of an inhibitor (sulphate).

TL;DR: In this paper, the authors investigated the relationship between surfactant aggregation and mild steel corrosion inhibition in an acidic medium using cetyl pyridinium chloride and cety trimethyl ammonium bromide.

TL;DR: In this article, the mechanism of attack by sodium chloride particles on zinc has been described, and the chemistry of the compounds formed as a result of the corrosion mechanism have been determined using spectrographic techniques.

TL;DR: Based on the similarity between the electrical breakdown of insulators and the pitting breakdown, the mechanism of the breakdown of passive film of transition metals in a chloride solution is described in this article.

TL;DR: In this article, an imidazoline based inhibitor behavior in carbon dioxide environment has been studied in large pipelines under different slug flow conditions by electrochemical impedance method, and it is found that, for each of the slug flow condition, charge transfer resistance, R t, and Warburg impedance coefficient, σ, increase with increasing exposure time.

TL;DR: In this paper, the formation of scale structures and the effect of corrosion-resistant alloying elements can be explained according to the stability tendencies of metals, chlorides, and oxides in the M-Cl-O equilibrium diagrams.

TL;DR: In this paper, the dissolution behavior of the oxides showed almost the same tendency as that shown by the dissolution behaviour of oxides in molten Na2SO4 in literature, and the scale analysis suggested that the effect of molybdenum could not be explained completely by only the mechanism derived from the result of the solubility measurement.

TL;DR: In this article, it was shown that the location of cerium precipitates depend on the distribution of the cathodic areas that could lead either to a continuous layer covering the surface or to precipitates inside the mechanical failures.

TL;DR: In this paper, the effect of azoles such as benzotriazole (BTA), mercaptobenzothiazole (MBT), benzimidazole(BIMD), benzobenzimidaxole (BIMD) and IMD on the growth of oxide film on copper in 0.1 M NaOH was studied.

TL;DR: In this article, the authors investigated the oxidation of type 310 stainless steel at 600 °C in the presence of O 2 and O 2 +10% and 40% H 2 O. The effect of gas velocity was studied.

TL;DR: In this paper, the formation kinetics of polyamino 1,2,4-triazole (pATA) films were investigated using cyclic voltammetry, chronoamperommetry and quartz crystal microbalance.

TL;DR: In this paper, the electrochemical behavior of copper, nickel and copper/nickel (Cu55/Ni45) alloy in 0.50 M H2SO4 in the absence and presence of propargyl alcohol was studied.

TL;DR: In this paper, a study of hydrogen embrittlement of commercial purity titanium was conducted in the presence of gaseous hydrogen at elevated temperatures and the results showed that the higher iron content of the grade 3 titanium was more susceptible to hydride formation.