Showing papers in "Corrosion Science in 1998"

TL;DR: In this paper, the corrosion of die cast AZ91D was studied and related to its microstructure, and it was found that the casting method can influence the corrosion performance by its influence on the alloy microstructures, which is attributed to a combination of higher volume fraction of the beta phase, a more continuous beta phase distribution around finer alpha grains, and lower porosity in the skin layer than in the interior of the die casting.

TL;DR: In this article, the corrosion behavior of dual phase alloys was studied in 1 N NaCl at pH 11 by measuring electrochemical polarization curves, electrochemical AC impedance spectroscopy (EIS) and simultaneously measuring the hydrogen evolution rate and the magnesium dissolution rate.

TL;DR: In this paper, a comprehensive review of the literature concerning the application of lanthanide compounds as corrosion inhibitors of aluminium alloys in aqueous solution is presented, and the mechanism involved in the cathodic inhibition process by lanthanides is also dealt with.

TL;DR: In this paper, the corrosion behavior of 6056 T6 aluminium alloy was investigated in 1-M NaCl solution and it was found that pits first developed within the grains and grew up through microscopic crystallographic tunnels.

TL;DR: In this article, a phenomenological model to explain the formation of bronze patinas is developed on the basis of a decuprification phenomenon, which is modelled by a three-layer structure characterized by the presence of cuprous oxide and by an increase in the chloride content at the internal layer/alloy interface related with selective dissolution of copper.

TL;DR: In this article, the crystal structure of the Fe(II)-Fe(III) hydroxychloride known as Green Rust one (GR) was investigated by X-ray diffraction and confirmed to be analogous with that of iowaite.

TL;DR: In this paper, it is shown that the electrochemical reactions taking place at the substrate/electrolyte and substrate/polymer interfaces are responsible for delamination of model coatings on steel.

TL;DR: In this paper, a double-layer structure of the inner layer consists of a chromium-rich spinel and is covered by an outer layer of magnetite or iron-nickel spinel.

TL;DR: In this article, a simple, non-pigmented polymer was used for the verification of the model presented in Part 1 and several key experiments were conducted to verify the model.

TL;DR: A new class of corrosion inhibitors, namely, 3,5-bis(n-pyridyl)-4-amino-1,2,4-triazoles (n-PAT) has been synthesized and its inhibiting action on the corrosion of mild steel in 1 M HCl has been investigated by various corrosion monitoring techniques such as corrosion weight loss tests and electrochemical impedance spectroscopy as mentioned in this paper.

TL;DR: In this paper, the corrosion inhibition by Schiff base compounds derived from diamines and o -hydroxy, o -methoxy aromatic aldehydes was investigated by weight loss, electrochemical measurements and surface analysis.

TL;DR: In this paper, the formation of surface films may cause long-term problems by reducing the activity of the metal surfaces or by causing the clogging of pores, and it was found that anaerobic corrosion of iron leads to the initial formation of ferrous hydroxide at the beginning of the reaction.

TL;DR: In this paper, the effects of surface finish, nitric acid passivation and ageing in air on corrosion resistance of 316LVM stainless steel in 0.5% H 2 SO 4 have been investigated by EIS, potentiodynamic polarization measurements and XPS.

TL;DR: In this article, a comprehensive study of the chemical composition, structure and electrochemical behaviour of oxide films developed on 316L stainless steel in a primary medium (1000 ppm B, 2ppm Li, 37ppm H2 at 350 °C).

TL;DR: In this paper, it is shown that oxygen reduction plays a central role in the delamination process and the reaction rate of the oxygen reduction for the simple non-pigmented polymer under investigation is determined by the ohmic potential drop between the defect and the delamination frontier.

TL;DR: In this paper, cyclic polarisation tests were performed in a saline solution at 37 °C, on porous pure titanium compacts with varying porosities and pore sizes, solid titanium and 316L stainless steel.

TL;DR: In this paper, the authors experimentally confirm the participation of diffusion in the response of reinforced concrete specimens to the different electrical signals applied, and make an examination of which equivalent circuit might be most suitable for modelling the system.

TL;DR: In this paper, the authors evaluated the inhibition action of natural honey on the corrosion of copper in a 0.5 M sodium chloride solution by weight loss measurements and cathodic polarization technique and found that a good inhibition efficiency was observed which increases with an increase in inhibitor concentration.

TL;DR: In this article, a relationship between the corrosion behavior of the electrogalvanized zinc, zinc-iron, and zinc-nickel coatings and their microstructure is analyzed by Tafel extrapolation method from the potentiodynamic polarization curves.

TL;DR: In this paper, the susceptibility to stress corrosion cracking (SCC) of the Al-Zn-Mg-Cu French 7010 alloy of different temper has been investigated by Slow Strain Rate Testing.

TL;DR: In this paper, the transition potential between activation and diffusion control of the dissolution has been mapped as functions of limiting current density and temperature, and the results interpreted using a simple model of dissolution kinetics within the pit.

TL;DR: In this article, the corrosion inhibition on metallic iron surfaces by organic molecules has been investigated both experimentally and theoretically, and the inhibition efficiency of thiophenol, phenol and aniline have been compared through gravimetric and electrochemical experiments.

TL;DR: In this article, the pitting is initiated preferentially during the dry cycle after a critical chloride concentration is reached, followed by a shift of the corrosion potential to about −400 mV (SSE) as growth commences.

TL;DR: In this paper, an analytical transmission electron microscopy (TEM) analysis of cross-sectional foils revealed grain refined surface layers (GRSLs), approximately 1 mm thick on the rolled sheet, consisting of subgrains in the size range 20 to 200 nm.

TL;DR: The electrochemical behavior of AISI 316 stainless steel in natural seawater collected from the Canary archipelago was investigated in this article, where a comparative study on a large number of samples immersed during three weeks in this environment with and without sulfate-reducing bacteria (SRB) was made Open circuit potential measurements, cyclic polarization, Scanning Electron Microscopy (SEM) and Electrochemical Impedance Spectroscopy (EIS) were used.

TL;DR: In this paper, the behavior of non metallic inclusions was investigated on undeformed and plastically deformed ferritic steels, and it was shown that manganese sulphides containing iron, silicon-rich particles and titanium nitrides are preferential trapping sites for hydrogen.

TL;DR: In this paper, a multi-piece wire beam electrode has been developed to enable the measurement of electrochemical parameters from local areas over a working electrode surface and thus it can be used to study heterogeneous electrochemical processes.

TL;DR: In this article, the FFC susceptibility of cold rolled and painted aluminium substrates in the AA1000, 3000 and 8000 series, in various tempers and subjected to various pretreatments, were investigated by using an accelerated laboratory test.

TL;DR: In this article, the corrosion behavior of nanostructured Cu90Ni10 alloys in neutral solution containing different chloride concentrations has been investigated and the passivity of the alloy and the influence of the crystal structure have been examined.

TL;DR: In this article, the anodic behavior of pure Mg, binary Mg-Al alloys and intermetallic Mg17Al12 was studied in a solution containing 3 M KOH+ 0.6 M KF+0.21 M Na3PO4, with and without addition of 0.4 M and 1.1 M of aluminate.