It has been considered that the corrosion of passive metals and alloys is not caused by the active metal-dissolution but the dissolution of a nonporous passive oxide film in aqueous solution. The corrosion current density of iron(1)(2), chromium(3) and their alloys(4) is independent of the potential in all the range of passivity, although depending upon the pH of solution. Vetter(1) explained s...

The influence of the acid extract of peel of Cucurbita maxima (PCM) on the corrosion of mild steel in 1N H2SO4 was investigated by weight loss, polarization and impedance methods and SEM analysis. The inhibition efficiency increases with extract concentration and immersion period. Weight loss and corrosion rates of mild steel decreased as the concentration of inhibitor increased. The results sh...

In CO 2 environments, an increase in the temperature can influence carbon steel flow-induced corrosion (FIC) and erosion-corrosion (EC) degradation processes. Increasing typically results acceleration of electrochemical mechanisms absence protective product layers. Furthermore, presence sand corrosive process fluids could aggravate service conditions. Although iron carbonate (FeCO 3 ) film or/a...

The chemistry behavior of steel electrode in acid solutions has been studied by galvano static polarization technique. The consequences of concentrations of acid and temperature of solution are examined. It was found that greater the citric acid concentration or reducing of temperature of the solution assist the passivation process. The values of icorr decreased with greater concentrations of c...

nano films consisting of an alternating sequence of positively and negatively charged polyelectrolytes have been prepared by means of the electrostatic layer-by-layer (lbl) sequential assembly technique on treated and untreated mild steel wires. inhibitor was encapsulated between cationic and anionic polyelectrolyte nano films. this paper mainly focuses on the effect of these nano-films of poly...

A method for the detection of in situ corrosion monitoring due to atmospheric gasses has been incorporated to measure not only the amount of corrosion on a copper surface but also the rate of corrosion and a study on the bonding of the adsorbent at the gas solid interface. The Quartz Crystal Microbalance (QCM) has recently been used for this corrosion monitoring. Results indicate a difference i...

Recently analyzed long-term Zircaloy autoclave corrosion data were used to develop new Zircaloy corrosion correlations. Calculations were performed to estimate the additional quantity of corrosion that may be experienced by spent Zircaloy-c1ad fuel assemblies from long-term exposure to geologic repository conditions. These estimates indicate that the level of general corrosion is very small and...

The electrochemical corrosion behaviour of mild steel embedded in concrete, and partially immersed in 0.2M H2SO4, was studied in this investigation at ambient temperature by potential monitoring technique. The experimental work was performed with a digital multimeter and a Cu/CuSO4 electrode (CSE) as the reference electrode. Extracts of carica papaya leaves and sodium nitrite (NaNO2) in differe...