... was equal to the average AC current in the system. The data generated from weight loss experiments were compared with the results from a model for AC corrosion that was developed using a modified Butler-Volmer approach. The model considers the anodic and cathodic Tafel slopes, diffusion limited oxygen...

...Kyle Addis; Marc Singer; Srdjan Nešić The Institute for Corrosion and Multiphase Technology's (ICMT) FREECORP model was used as a basis for a production tubing corrosion model, here called WELLCORP. The original FREECORP model was modified to account for non-idealities in the gas and liquid phases...

... conditions. Markov models are developed to estimate pitting damage accumulation density distributions as a function of input parameters for pit nucleation and growth rates. The input parameters are selected based upon characterization with experimental or field observations over a sufficiently long period...

... stainless steel 2205 (UNS S32205). A further objective of the paper was to model the effect of aging on the repassivation potential using a model formulation that has already been presented. ^22-24 In our previous work on modeling repassivation potentials, we have shown that the experimental...

... container materials. In the present study, an analytical model has been developed to analyze the corrosion/deposition rates of steels exposed to flowing NaK and Na. In this model, the diffusion of steel constituents in the solid and the transport of the corrosion products in the liquid are coupled...

... 2007 NACE International 2007 carbon dioxide corrosive oil hydrogen sulfide inhibitory oil model oil-wet prediction sour corrosion sweet corrosion water-wet The oil and gas industry relies heavily on the extensive use of carbon and low-alloy steel pipelines. ^1-6...

... elevated levels of nutrient exposure. A more detailed first estimate of the effect of nutrients on the calibration parameters for Phase 0 of the previously proposed marine corrosion loss model is given. ‡ Corresponding author. E-mail: [email protected] . January 2006 November...

... impedance was shown in the EIS plot at an applied potential of 0.2 V where the best anodic protection was achieved. The SEM, roughness, and EIS results were well in accordance with that of mass loss and provided more detailed information on the CE behavior. A model to describe the effect of the applied...

...F.M. Song; D.A. Jones; D.W. Kirk The objective of this work was to develop a model to describe pipeline corrosion within a disc-shaped crevice in the presence of oxygen (O₂). The model results from modification of the pipeline crevice corrosion model (PCCM) previously developed...

... by a multiphase phenomenological model. This was calibrated to data from a variety of sources but with approximately consistent steel exposure area. The maximum pit depth model was shown to be a function of seawater temperature. Herein that model is developed further to deal with uncertainty in maximum pit depth...

...F.M. Song; D.W. Kirk; J. W. Graydon; D. E. Cormack Carbon dioxide (CO₂) corrosion of bare steel under an aerated aqueous boundary layer with imposed cathodic protection (CP) was modeled. The results show that an imposed CP current decreases the corrosion rate because it changes the steel...

...F.M. Song; D.W. Kirk; J.W. Graydon; D.E. Cormack The corrosion of bare steel under an aqueous boundary layer with dissolved carbon dioxide (CO₂) was modeled to investigate the effect of CO₂. The model incorporated the coupled effect of CO₂ diffusion, hydration...

...S. Nes̆ić; K.-L.J. Lee A model of iron carbonate (FeCO₃) film growth is proposed, which is an extension of the recent mechanistic model of carbon dioxide (CO₂) corrosion by Nesic, et al. In the present model, the film growth occurs by precipitation of iron carbonate once...

...S. Nešić; M. Nordsveen; R. Nyborg; A. Stangeland A theoretical carbon dioxide (CO₂) corrosion model was used to conduct numerical experiments, which allowed total insight into the underlying physicochemical processes. The focus was on factors influencing protective iron carbonate film...

...M. Nordsveen; S. Nešić; R. Nyborg; A. Stangeland A mechanistic model of uniform carbon dioxide (CO₂) corrosion is presented that covers the following: electrochemical reactions at the steel surface, diffusion of species between the metal surface and the bulk including diffusion through...

...R.E. Melchers A phenomenological model for general corrosion of mild, low-alloy steel under near-surface, at-sea immersion conditions was proposed earlier. The model was set in a probabilistic framework. The present paper deals with estimation of the various uncertainties associated with corrosion...

...R.E. Melchers A model is proposed for general corrosion of mild and low-alloy steels under fully aerated at-sea immersion conditions as measured by weight loss. Because all factors influencing corrosion have inherent uncertainties, the proposed model is probabilistic, composed of a mean-value...

...F.M. Song; D.W. Kirk; J.W. Graydon; D.E. Cormack Corrosion of a pipe surface in a channel crevice has been modeled assuming oxygen diffusion through a holiday in a permeable coating. The crevice was thin and narrow with a finite length. The crevice solution pH was 9.2 controlled by ferrous...

...F.M. Song; D.W. Kirk; J.W. Graydon; D.E. Cormack A model was developed to investigate the corrosion of a coated pipeline surface in a thin, narrow channel crevice formed between the pipe surface and the coating. Such crevices are often found on natural gas pipelines when the coating is high-density...

...F.M. Song; D.W. Kirk; J.W. Graydon; D.E. Cormack A new model was developed to study the effect of ferrous ion oxidation on the corrosion of active iron. When ferrous hydroxide precipitate is present at the iron surface as the result of corrosion, the solution boundary layer near the iron surface...