...INTRODUCTION Potential-dependent threshold (PDT) model with migration effects Model fundamentals The PDT model with migration effects is described in detail elsewhere [ 31 , 33 ], so this section provides only a brief summary. The chloride threshold (Clt_p) in this model ( Equation 1...

... difference across the halide/solution interface, and δφ_s(4,5) is the potential drop across the solution boundary layer. This potential at the limit of repassivation is E_rp. Figure 1 Schematic summary of the phases and interfaces inside the pit considered in the model (M...

...Abstract A high-fidelity mechanistic carbon steel/carbon dioxide (CO₂) corrosion prediction model developed at the University of Leeds has been implemented in the multi-physics (MP) software package COMSOL. The model integrates the bulk solution equilibria, interfacial mass transport...

... Wing , A. , Robbins , W. , Buchheim , G. and Sapienza , F. , 2021, April . Introducing an Innovative Simultaneous Naphthenic Acid, Sulfidation and Mass Transport Corrosion Model for Crudes and Sidestreams . In CORROSION 2021 . 26 Robbins , W. , Srinivasan , S. , Wing...

..., potential, aluminum compounds, and pH fields together with both electrochemical and physicochemical boundary condition types. Experimental and numerical findings presented good correlations. Modeling Droplet Dynamic Electrolytes AA2024 INTRODUCTION As previously reported, ^{1 - 6} the gap...

...Corrosion rate Naphthenic acid Sulfidation Prediction Sulfur Reactive Organic Sulfur Modeling INTRODUCTION Abstract Sulfur has long been recognized to contribute to many forms of corrosion in petroleum refining. One of the most common and least understood forms of corrosion is hot oil...

...INTRODUCTION AC interference analyses are an important part of designing an adequate cathodic protection system on a pipeline when collocations with high voltage powerline(s) occur. Modeling software has been developed to create accurate simulations of what is occurring in the real world to create...

... temperature corrosion by transient formation of FFA is not and forms the focus of this paper. In Corrosion/2021 and Corrosion/2022, the authors introduced a molecular mechanistic model to quantify simultaneous high temperature naphthenic acid and sulfidation corrosion in refinery CDU/VDU operations. Here, we...

... speed, air temperature, cloud coverage, and humidity. Existing mathematical models are available that can predict the maximum HBU achievable under a variety of conditions. Separate from HBU, models and ASTM methods also exist for determining the safe-touch temperature for various heated or hot surfaces...

... corrosion and enhance its lifetime. To this effort we have built a computational model using weather data to predict corrosion in the DSC. We have then investigated electrochemically and computationally the likelihood of corrosion, have evaluated a technology, and coating systems that can be used to extend...

... distance, the system would provide a better current distribution and eliminate over-polarizing nearby pipelines. However, computational models have indicated that maximizing the distance between the ICCP anode sled(s) and surrounding assets is not guaranteed to minimize the risk to both the pipeline...

... loop with mixture velocity and solids concentration of 4.5-7.0 m/s and 19.3-29.1 v/v%, respectively. The oxygen was injected to achieve a dissolved oxygen concentration of 1.0 ppm to 11.7 ppm. The measured corrosion rates were used to validate five existing corrosion rate models. The interaction...

... studied. The use of a dynamic electrolyte provided the unique opportunity to investigate both thick and ultra-thin electrolyte systems. A modeling approach was achieved by solving the Nernst-Planck equations in a 2D dynamic domain. Two kinds of boundary conditions were considered: electrochemical...

... for corrosion prediction models for multiple corrosion damage mechanisms including naphthenic and sulfidic corrosion, ammonium bisulfide corrosion and ammonium chloride corrosion. The by-product of these comprehensive efforts is a real time corrosion software sensor framework built around industry leading...

... (opportunity crudes) has been increasing. ^{3 , 18 , 19} Several industry programs have developed empirical S/TAN corrosion models for based on statistical correlations of large lab databases. ^{11 , 14 , 20 , 21} Most of these engineering models are based on parallel independent acid...

... levels of dissolved O₂ in brine solutions of different concentrations will be described later in this section. Mass flow controllers (Models MC-500SCCM ^† & MC-1SLPM ^† ) from Alicat Co. have been used to precisely control the mass flow rates of N₂ and air...

...On Pipe-to-Soil Potential IR-Free Potential Polarization DC Current Density AC Voltage AC Current Density Soil resistivity Coating Resistance Corrosion Growth Rate (CGR) Model Alignment Confirmation Model simulations are provided with corresponding real-world data...