... + [ ω T o u t ( T i n − T o u t ) ] 2 + ( ω A A ) 2 } 0.5 Abstract The mass transfer behavior of electroactive solutes from bulk solution to a metal surface under subcooled boiling and pool boiling conditions was investigated using...

...Abstract It is known that corrosion of pipelines is substantially increased in turbulent flows due to enhanced mass transfer. Mechanistic modeling of mass transfer effect in a turbulent flow presents a major obstacle in corrosion simulation as it would require not only the solution to the Navier...

... coverage, where both anodic and cathodic reaction rates are decreased because of less active surface area being exposed. The inert solid deposits also create a mass transfer barrier for corrosive species which limits the rate of the cathodic reactions. An existing mechanistic electrochemical model...

... mechanisms are derived from the fluid hydrodynamic and mass transfer interactions of the wet gas. The bottom of the pipeline cannot be ignored in the context of TLC. It was positively determined that annual mist flow regimes exacerbate TLC "grooving" or "streaking". internal corrosion predictive modeling...

... in the sulfate reduction at the cathode. The actual cathodic reactions are more complex, but this theory considers only the overall effect. To calculate mass transfer resistance, diffusion coefficients for corrosive chemical species are needed. Literature data on diffusivity are typically for diffusion...

... (Sh = 37) and was independent of Re. For turbulent flow (Re > 300), the mass transfer rate was correlated as The corrosion of metals and alloys in condensed media involves at least three fundamental steps: Transport of the reactant to the metal surface. Electron exchange...

... (ICPM) NDE ILI WG-ICDA excavations inhibitor availability monitoring validation flow regime mass transfer fluid hydrodynamic velocity pressure solids INTRODUCTION Internal and external corrosion conjointly, remain a leading degradation mode and cause of pipeline failures and are perhaps...

..., MIC on AISI 1018 mild steel was reported ³ . Hydrodynamics and nutrient availability are two key factors influencing biofilm growth in MIC investigations. Fluid flow can enhance mass transfer but it may also produce a high shear that inhibits cell attachment and causes even detachment...

...Abstract A mechanistic model for predicting carbon dioxide corrosion in single-phase flow has been extended to predict CO₂ corrosion in multiphase flow. Mass transfer in multiphase flow has a strong influence on corrosion rate. Previous studies used correlations to predict mass transfer...

... engineering angle, mass transfer and flow conditions are very important in SRB biofilm formation and MIC corrosion rates. Experiments were carried out in a 2-liter electrochemical glass cell bioreactor with a carbon steel rotating cylinder coupon. ATCC 7757 strain of Desulfovibrio desulfuricans...

... at 300°C. Mass transfer coefficient calculations indicate that the hydrodynamic conditions under the impinging jet are equivalent to that in a 2.5-inch tube at free flow velocities between 12 to 18 m/s. This facility can be used to verify the corrosion rate of material as a function of temperature...

.... The implications of this model for the corrosion and the cathodic protection of corrosion resistant alloys in seawater, and the possible effect of microbial activity on corrosion rates are discussed. oxygen corrosion flow rotating electrode mass transfer cathodic protection stainless steel INTRODUCTION...

...Yet another semi-empirical correlation was reported by Rosen and Tragardh ¹⁵ , which contains a Schmidt number dependence: (8) D t = 0.155 Sc − 0.112 ( y δ ) 3 μ ρ Both methods for calculating mass transfer rates: globally by using Sherwood number...

... that there are large inhibitor-uncovered areas on the steel surface at higher Froude number. electrochemical impedance spectroscopy (EIS) charge transfer resistance capacitance mass transfer bubble impact turbulence inhibitor film corrosion product film INTRODUCTION One of the main problems encountered...

... of aircraft, automobiles and building structures. crevice corrosion aluminum alloys mass transfer lap joint INTRODUCTION Because of the nature of fuselage lap joints, rain water and/or moisture condensation becomes trapped between the faying surfaces. The occluded solution in the lap joints will result...

...where Sh = hD D f is the Sherwood number, h is the mass transfer coefficient, D is the inside pipe diameter, D_f is the fluid mass diffusion coefficient, R is the radius of the pipe (R=D/2), r is the mean radius of the elbow, and L is the length along the center line...

... and is added into the system through a pressurized regulator and a needle valve. Table 1 The Dimension of the Weld Bead Test Section Test Section 1 mm Weld Bead 2 mm Weld Bead Height (mm) 1 2 Abstract This paper summarizes the results of mass transfer mechanisms under disturbed liquid-gas flow...

... shear stress mass transfer hydrogen ion flux INTRODUCTION Carbon and low alloy steels can corrode severely when in contact with oilfield fluids containing dissolved carbon dioxide gas. The accurate prediction of this corrosion rate is required to estimate component lifetimes and is fundamental...

... processes were treated in a simplified way by assuming independent diffusion of the species and by using well established mass transfer coefficients for the hydrodynamic systems of interest: rotating cylinder and pipe flow. A more detailed approach to the coupled transport of species in a water...

... flow geometries was carried out in terms of hydrodynamics, mass transfer and CO₂ corrosion. The measured mass transfer rates were found to agree well with previously published correlations for the rotating cylinder and straight pipe flow. In case of CO₂ corrosion it was possible...