... mitigation through the reduction of cathodic current supply through experimental potentiodynamic scans and finite element method modeling simulations. Both coatings tested indicated significant current density reduction (orders of magnitude) relative to the use of bare cathodic substrates. The sol-gel...

...Zhao Yang, PH. D candicate; Yongxiang Liu; Wenlong Qi; Fuhui Wang; Tao Zhang A multi-factor coupled model for stress corrosion crack growth rate in HP-13Cr stainless steel was developed using direct current pressure drop method. Measurements were conducted to investigate the critical stress...

.... Various empirical and mechanistic models are used to estimate corrosion rates in such pipelines, both during the design phase to establish corrosion allowances and inhibitor availability requirements, and then during operation to help interpret inspection results and guide further operational decisions...

... field, and the electric field generated by direct current interference. The proposed method was validated to be effective for modeling these electric fields. The results indicate that interference shifts the pipeline’s body potential positively or negatively compared to its normal cathode state...

...G. Sundararajan; D. Ballal; A. Anderko; S. Gururaj; T. Bos Experimental foundation has been established for improving corrosion models for stainless steels exposed to neutral aqueous chloride media with low levels of dissolved oxygen (DO). Accurate repassivation potentials were measured for UNS...

... for these observations, the interrelated nature of AC and CP was reproduced here for pipeline steel in soil-simulating environments and the results were analyzed within the context of kinetics and transport-based models. The kinetics model combines the Butler-Volmer reaction kinetics for steel oxidation, oxygen...

...Alberto A. Sagüés; Christopher L. Alexander Most damage prediction models for reinforcing steel in concrete treat the corrosion initiation stage as being nearly independent of the propagation stage elsewhere in the system. A next-generation chloride-induced corrosion interdependent model addresses...

... with the peak value of the ratio of the current density from the fast to slow scans. The CGR data were fitted to a crack tip strain rate-based model to account for both the cyclic as well as static CGR. The model developed was able to successfully predict prior data in the literature generated under various...

...Robert E. Melchers; Robert Jeffrey Previously, it was suggested that in the bi-modal model for corrosion loss as a function of exposure period the instantaneous corrosion rate increases by a factor of about 4 through the transition phase from mode 1 to mode 2. Recent experimental observations (from...

... in both measurement and modeling. When performed in a coordinated and complementary way, measurements and modeling provide insights into the controlling processes of a range of localized corrosion phenomena, including crevice corrosion, pitting, intergranular corrosion, and stress corrosion cracking...

... microbiologically influenced corrosion modeling steel In some seawaters corrosion appears to be less severe, usually associated with rusts that contain identifiable calcareous components ¹ —calcite (calcium carbonate, CaCO₃) and siderite (ferrous carbonate, FeCO₃...

... years post construction. In response to this, a recent study introduced, evaluated, and used an analytical modeling approach that projects timing of such failures, given statistics which characterize the distribution of wire corrosion rate. These efforts all considered that corrosion penetration...

... introduced and evaluated an analytical modeling approach that projects corrosion-induced wire and strand fractures and tendon failures, given statistics that characterize wire corrosion rate. This past modeling effort assumed that tensile stress in tendons was constant with time at 63% of the guaranteed...

...Shouxin Zhang; Zili Li; Chao Yang; Jinxin Gou In this paper, the mechanisms and models of alternating current (AC) corrosion are critically reviewed to provide a systematic understanding for the further development of AC corrosion theory. None of the proposed mechanisms could give a full...

... and evaluated an analytical modeling approach that projects initial occurrence and subsequent progression rate of wire and strand fractures and tendon failures, given statistics that characterize wire corrosion rate. The present study builds upon this model by considering and incorporating, first, fractures...

...Huibin Ke; Christopher D. Taylor The utility of density functional theory (DFT) for modeling in materials science and engineering with a focus on corrosion, is broadly introduced, along with an introduction to the technique, its inputs and outputs, and the risks and benefits. Case studies from...

... ^‡ Corresponding author. E-mail: [email protected] . 25 August 2018 16 March 2019 16 March 2019 © 2019, NACE International 2019 hydrogen assisted stress corrosion cracking hydrogen dependent mechanical properties martensite modeling ultra-high strength steel...

... that quantitatively predicts corrosion rates. The GCPT is a computational engine that predicts pitting corrosion and galvanic corrosion rates between dissimilar materials. Galvanic interactions between dissimilar materials are modeled using a curve-crossing algorithm based on the Theory of Mixed Potentials...

...Srdjan Nešić; Aria Kahyarian; Yoon Seok Choi In the present study, the implementation of a comprehensive mechanistic predictive model for corrosion of mild steel in the oil and gas transmission pipelines is described. The present model simultaneously accounts for all major corrosion scenarios...

...Fraser King; Miroslav Kolář Predicting the long-term corrosion behavior of containers for the disposal of nuclear waste requires making predictions over timescales of up to 1 million years. The development of models to predict container failure times and, more importantly, the development...