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Chemically Bonded Phosphate Ceramic coating was investigated in various environments such as inland, beach and salt-fog exposure. After 8-month outdoor testing, the coating was evaluated by visual inspection, coating thickness, adhesion measurement and X-ray diffraction. Long term testing ensued, up to 24 months.
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In this paper, we will present a study that is aimed at understanding the relative rates of reactions between oxidizers and bacteria, iron sulfide, H2S, other oxidizable compounds present in produced waters and the overall impact on metal corrosion.
The aim of this test program is to provide technical data to support the replacement of austenitic flexible pipe carcass, at Campos Basin, by low cost materials with suitable mechanical properties and corrosion resistance when the field conditions turn too aggressive to carcass materials in operation.
Synthesis of materials for immobilization of well-known pH indicators, added to coatings for corrosion sensing: Layered double hydroxides, silica nanocapsules and polymeric microcapsules (chitosan). Characterized by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopies.
Temperature effect on cathodic protection (CP) design current density was examined by electrochemical tests, and a case study of optimized CP design for the FPSO (Floating Production Storage and Offloading) using a computational analysis tool was performed.
It has been shown that when calcium and phosphate, used with an oxidizing agent that the two inhibiting mechanisms, calcium phosphate and azole, compete for the surface. By identifying the surface chemistry, new inhibitors were developed to target surface chemistry of yellow metals.
An alternative method for directly measuring effectiveness of AC-induced corrosion control and mitigation efforts. This method takes the form of traditional coupons imbedded with ultrasound testing (UT) transducers designed to directly measure and track coupon metal loss and related corrosion-induced anomalies.
Simulation shows that navigation algorithms can guide autonomous vehicles to inspect poles or towers for corrosion, or to inspect enclosed spaces. The algorithms use sensor feature extraction, PID control, dynamic window obstacle avoidance, and genetic algorithm solutions to the traveling-salesman problem.
Laboratory exposure testing of carbon steel to water from different regions of the United States, with varying chemistries and chloride content. The results of chemical analyses conducted in the laboratory, including elemental analysis by SEM/EDS and analysis by x-ray diffraction are correlated to water chemistry.
Coastal Lima Peru is an aggressive atmosphere. This reports a field trial of a high-temperature low-sag ACCR (aluminum conductor, composite reinforced) conductor. It contains aluminum and aluminum matrix composite constituents, and uses a greased configuration.
In a previous investigation, AC corrosion rate data from weight loss experiments was compared with the results from a model for AC corrosion developed using a modified Butler-Volmer approach. In the present work, an extension of this is presented to investigate the influence of scale formation on AC corrosion rates.
Two case histories at a thermal in-situ oil sands project elaborate on field parameters by studying the various corrosion phenomena at play. Mitigation recommendations are also be presented.