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Technologically advanced, fully-digital ultrasonic wall-thickness measurement systems coupled with Internet of Things (IoT) back-haul data communication schemes, including cellular, are enabling transportable,accurate and cost-effective corrosion-monitoring systems.
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Simulation and modeling of corrosion processes is an area of research that has seen significant growthin recent decades, with technological advancements drastically reducing the time required to solve theequations that underpin real-world physics. Predicting the behavior of a system computationally, whendone accurately, provides great benefit complementing experimental testing to further explain what ishappening within the corrosion process. There have therefore been multiple predictive models producedover the years to achieve this aim. Within the realm of carbon dioxide (CO2) corrosion, Kahyarian et al.
It is well known that the hydrodynamics of fluid flow directly influences the corrosion process, as shownin various experiments utilizing rotating electrodes and flow loops to measure corrosion withinturbulent flow. However, when fluid is flowing through a pipe, there is a phenomenon known as the ‘noslipcondition’ which causes the velocity of the fluid to tend to zero as it reaches the wall. For straightpipe flow, this follows the ‘universal law of the wall’ (Figure 1) which separates flow into 3 domains: fullyturbulent flow, the buffer layer, and the viscous sublayer (also known as the boundary layer) which is thebeing modelled here.
This trial demonstrated that ultrasonic monitoring can be applied to detect changes in real-life corrosion rates in a short time (3 weeks). This short feedback time can be used to give advanced warnings on corrosion issues on bends, T-pieces or other areas.
In Corrosion/2021, the authors introduced a molecular mechanistic model that quantifies and predicts SNAPS corrosion rates. During Corrosion/2022, we presented the mechanistic corrosion prediction framework describing the molecular basis of the model’s reactions, kinetics, and mass transport of ROSC to vessel walls. In this molecular model, sulfidation corrosion is calculated for direct heterolytic reaction of ROSC with solid surfaces.
There are more than 47,000 publicly-owned roadway bridges in Canada.1 Over 25% of these bridges have main structural load bearing components made of structural steel (i.e., truss and steel girder bridges) based on data from the Ministry of Transportation, Ontario – MTO.2 According to Statistics Canada, the condition of approximately 40% of these bridges is rated as either very poor (unfit for sustained service), poor (increasing potential of affecting service), or fair (requires attention).3 It was reported by Koch et al.4 that corrosion is one of the main reasons that lead to structural deficiency of steel components of highway bridges. Especially in marine environments, steel bridges are at risk of high rates of corrosion, particularly beyond 15-20 years in service.5 This observation can be expanded to locations where the use of de-icing salt is common practice such as urban areas in North America. In addition, future climatic changes that are evident (i.e., change in temperature and relative humidity) may potentially affect the rate of corrosion-induced deterioration and affect the resistance of bridges against various load types throughout their life-cycle.
Metal loss due to corrosion is a universal phenomenon in refineries which could in turn cause leakage or explosion if not well monitored. There are several units in a refinery such as crude distillation unit, hydro-processing unit, acid alkylation unit, etc. In each unit, there are hundreds of pressure vessels which have different potential damage mechanisms. Hence, it’s critical to establish an effective and efficient way to monitor thickness changing behavior.
Technologies for on-line monitoring of cooling water systems on a short-term basis (minutes to hours) to provide output to deal with changing conditions in real time. Corrosion rates & changes in heat transfer coefficients with precision and accuracy. Historical Document 1989
Guidelines for preparing for, recovering from, and repassivation after a low pH excursion... Procedures applicable to mild steel and need to be modified for other materials. Historical Document 1992
Use of corrosion coupons in oilfield operation. Oil, water, and gas-handling systems. Corrosivlty of various systems. Effectiveness of mitigation. Suitability of different metals. Corrosion rates. Historical document 1991
Specifying dehumidification for blasting and coating projects has become more of a standard practice on tank projects and is becoming more common inside containments and vessels.