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Mold and mildew growth within Navy ships is a significant issue across the fleet. To investigate this issue the Environmental Security Technology Certification Program (ESTCP) and the Strategic EnvironmentalResearch and Development Program (SERDP) funded an investigation into the prevalence of mold in the fleet, with the end goal of developing solutions to remediate and prevent future mold growth. Thusfar, mold and coating data was collected from 26 ships across 6 geographic locations. These mold samples have been analyzed to determine the most common species and highlight those that are toxigenic.
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This case has been selected because we see this industry doesn’t get much attention and there are several cases came to our attention in the recent past. The corrosion protection of caisson was designed using painting only and no CP system was considered. The location is adjacent to the sea and water table is about 5-6 meters.
Asset owners spend significant monies each year on the construction of new and the maintenance of existing infrastructure. More than ever, these funds can be difficult to procure and budget. The owners include, both municipal and industrial entities and funds are limited in most cases, therefore, asset service life is very important to all parties.
In oil and gas industries the material surface of pipelines, tools, and equipment is exposed to many harsh operational conditions- one of which is the repetitive impingement of contaminated solid particles when encountering a mixture of gas and sand or liquid solids-laden slurries. In addition to maintenance and material expenses, mass loss of materials due to erosion results in unstable production rates. Hence, predicting the erosion provides the ability to optimize the design and qualify it for operation in an erosive environment for the required operational life.
In the mid-1990s, the US Navy’s technical community, led by Naval Sea Systems Command (NAVSEA), recognized existing coatings used to protect the inside of ships’ tanks were failing on average 5-8 years after application. The high cost to blast and recoat over 11,000 tanks every 5-8 years, not counting submarines and aircraft carriers, was prohibitive. To address this issue, the Navy conducted a study to analyze the problem and decided to replace these legacy coatings with high solid epoxy coatings.1
Canada's oil sands are the third largest deposit of crude oil in the world, and consist of a mixture of sand, water, and bitumen. Due to an aggressive operating environment that includes abrasive sands and corrosive chemicals, oil sands equipment and process piping often experience severe wear and erosion-corrosion, which can lead to the risk of equipment failures, plant downtime or, even worse, environmental leaks [1]. For more than half a century, oil sands producers have collaborated with materials suppliers, equipment fabricators, and technology providers to develop wear technologies to reduce downtime and improve operational reliability.
While performing cathodic protection surveys, carrier pipe and casing potential readings are typically recorded at the same test station location near the end of a casing. Comparing these potentials should reveal a difference between the cathodically protected pipe versus an unprotected and electrically isolated casing. The difference in potentials is one of available tests to determine whether a casing may be electrically shorted to the carrier pipe. The pipe-to-electrolyte and casing-to-electrolyte potential comparison is usually the initial “screening” method.
Conference Proceedings for papers presented at the CORROSION 2021 Virtual conference & Expo. Included in the download is a table of contents of the papers.
Various aspects of the mechanism of C02 corrosion are reviewed, together with a discussion about the validity of a number of simplifications which can be used with models for predicting the corrosion rate. A "worst case" rate can often be predicted. To this end a number of parameters has been identified, the
influence of which has to be accounted for. The effects of protective corrosion product layers and of dissolved corrosion product on pH needs to be included in the prediction. More quantitative information about the effect of flowpattern and flowrate is needed. For wet gas pipelines, the prediction of the effect of injection of glycol as a measure against corrosion is of special interest. Predictive models consisting of a system of rules and equations can be conveniently developed in computer spreadsheets.