1,775,124 research outputs found
Testing of generic volatile inhibitor compounds in different top-of-the-line corrosion laboratory test methods
No full textTop-of-the-Line (TOL) corrosion is a significant problem associated with the transportation of wet natural gas in the oil and gas industry. It has the potential to cost the industry millions of dollars every year through the replacement of affected pipelines and lost or deferred production. There is increasing research attention given to the development of continuous chemical treatment inhibitors to mitigate TOL corrosion. Different techniques have been developed; however, volatile corrosion inhibitors (VCIs) hold the most promise. It is anticipated that VCIs may be injected continuously into the produced fluids at the bottom of the line and due to their volatility disperse through the gas phase and ultimately co-condense along with water, organic acids and corrosive gases on the internal pipe wall, thus providing corrosion inhibition. Three generic volatile inhibitor compounds, a primary, a secondary and a tertiary amine have been tested in two different TOL and one bottom of the line (BOL) laboratory corrosion test; a Cooled Finger Probe and a Horizontal Cooled Tube to verify Top-of-the-Line inhibition properties and linear polarization resistance (LPR) measurements using a rotating cylinder electrode (RCE) setup to test their BOL inhibition properties
Oral History Interview with Karen Nace
No full textIn this interview, local historian Karen Nace discusses the community of Thorp Spring and the history of AddRan University in the area. Nace also discusses the racial history of the area and the Black families that lived there after the Civil War. She discusses Charley Thorp, who worked on the early AddRan campus
Inhibition of CO2 Corrosion of 1030 Carbon Steel Beneath Sand-deposits
No full textThe performance of three corrosion inhibitors was investigated at 1030 carbon steel surfaces in the presence and absence of a sand deposit. Potentiodynamic measurements showed that the inhibition efficiency to mitigate corrosion reactions decreases in the presence of sand deposit. In contrary, the inhibitor performance was found to increase with longer exposure time of the steel to the corrosive media, at sand deposited surfaces. The differences between the steels corroded with and without sand deposit in the presence of an inhibitor were confirmed using both potentiostatic polarisation technique and scanning electron microscopy. The inhibition activity of the studied compounds in mitigating under-deposit corrosion of carbon steel has been discussed
The Development of an Online Course in Corrosion Engineering – A Critical Aspect in any Corrosion Management System
No full textThrough its ongoing partnership with Woodside Energy Ltd, Chevron Energy Technology Company and Chevron Australia Pty Ltd, Curtin University is currently developing online corrosion engineering courses for graduate students, with the aim of assisting them to become qualified corrosion engineers. The first course was offered for the first time in first semester 2011. It is an initiative that will enable Curtin University to respond to the growing demand by industry for high quality graduates with a broad understanding of corrosion issues, particularly those relevant to the oil and gas industry. Further investment into corrosion education will also provide industry with practical solutions applying corrosion management and avoiding costly corrosion damage. As the program is industry driven, the learning outcome is directly relevant to the energy and resources industry. This course is offered in a fully online format to provide flexible learning opportunities for students who may already be in the workforce and do not have the opportunity to attend a formal university based corrosion engineering classes. The Curtin University Corrosion Engineering graduate course is unique to the Australasian region and offers an opportunity to study from the home or employment location. This paper discusses our experiences and lessons learned from the preparation and online delivery of the first unit of the course. The online learning environment will be demonstrated and students currently enrolled in the course will be invited to share their thoughts with the audience
“Donde hay una necesidad, nace un derecho”
Full text linkEl artículo analiza la frase “Donde hay una necesidad, nace un derecho” atribuida a Eva Perón y devenida lema, signo y seña de la escena pública argentina. Se examinan algunos embates recientes a esta frase provenientes de los argumentos libertarianos. Se intenta destacar lo que estos argumentos ocultan, proponiendo un análisis del concepto de “necesidad”, como algo diverso al deseo, y respecto de la ideología meritocrática, intentando mostrar y desmontar los supuestos que la vinculan con el darwinismo social de fines del siglo XIX, como así también algunas dimensiones implicadas en la idea de “recursos escasos”. Se trata de un análisis que intenta reflexionar sobre las múltiples dimensiones involucradas en algunas frases que usamos casi de manera automática.Artículo breve en el marco de una serie de trabajos auspiciados por el Programa “Escolarización. Perspectivas históricas, pedagógicas y políticas de la educación”.Facultad de Humanidades y Ciencias de la EducaciónInstituto de Investigaciones en Humanidades y Ciencias Sociale
Corrosion and Materials Performance in biomass fired and co-fired power plants
No full textIn Denmark, biomass such as straw or woodchip is utilized increasingly as a fuel for generating energy. When straw is combusted, potassium chloride and potassium sulfate are present in ash products, which condense on superheater components. This gives rise to specific chlorine corrosion problems not previously encountered in coal-fired power plants. The type of corrosion attack can be directly ascribed to the composition of the deposit and the metal surface temperature. In woodchip boilers, a similar corrosion rate and corrosion mechanism has on some occasions been observed. Co-firing of straw (10 and 20% energy basis) with coal has shown corrosion rates lower than those in straw-fired plants. With both 10 and 20% straw, no chlorine corrosion was seen. This paper will describe the results from in situ investigations undertaken in Denmark on high temperature corrosion in biomass fired plants. Results from 100% straw-firing, woodchip and co-firing of straw with coal will be reported. The corrosion mechanisms observed are summarized and the corrosion rates for 18-8 type stainless steels are compared
Crevice corrosion of duplex stainless steels in the presence of natural marine biofilms
Full text linkThe evaluation of crevice corrosion of high alloy stainless steels used in offshore applications is of major importance as it is one of the most deleterious forms of localized corrosion which may result in sudden marine corrosion failure. The resistance of UNS S31803 duplex stainless steel (DSS) to crevice corrosion in natural seawater was evaluated by immersion and electrochemical tests. Artificially creviced specimens were tested before, during and after immersion in natural seawater under stagnant conditions for up to eight weeks allowing indigenous marine microorganisms to adhere to the alloy surface and form a biofilm. The changes in biofilm community structure and the influence of biofilm on the crevice corrosion of DSS specimens in seawater were investigated at two different exposure times (4 and 8 weeks) using a combination of potentiodynamic and potentiostatic measurements, surface inspection and bacterial community profile analysis by 16S rRNA gene PCR-DGGE and DNA sequencing. Results indicate that our selection approach to evaluate crevice corrosion yields highly reproducible results. Crevice corrosion was observed only in electrochemically polarized specimens that had been exposed to natural seawater containing bacteria. The possible mechanisms involved in the biofilm enhanced crevice corrosion are discussed
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