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51314-4459-Advances in Materials and Corrosion Control in Fossil and Alternative Fuel Combustion and Conversion

Picture for Advances in Materials and Corrosion Control in Fossil and Alternative Fuel Combustion and Conversion
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Product Number: 51314-4459-SG
ISBN: 4459 2014 CP
Author: Georg Andersohn
Publication Date: 2014
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Influence of temperature test duration and water content on dry corrosion of aluminum (EN AW-1050 EN AW-3103 EN AC-46000) in alcohol blended fuelsGeorg Andersohn Matthias OechsnerTechnische Universität DarmstadtInstitute for Materials Technology (IfW) DarmstadtAbstractGasoline is blended with alcohols of biogenious origin such as ethanol or methanol in order to reduce CO2-emissions. The use of these fuels containing alcohol can affect the vehicle reliability due to an incompatibility with the utilized materials of the fuel system.For aluminum alloys in contact with water-free alcohol blended fuels a chemical corrosion at high temperatures is of special interest the so called alkoxide or dry corrosion. Previous investigations reveal that the temperature has to be regarded as the key element controlling the possibility of dry corrosion. A higher amount of dry alcohols like ethanol leads to higher corrosion sensitivity on aluminum and its alloys. In other words higher contents of dry ethanol lower the temperature of dry corrosion.In this study the influence of the temperature on dry corrosion was investigated by immersion tests in pressurized vessels. As a result the so-called threshold temperatures which characterize the maximum allowable temperature without occurrence of dry corrosion were defined for several aluminum materials dependent on the alcohol content. Within the test results the lowest allowable temperature was determined for the cast alloy EN AC-46000 in E85 (85% ethanol content) at 60 °C. The determined temperatures were verified by longer test durations up to 4 weeks. Furthermore the results show a correlation between the size of sample area compared to the liquid volume. The inhibiting effect of water was examined as the dry corrosion could be prevented up to temperatures of 140 °C.Keywords: dry corrosion aluminum alcohol alkoxide temperature water
Influence of temperature test duration and water content on dry corrosion of aluminum (EN AW-1050 EN AW-3103 EN AC-46000) in alcohol blended fuelsGeorg Andersohn Matthias OechsnerTechnische Universität DarmstadtInstitute for Materials Technology (IfW) DarmstadtAbstractGasoline is blended with alcohols of biogenious origin such as ethanol or methanol in order to reduce CO2-emissions. The use of these fuels containing alcohol can affect the vehicle reliability due to an incompatibility with the utilized materials of the fuel system.For aluminum alloys in contact with water-free alcohol blended fuels a chemical corrosion at high temperatures is of special interest the so called alkoxide or dry corrosion. Previous investigations reveal that the temperature has to be regarded as the key element controlling the possibility of dry corrosion. A higher amount of dry alcohols like ethanol leads to higher corrosion sensitivity on aluminum and its alloys. In other words higher contents of dry ethanol lower the temperature of dry corrosion.In this study the influence of the temperature on dry corrosion was investigated by immersion tests in pressurized vessels. As a result the so-called threshold temperatures which characterize the maximum allowable temperature without occurrence of dry corrosion were defined for several aluminum materials dependent on the alcohol content. Within the test results the lowest allowable temperature was determined for the cast alloy EN AC-46000 in E85 (85% ethanol content) at 60 °C. The determined temperatures were verified by longer test durations up to 4 weeks. Furthermore the results show a correlation between the size of sample area compared to the liquid volume. The inhibiting effect of water was examined as the dry corrosion could be prevented up to temperatures of 140 °C.Keywords: dry corrosion aluminum alcohol alkoxide temperature water
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Materials Compatibility Issues in Biofuels – A Review

Product Number: 51317-10039-SG
ISBN: 0039 2017 CP
Author: Narasi Sridhar
Publication Date: 2017
$20.00

The storage and transportation of biofuels continue to be of interest. Material compatibility issues arise. For alcohol fuels, stress corrosion cracking of steels, and swelling and leaching of various polymeric materials. This paper will provide an overview of research that has been conducted in alcohol fuels.

 
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10078 Corrosivity of Anhyddrous Etthanol, Hydrated Ethanol and Fuel E25 (25% Ethanol/75% Gasoline)

Product Number: 51300-10078-SG
ISBN: 10078 2010 CP
Author: A Moreira, Z Panossian, C Santos, G Bragagnolo, M Gandur and E Monteiro
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Picture for Failure Analysis of Reactor Effluent Air Cooler (REAC) in a Hydrocracker Unit
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Failure Analysis of Reactor Effluent Air Cooler (REAC) in a Hydrocracker Unit

Product Number: 51314-3730-SG
ISBN: 3730 2014 CP
Author: Surajit Ghosal
Publication Date: 2014
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A major fire in a Reactor Effluent Air Cooler (REAC) of the Hydrocracker Unit (HCU). Visual inspection was made on the failed portion. Metallurgical investigation, macrostructural and microstructural analysis, Scanning Electron Microscopy, and Energy Dispersive x-ray Spectroscopy was conducted on the failed air cooler.
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