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BAM Federal Institute for Materials Research and Testing, Berlin
12.08.2020 | Research, Publications

Research report published: Material resistance of components in middle distillate applications

Within this project, a forced test method was developed to determine the resistance of metallic materials to middle distillate fuels and mixtures of middle distillate and paraffinic hydrocarbons both with fatty acid methyl ester (FAME) as a biogenic component. In the method, specimens of the material are immersed in special test media. The compositions of two test media were developed within the project. These test media include the influence of aging of the FAME which is to be expected after a storage of the fuel exceeding 2 years in the field. They cover a range of up to 20 % (v/v) FAME content. The exposure test can be carried out at ambient pressure with little effort.

The suitability of a selection of metallic and polymeric materials relevant to middle distillate supply plants was determined by segregation in the following non-aged fuels: Fuel oil EL low sulphur (B0), fuel oil EL low sulphur with 20 % (V/V) FAME (B20), FAME (B100) and hydrogenated vegetable oil (HVO). The materials were also aged in a 1 year aged B20 and an 8 year aged B10. The temperature during ageing was 50 °C for the metallic materials and 40 °C and 70 °C for the polymer materials. The results of the resistance evaluation were summarised in resistance lists. The evaluations obtained with B20 generally apply to mixtures of fuel oil EL low-sulphur and FAME with a FAME content of up to 20 % (V/V). They are also transferable to mixtures of diesel fuel and FAME with a FAME content of up to 20 %(V/V).

This method with special test media is a cost-effective rapid test for checking resistance of materials to middle distillates having a high FAME content. It can support SMEs manufacturing components for supply systems in further development of existing and new products. It increases the manufacturers' certainty that components will pass approval tests of authorities.

Results of this research project can be incorporated into a harmonized European standard for alternative fuels. This is the prerequisite for component manufacturers to access the European market.

Research Agencies:

OWI Science for Fuels gGmbH
BAM Bundesanstalt für Materialforschung und -prüfung

The DGMK Research Report 780 has been published in German under the title "Entwicklung einer Prüfmethode zur Bewertung der Materialbeständigkeit von Bauteilen in Mitteldestillatanwendungen". It can be ordered directly from the DGMK.

The IGF project (19687 N) of the research association DGMK Deutsche Wissenschaftliche Gesellschaft für Erdöl, Erdgas und Kohle e.V., Überseering 40, 22297 Hamburg was funded via the AiF within the framework of the programme for the funding of Industrial Collective Research (IGF) by the Federal Ministry for Economic Affairs and Energy on the basis of a resolution of the German Bundestag.