Aviation fuel treatment

Where aviation fuel treatment is concerned API and military specifications for quality apply. Where the fuel is heavily contaminated by suspended solids, the use of a micro-prelilter will extend the life of any coalescer cartridge and reduce operating costs. Where it is necessary to treat surfactant laden and discoloured fuels from multi-product pipelines, clay and fuUer s earth filters are used. 

Acids can be present in kerosene aviation turbine fuels because of acid treatment during rehning. These trace acid quantities are undesirable because of the possibility of metal corrosion and impairment of the burning characteristics and other properties of the kerosene. The potential for metals in kerosene is less than it is for aviations fuels, but several of the same tests can be applied (Chapter 6). 

It is clear that the role of surface contamination and its effects upon the resultant joint strength is complex this point has been further highlighted in the work of Olsson-Jacques et al. (1996) who studied the influence of adsorbed aviation fuel on various differently treated surfaces. It is, however, important to note that the degree of degradation is a function of the specific adhesive-primer-treatment-adherend combination used. Therefore, to ensure good adhesion, in the general case, it is recommended that contamination is removed prior to adhesive application. Some methods to achieve this for metallic and polymeric adherends are discussed in the following sections. 

Acidity is a property usually found in lubricating oil (ASTM D-664, ASTM D-974, ASTM D-3339, ASTM D-5770, IP 139, IP 177, IP 431) acidic compounds can also be present in aviation turbine fuels either because of the add treatment during the refining process or because of naturally occurring organic acids. Acidity is an undesirable property because of the pos-... 

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