Simple static oxidation testing

ASTM G 54, Practice for Simple Static Oxidation Testing... 

Metal loss is defined as one half the difference between the original thickness and the remaining thickness after exposure. This thickness extends to just beneath the scale/substrate surface and excludes the thickness of internal attack. This is schematically shown in Fig. 8, as depicted in ASTM G 54, Practice for Simple Static Oxidation Testing. Thus metal loss is defined as ... 

Combined creep and temperature cycling of heating wires (NiCr and NiCrFe-Alloys) Standard Practice for simple static oxidation testing (discontinued 2002)... 

Earlier work described static electricity generation during filtration and the oil auto-oxidation due to spark discharges, respectively [74,75], It was considered that there are overlooked factors like hot spots which produce varnish in gas turbine systems. Thus, spark discharges of static electricity have a strong influence on oil oxidation. A new, simple method to test formation of varnish has been proposed [76]. Typical varnish problems are shown in Figs. 8.9 and 8.10. 

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