Symptoms (analysis)
The specific symptom of the “chemical degradation of oil” criticality is related to the presence of the following diagnostic indicators with typical values that do not conform with those recommended by IEC 60422:
Water in oil (IEC 60814)
Appearance (ISO 2049)
Colour (ISO 2049)
Total acidity – TAN (IEC 62021-1 or IEC 62021-2)
Dielectric dissipation factor (IEC 60247)
Particles (IEC 60970)
There are other co-factors useful for completing the diagnostic picture:
Interfacial tension (ASTM D971, EN 14210)
Additives:Passivators (BTA, Irgamet 39, Irgament 30); oxidation inhibitors (DBPC, DBP)
DBDS (IEC 62697-1)
Dissolved metals (ASTM D 7151)
Oxidation stability (IEC 61125)
Sediments and sludge (Annex C of IEC 60422 Ed.4-2013
Oil fingerprint
Copper deposition tendency test
Info
In natural ester oils, additives can be up to 5% (0.3% in mineral oils); therefore their degradation by-products are decisive indicators.
Through oil analysis it is possible to assess the state of chemical degradation
SM-TAN Kit (Total Acidity Number): field analysis of the acidity of oil
The kit makes it possible to obtain the result in very few minutes, with high repeatability and reproducibility; it can also be used on particularly dark specimens and is suitable for the analysis of liquid matrices.
The test can be performed by non-specialised personnel thanks to the illustrated support manual, tutorial videos and Sea Marconi’s support service (read more).
