ISO 6619:1988 Preview
Petroleum products and lubricants -- Neutralization number -- Potentiometric titration method
This standard was last reviewed and confirmed in 2018. Therefore this version remains current.
Gives a method for the determination of acidic constituents in products soluble or nearly soluble in mixtures of toluene and propan-2-ol. It is applicable for the determination of acids whose dissociation constants in water are greater than 10-9. The method may be used to indicate relative changes that occur in an oil during use under oxidizing conditions regardless of the colour or other properties of the resulting oil. No general relationship between bearing corrosion and acid or base numbers is known.
Buy this standard
A standard is reviewed every 5 years
Revisions / Corrigenda