IP four: Petroleum Products – Dedication Of Ash (ISO 6245:2017)
This Worldwide Customary specifies a method for the dedication of the ash content grade a petroleum products material of petroleum merchandise, resembling distillate and residual gasoline oils, crude petroleum, lubricating oils, waxes and different petroleum merchandise, during which any ash-forming constituents present are usually thought of to be undesirable impurities or contaminants. Ash can consequence from oil-soluble or water-soluble metallic compounds or from extraneous solids resembling dirt and rust.
The method is applicable to merchandise having ash contents in the vary 0,001 % (m/m) to 0,180 % (m/m), however does not apply to merchandise which include ash-forming additives, together with certain phosphorus gasification compounds. The analysis of unused or used lubricating oils, containing aditives, used engine crankcase oils, lubricating oils containing lead, or sure non-hydrocarbon diesel fuels, needs to be determined using 1SO 39871), which includes a step to supply sulfated ash of higher melting level.
Word 1 – For the needs of this International Normal, the term “% (m/m)” is used to characterize the mass fraction of a cloth.
Be aware 2 – With sure types of samples, the take a look at results might not account quantitatively for all of the steel compounds able to forming an ash. Some unused lubricating oils and distillate gas oils include metallic inorganic additives of grade a petroleum products low molecular mass (e.g.