Bl This standard establishes the method to determine the sulfated residue obtained in new lubricating oils and on concentrated lubricating oil additives. It can also be used as an indication of the concentration of metals contained in additives in new oils. B-2 Sulfur, bromine, and chlorine, if present, do not interfere; On the other hand, the presence of phosphorus, in proportions of no less than 0.1%, tends to interfere by remaining partially in the residue. B-3 This method is not applicable to new or used oils that contain lead, since it partially volatilizes; In this case, the sulfated residue must be determined in accordance with the method indicated in the IRAM 6570 standard.
IRAM 6571-1955 history
1955IRAM 6571-1955 Petroleum products. Determination method of residual sulfur in new lubricating oil