Standard

NS-EN 12634:1998

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Abstract

This European Standard specifies a method for determination of acid number by potentiometric titration, of lubricating oils and additives soluble in mixtures of propan-2-ol, dimethylsulfoxide and toluene. It is applicable in the range 0,1 mg KOH/g to 250 mg KOH/g, and to unused and used lubricating oils and additives. In the case of engine oils, used engine oils and oils with a high polymer content, e.g. viscosity index improvers, precision will be poor as the electrode performance will be impaired, and the application of this method is not recommended. Precision data are only valid for industrial oils and related products. NOTE : No direct conclusions can be drawn from the content of the acidic constituents on the suitability of lubricants for specific applications, and it is not possible to rate comparatively the quality of lubricants and additives on the basis of the quantity of acidic components. WARNING. The use of this standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

Document information

  • Standard from SN
  • Published:
  • Edition: 1
  • Version: 1
  • Document type: NAT
  • ICS 75.100
  • National Committee SN/K 576

Product Relations

  • Adopted from: EN 12634:1998 , 0