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Acid Number
Definition:
Acid Number is the amount of acid present. Values higher than that of the new lubricant is an indication of oxidation or contamination.
Standard Test Method Used:
Reporting Measurement:
mg KOH/g (milligrams potassium hydroxide per gram of sample)
Amount of Sample Needed
4g
Test Limitation:
Does not determine type of acid, only amount of acid present. Does not distinguish between strong or weak acids.
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