acid number


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Related to acid number: Iodine number

acid number

[′as·əd ¦nəm·bər]
(chemistry)
(engineering)
A number derived from a standard test indicating the acid or base composition of lubricating oils; it in no way indicates the corrosive attack of the used oil in service. Also known as corrosion number.
References in periodicals archive ?
Based on criteria such as visual changes, Total Acid Numbers, organic anion and dissolved metal concentrations after aging, the following conclusions were reached regarding the relative stability and compatibility of the different lubricant/C[O.
plating) Total Acid Number (TAN) Changes in TAN values of the samples with chemicals were greater than changes from the controls by one milligram of KOH per gram or less.
Glass transition temperatures were 71-103 and acid numbers were 122-173.
The acid numbers of the triglyceride resins are in the range of 40-100 mg of KOH/g, as shown in Table 1, which is higher than that of typical UPE (normally in the range of 30-50).
In an industrial setting, when a sample has an acid number of a certain value, then the next stage of the synthesis would be undertaken.
Water-based dispersion and emulsion resins typically have high molecular weight and low acid number.
apparatus for measuring the total acid number (tan) and the tbn;
a hydroxyl number of about 20 to about 300 mg KOH/g of polyester, and an acid number of 0 to about 80 mg KOH/g of polyester; (B).
This is because higher acid number means lower conversion, which in turn means lower Mw and viscosity, thus diffusion of oxygen into the film increases, cross-linking takes place faster, reducing the set-to-touch time, etc.
With this system, properties such as moisture content, hydroxyl number, acid number, monomer content, viscosity, general composition, mixing performance and many more properties can be simultaneously measured, with both liquids and highly-filled pastes, according to the company.
B100 Quality Reduced Specification Portfolio for Moisture, Acid Number, Cloud Point, Free glycerin and Total glycerin - Incoming oil for moisture and Free Fatty Acids - B100 process for Mono-glycerides, Di-glycerides and Tri-glycerides, and - Glycerin for moisture and methanol content
Acid number was determined by a standard titrimetric method DIN 53 402.