GOST 6707-76 PDF
Name in English:
GOST 6707-76
Name in Russian:
ГОСТ 6707-76
Lubricating greases. Method for determination of free alkalies and free organic acids
Full title and description
GOST 6707-76 — "Смазки пластичные. Метод определения свободных щелочей и свободных органических кислот" (Lubricating greases. Method for determination of free alkalies and free organic acids). The standard specifies a chemical titration method for measuring the content of free (unneutralized) alkaline and organic acid components in soap‑thickened lubricating greases.
Abstract
This standard defines a laboratory procedure in which a grease sample is dissolved in an alcohol–benzine mixture and titrated (with an acid or an alkali) in the presence of phenolphthalein to determine amounts of free alkalies and free organic acids. The method is intended for quality control and corrosion‑safety assessment of soap‑thickened greases.
General information
- Status: Active (действует).
- Publication date: Introduced 01 January 1977 (ГОСТ designation year 1976).
- Publisher: Issued under the State system of standards (GOST — state standards originating from the USSR standardization system); maintained in national collections of standards.
- ICS / categories: Oil, gas and related products — Lubricants and industrial oils (classified under categories for lubricants; e.g., 75 / 75.100).
- Edition / version: Original designation GOST 6707-76 (effective 1977); subject to recorded amendments (notably amendments in 1984 and 1986) and later editorial change history.
- Number of pages: 3 pages (concise method standard).
Scope
Applies to plastic (soap‑thickened) lubricating greases. The standard establishes a laboratory analytical method to determine the content of free alkalies and free organic acids that can affect corrosion, stability and performance of greases. It is intended for use in test laboratories, production quality control and normative documentation on greases.
Key topics and requirements
- Sample preparation: removal of surface layers, representative sampling and dissolution of grease in an alcohol–benzine solvent mixture.
- Titration procedure: titration of the prepared solution with a standardized acid or alkali in the presence of phenolphthalein as indicator.
- Calculation and expression: results expressed as content of free alkalies and free organic acids using prescribed titration volumes and titers (standard calculation formulas included in the text).
- Reagents and apparatus references: specifies required reagents (e.g., standardized acid/alkali solutions, phenolphthalein) and laboratory glassware by cross‑reference to related GOSTs.
- Normative references: references a set of related standards that define sampling, solvents, glassware and related test methods used together with this procedure.
Typical use and users
Used by industrial and independent testing laboratories, lubricant manufacturers, quality control departments in production facilities, and standards bodies. Typical applications include routine QC of grease batches, formulation checks, evaluation of corrosivity risks and verification of compliance with product technical specifications.
Related standards
Normative and related references cited in GOST 6707-76 include (examples copied from the standard): ГОСТ 6707-57 (earlier edition), ГОСТ 1770-74, ГОСТ 3118-77, ГОСТ 6709-72, ГОСТ 9147-80, ГОСТ 18300-87, ГОСТ 24104-2001, ГОСТ 24363-80, ГОСТ 25336-82 and ГОСТ 29251-91. The standard is part of the family of test methods for lubricating greases (other grease test GOSTs include methods for mechanical impurities, oil separation, etc.).
Keywords
lubricating grease; plastic greases; soap‑thickened; free alkalies; free organic acids; titration; phenolphthalein; alcohol‑benzine solvent; quality control.
FAQ
Q: What is this standard?
A: GOST 6707-76 is a state standard that defines a chemical titration method for determining free alkali and free organic acid content in soap‑thickened (plastic) lubricating greases.
Q: What does it cover?
A: It covers sample preparation (representative sampling and dissolution), the titration procedure using phenolphthalein as indicator, calculation of results and references to required reagents and apparatus. The method is based on dissolving the grease in an alcohol–benzine mixture and titrating with an acid or alkali.
Q: Who typically uses it?
A: Laboratory technicians, QC personnel at lubricant manufacturers, independent testing labs and organizations responsible for product standards and certification.
Q: Is it current or superseded?
A: As recorded in national standards collections, GOST 6707-76 is shown as active (действует) with recorded amendments (notably in 1984 and 1986) and editorial/registration history; users should check national catalogues for the latest amendment status before formal certification or regulatory use.
Q: Is it part of a series?
A: Yes — it is one of a set of GOST methods for testing lubricating greases and related petroleum products; the standard cross‑references other grease test methods and general normative documents used in lubricant analysis.
Q: What are the key keywords?
A: Lubricating grease; free alkalies; free organic acids; titration; phenolphthalein; soap‑thickened grease; alcohol‑benzine solvent; QC method.