ISO 4263-4:2006 PDF

Petroleum and related products — Determination of the ageing behaviour of inhibited oils and fluids — TOST test — Part 4: Procedure for industrial gear oils

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Title (English):

ISO 4263-4:2006

Petroleum and related products — Determination of the ageing behaviour of inhibited oils and fluids — TOST test — Part 4: Procedure for industrial gear oils

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 15
Publication date:: January 27, 2006
Edition:: ISO IS 4263 edition 1 version 1
ICS:: 75.100

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Description (English):

ISO 4263:2006 specifies a method for the determination of the ageing behaviour of gear oils of categories CKC, CKD, CKS and CKT as defined in ISO 6743-6. The ageing is accelerated by the presence of air and elevated temperatures, and the degradation of the oil is assessed by the change in kinematic viscosity at 100 °C, the insoluble content (precipitation number), and possibly the acid number increase, the sediment content by filtration, the additives content variation and the infra-red oxidation.

Technical details

Technical committee: ISO/TC 28 - Petroleum and related products, fuels and lubricants from natural or synthetic sources
SKU: ISO 4263-4:2006

Abstract

Overview

ISO 4263-4:2006 - "Petroleum and related products - Determination of the ageing behaviour of inhibited oils and fluids - TOST test - Part 4: Procedure for industrial gear oils" specifies a laboratory method to determine the accelerated ageing behaviour of industrial gear oils (categories CKC, CKD, CKS, CKT as defined in ISO 6743-6). The standard uses controlled exposure to air and elevated temperatures to evaluate oil degradation over a 312 h test period and reports changes in kinematic viscosity, insoluble content (precipitation number) and other indicators of oxidation and additive depletion.

Key topics and technical requirements

Scope: Gear oils in categories CKC, CKD, CKS and CKT.
Test principle: Oxidative ageing in glass oxidation cells under air flow and elevated temperature; end-point after 312 h ± 2 h.
Temperature by oil type:
- CKC: 95 °C
- CKD: 121 °C
- CKS / CKT: 150 °C
Air flow: 10 L/h ± 0.5 L/h per cell (air dried and oil-free).
Primary measurements:
- Kinematic viscosity at 100 °C (ISO 3104) - report increase after ageing.
- Insoluble content / precipitation number (Annex B) - quantify precipitate after solvent treatment and centrifugation.
- Visual rating of deposits and adhesivity on the tube walls.
Optional/augmenting analyses:
- Acid number increase (ISO 6618 / ISO 6619).
- Sediment content by filtration (Annex C).
- Additives content variation (Annex D).
- Infra‑red oxidation (IR spectrum, measure absorbance at 1 710 cm‑1; Annex E).
Apparatus & preparation: Borosilicate oxidation cell (300 ml oil), thermostatted heating bath, flowmeters, air dryer, calibrated thermometers, and strict glassware cleaning procedures (warning on chromosulfuric acid disposal and safety).
Reporting: Results expressed as viscosity increase, precipitation-number change, deposit severity/adhesivity and any additional test outcomes.

Applications and who uses it

Overview

Key topics and technical requirements

Scope: Gear oils in categories CKC, CKD, CKS and CKT.
Test principle: Oxidative ageing in glass oxidation cells under air flow and elevated temperature; end-point after 312 h ± 2 h.
Temperature by oil type:
- CKC: 95 °C
- CKD: 121 °C
- CKS / CKT: 150 °C
Air flow: 10 L/h ± 0.5 L/h per cell (air dried and oil-free).
Primary measurements:
- Kinematic viscosity at 100 °C (ISO 3104) - report increase after ageing.
- Insoluble content / precipitation number (Annex B) - quantify precipitate after solvent treatment and centrifugation.
- Visual rating of deposits and adhesivity on the tube walls.
Optional/augmenting analyses:
- Acid number increase (ISO 6618 / ISO 6619).
- Sediment content by filtration (Annex C).
- Additives content variation (Annex D).
- Infra‑red oxidation (IR spectrum, measure absorbance at 1 710 cm‑1; Annex E).
Apparatus & preparation: Borosilicate oxidation cell (300 ml oil), thermostatted heating bath, flowmeters, air dryer, calibrated thermometers, and strict glassware cleaning procedures (warning on chromosulfuric acid disposal and safety).
Reporting: Results expressed as viscosity increase, precipitation-number change, deposit severity/adhesivity and any additional test outcomes.

ISO 4263-4:2006 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Applications and who uses it

Abstract

Overview

Key topics and technical requirements

Applications and who uses it

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