ISO 11009:2021

Name: ISO 11009:2021 — Petroleum products and lubricants — Determination of water washout characteristics of lubricating greases
SKU: ISO 11009:2021
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Petroleum products and lubricants — Determination of water washout characteristics of lubricating greases

Название (английский):

ISO 11009:2021

Petroleum products and lubricants — Determination of water washout characteristics of lubricating greases

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 12 августа 2021 г.
Издание:: ISO IS 11009 edition 2 version 1
ICS:: 75.100

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Описание (английский):

This document specifies a method for evaluating the resistance of a lubricating grease to washout by water from a bearing, when tested at 38 °C or 79 °C under specified laboratory test conditions. This test method estimates the resistance of greases to washout from ball bearings under specified conditions. No formal correlation with field service has been established so far. This document is used for development and specification purposes. NOTE For the purposes of this document, the term “% (m/m)” is used to represent the mass fraction.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 11009:2021 - "Petroleum products and lubricants - Determination of water washout characteristics of lubricating greases" - specifies a laboratory test to evaluate a grease’s resistance to water washout from a ball bearing. The method measures the percentage mass loss of grease when exposed to a controlled water jet at either 38 °C or 79 °C, under defined apparatus and operating conditions. This standard is intended for development and specification purposes; no formal correlation with field performance has been established.

Key topics and technical requirements

Test principle: A defined mass of grease is packed into a type 6204 deep-groove ball bearing (C3 clearance) in a bronze housing; the bearing is rotated while a water jet impinges on the housing. The grease mass loss after a 60 min ± 5 min exposure gives the water washout percentage.

Critical test parameters:

Rotation speed: 63 rad/s ± 3 rad/s (≈600 min⁻¹ ± 30 min⁻¹)
Water flow: 5 ml/s ± 0.5 ml/s through a 1 mm nozzle
Nozzle-to-shield distance: 57 mm, impingement 6 mm ± 2 mm above the shield edge
Test temperatures: 38 °C or 79 °C
Grease charge: 4.00 g ± 0.05 g per bearing; tests performed in duplicate

Apparatus and materials: bronze housing with spindle/bearings, water heating and flow control, solvent for cleaning (low-sulfur hydrocarbon), and grade 3 laboratory water (ISO 3696).

Post-test handling and calculation: bearings and shields are dried (typical drying 15 h at 77 °C ± 6 °C, higher for viscous oils) and weighed. Mass-loss is calculated and reported as % (m/m) rounded to the nearest whole percent.

Visual assessment: standard includes qualitative observations of grease appearance after test (e.g., emulsified, hardened, leaking) and water appearance (clear, milky, supernatant oil).

Usage notes: the method’s precision is limited; ISO 12924 uses this test as part of the symbol 3 ("water contamination and rust protection") classification with threshold examples (e.g.,

ISO 11009:2021

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Технические детали

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