ISO 11007-1-2021 pdf free download – Petroleum products and lubricants — Determination of rust-prevention characteristics of lubricating greases — Part 1: Dynamic wet conditions.
A test portion of grease is run in a specialized and carefully cleaned test rig under specified conditions,after introduction of an aqueous test fluid (distilled water，synthetic sea water,sodium chloridesolution, user-specified solutions), for a period of approximately a week with a predetermined sequenceof running and stopping.At the end of the test period, the apparatus is dismantled and the condition ofthe outer ring track of the bearing is examined and rated according to the degree of corrosion.
5 Sampling
Unless otherwise specified, sampling shall be conducted in accordance with IS0 23572.The sampleshall be evaluated on a representative portion.Any drum, barrel, tanker compartment or any type ofcontainer delivered to the end user may be sampled and analysed at the discretion of the purchaser.
6 Apparatus and materials
6.1Test bearings, double-row self-aligning ball bearings conforming to 1306K of IlS0 15 with a steelcage or polyamide cage, specially inspected and packed to prevent rust.
6.2Test rig, as specified in Annex A.
6.3Oven, capable of maintaining a temperature of 90 C± 2 °C to dry the bearing.
6.4Dentist’s mirror, no magnification.
6.5Pipette, conforming to lSO 648, capacity of 10 ml.
6.6Tweezers, to hold the bearings.
6.7Cloth, absorbent, lint free.
6.8 Protective gloves, smooth, clean polyvinyl chloride (PVC), or polyethylene, or nitrile, or latex.
6.9 Filter paper, any suitable absorbent grade.
6.10 Tong, stainless steel or aluminium with covered forceps.
7Reagents
Use only reagents of recognized analytical grade.
7.1Wash solvent, consisting of low-sulfur, low aromatic, low volatility hydrocarbon.
NOTE White spirit according to BS 245 or mineral spirit according to ASTM D235(all classes) are suitable.7.2 Water, conforming to grade 3 of lSo 3696, as wash solvent.
7.3Test fluid, use one of the following types:a) water conforming to grade 2 of ISO 3696, or
b) synthetic sea water conforming to the specification given in ISO 7120, or
c) a 0,5 mol/l solution of sodium chloride prepared using water conforming to grade 2 of ISO 3696, ata pH of 8,0 to 8,2, by titration with sodium hydroxide solution.
NOTE Water quality of water used as a test fluid is critical and therefore is a different grade from thatspecified in 7.2.
Other water types may be used in this test, although the precision when using other water types hasnot been determined. lt is recommended that the pH of other water types is determined before use.7.4 Propan-2-ol.
7.5Ammonia solution, 3,2 % (m/m) (1,65 mol/1).
NOTE The ammonia solution is equivalent to a tenfold dilution of 35 % ammonia solution (o = 880 kg/m3)with water conforming to grade 3 of ISo 3696.This ammonia concentration is critical to the results of the test.
7.6 Solvent rinse solution, consisting of nine volumes of propan-2-ol (7.4) mixed with one volume ofammonia solution (7.5).
7.7Silver nitrate solution, 0,1 mol/l.
8 Preparation of the apparatus
8.1 Remove all traces of grease from previous tests by wiping the plummer blocks housing (see A.1).Wash the plummer blocks housing and all other parts in solvent rinse solution(7.6) followed by water(7.2). Dry thoroughly using a cloth (6.7).
Where previous tests have been carried out with either synthetic sea water [7.3.b)] or salt water[7.3.c)], pour a few drops of silver nitrate solution (77) into the plummer-block. Withdraw a sampleof the silver nitrate solution using a clean pipette, and inspect for milkiness or a white precipitate. if awhite precipitate appears, rinse the plummer-block with hot water(7.2) and repeat this washing until awithdrawn sample is clear.
8.2 Wear protective gloves (6.8) or use tweezers (6.6) for all subsequent handling. Do not touch thebearings with bare fingers.Use two new bearings for each test.
8.3 Number the bearings on the outside diameter of the outer ring but do not use acid etching.A “vibro pen” or etching marker may be used.
8.4Wash the bearings in wash solvent(Z.1) at 50 C to 65 °C, to remove the rust-preventative.
Repeat the wash using fresh portions of hot wash solvent until the rust-preventative has beencompletelv removed.In cases of disoute.white spirit (see NOTE to 7.1]is the referee solvent.ISO 11007-1 pdf download.