ISO 11007-1:2021 pdf download – Petroleum products and lubricants — Determination of rust-prevention characteristics of lubricating greases — Part 1: Dynamic wet conditions.
7.4 Propan-2-ol. 7.5 Ammonia solution, 3,2 % (m/m) (1,65 mol/l). NOTE The ammonia solution is equivalent to a tenfold dilution of 35 % ammonia solution (ρ = 880 kg/m 3 ) 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 of ammonia solution (7.5). 7.7 Silver 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 (7.7) into the plummer-block. Withdraw a sample of the silver nitrate solution using a clean pipette, and inspect for milkiness or a white precipitate. If a white precipitate appears, rinse the plummer-block with hot water (7.2) and repeat this washing until a withdrawn sample is clear. 8.2 Wear protective gloves (6.8) or use tweezers (6.6) for all subsequent handling. Do not touch the bearings 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. 8.4 Wash the bearings in wash solvent (7.1) 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 been completely removed. In cases of dispute, white spirit (see NOTE to 7.1) is the referee solvent.
8.10 Place the adaptor sleeves, bearings and V-ring seals in position on the shaft and finger-tighten the sleeve nuts. Carry out the operation with the shaft suitably supported on the work bench. 8.11 Place the shaft complete with greased bearings in position in the rig, taking care that the bearings are central in the plummer-blocks. 8.12 Place the top halves of the plummer-blocks in position and finger-tighten the locking screws. 9 Test procedure 9.1 Carry out duplicate determinations at an ambient temperature of 15 °C to 25 °C. NOTE The precision data was generated under these ambient conditions.