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1、 Reference number ISO 4263-3:2006(E) ISO 2006 INTERNATIONAL STANDARD ISO 4263-3 First edition 2006-02-01 Petroleum and related products Determination of the ageing behaviour of inhibited oils and fluids TOST test Part 3: Anhydrous procedure for synthetic hydraulic fluids Ptrole et produits connexes
2、Dtermination du comportement au vieillissement des fluides et huiles inhibs Essai TOST Partie 3: Mthode anhydre pour les fluides hydrauliques synthtiques Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not
3、 for Resale, 04/18/2007 19:58:44 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 4263-3:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the
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6、nlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2006 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including
7、 photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published i
8、n Switzerland ii ISO 2006 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 19:58:44 MDTNo reproduction or networking permitted without license from IHS -,-,- I
9、SO 4263-3:2006(E) ISO 2006 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Principle. 2 4 Reagents and materials . 2 5 Apparatus 3 6 Sampling 11 7 Preparation of materials and apparatus. 11 8 Procedure 12 9 Calculation. 13 10 Expression of results . 13 11 Pr
10、ecision 14 12 Test report . 14 Annex A (normative) Liquid-in-glass thermometer specifications. 15 Annex B (normative) Procedure for packaging and storage of catalyst coils. 16 Annex C (informative) Method for the determination of the insolubles content of mineral oils and anhydrous synthetic fluids
11、17 Annex D (informative) Appearance rating of catalyst coil wires. 19 Annex E (informative) Determination of metals content 20 Bibliography. 21 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resal
12、e, 04/18/2007 19:58:44 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 4263-3:2006(E) iv ISO 2006 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work o
13、f preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmenta
14、l, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main
15、 task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Atte
16、ntion is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 4263-3 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants. ISO 4263 con
17、sists of the following parts, under the general title Petroleum and related products Determination of the ageing behaviour of inhibited oils and fluids TOST test: Part 1: Procedure for mineral oils Part 2: Procedure for category HFC hydraulic fluids Part 3: Anhydrous procedure for synthetic hydrauli
18、c fluids Part 4: Procedure for industrial gear oils Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 19:58:44 MDTNo reproduction or networking permitted without license from IHS -
19、,-,- INTERNATIONAL STANDARD ISO 4263-3:2006(E) ISO 2006 All rights reserved 1 Petroleum and related products Determination of the ageing behaviour of inhibited oils and fluids TOST test Part 3: Anhydrous procedure for synthetic hydraulic fluids WARNING The use of this part of ISO 4263 may involve ha
20、zardous materials, operations and equipment. This part of ISO 4263 does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this part of ISO 4263 to establish appropriate safety and health practices and determine the applicability of reg
21、ulatory limitations prior to use. 1 Scope This part of ISO 4263 specifies a method for the determination of the ageing behaviour of synthetic hydraulic fluids of categories HFDR, HFDU, HEES and HEPG as defined e.g. in ISO 129224 and ISO 153805. The ageing is accelerated by the presence of oxygen and
22、 metal catalysts at elevated temperature, and the degradation of the fluid is followed by changes in acid number. Other parts of ISO 4263 specify similar procedures for the determination of ageing behaviour of mineral oils and specified categories of fire-resistant fluids used in hydraulic and other
23、 applications. NOTE Other signs of fluid deterioration, such as the formation of insoluble sludge, catalyst coil corrosion or decrease in viscosity, can occur, which indicate oxidation of the fluid, but are not reflected in the calculated oxidation lifetime. The correlation of these occurrences with
24、 field service is under investigation. This test method can be used to compare the oxidation stability of fluids that are not prone to contamination with water. However, because of the large number of individual field-service applications, the correlation between the results of this test and actual
25、service performance can vary markedly, and is best judged on experience. The precision of this test method for synthetic hydraulic fluids is not known because interlaboratory data are not available. This method might not be suitable for use in specifications or in the event of disputed results as lo
26、ng as these data are not available. However, precision for inhibited turbine oils is given in Clause 11 for guidance as an indication of the precision that could be obtained for synthetic hydraulic fluids. 2 Normative references The following referenced documents are indispensable for the applicatio
27、n of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3170:2004, Petroleum liquids Manual sampling ISO 3696:1987, Water for analytical laboratory use Specification and te
28、st methods ISO 7537:1997, Petroleum products Determination of acid number Semi-micro colour-indicator titration method Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 19:58:44 MD
29、TNo reproduction or networking permitted without license from IHS -,-,- ISO 4263-3:2006(E) 2 ISO 2006 All rights reserved 3 Principle A test portion is reacted, in the absence of light, at 95 C with oxygen and a steel and copper catalyst coil. Small aliquots of the fluid are withdrawn at regular int
30、ervals and the acid number is measured (see the Note in Clause 1). The test is continued until an acid number increase of 2,0 mg of potassium hydroxide (KOH) per gram of test portion is reached and the number of hours is recorded as the oxidation life. For some requirements, the test may be disconti
31、nued at a fixed number of hours (e.g. 500 h or 1 000 h) when the value of the acid number is still below 2,0 mg of KOH per gram of test portion. 4 Reagents and materials 4.1 Water, unless otherwise specified, in accordance with the requirements of grade 2 of ISO 3696:1987. Potable water means tap wa
32、ter, unless normal piped supplies are contaminated with particulate or highly soluble mineral content. 4.2 Heptane (C7H16), of minimum purity 99,75 %. 4.3 Acetone (CH3COCH3), of general purpose reagent grade (GPR). 4.4 Propan-2-ol (CH3CHOHCH3), of general purpose reagent grade (GPR). 4.5 Oxygen, of
33、minimum purity 99,5 %, supplied through a pressure-regulation system adequate to maintain the specified flow rate throughout the test duration. Supply from an oxygen cylinder should be via a two-stage regulation system and a needle valve to improve the consistency of gas-flow regulation. WARNING Use
34、 oxygen only with equipment validated for oxygen service. Do not allow oil or grease to come into contact with oxygen and clean and inspect all regulators, gauges and control equipment. Check the oxygen-supply system regularly for leaks. If a leak is suspected, turn off immediately and seek qualifie
35、d assistance. 4.6 Cleaning solutions 4.6.1 Strong oxidizing acid solution The reference strong oxidizing cleaning solution on which precision was based, is chromosulfuric acid (see the following warning), but alternative non-chromium containing solutions, such as ammonium persulfate in concentrated
36、sulfuric acid (8 g/l) have been found to give satisfactory cleanliness. A 10 % solution of three parts of hydrochloric acid (1 mol/l) and one part of orthophosphoric acid (concentrated GPR grade) removes iron oxide deposits. WARNING Chromosulfuric acid is a health hazard. It is toxic, a recognized c
37、arcinogen as it contains Cr(VI) compounds, highly corrosive and potentially hazardous in contact with organic materials. When using chromosulfuric acid cleaning solution, eye protection and protective clothing are essential. Never pipette the cleaning solution by mouth. After use, do not pour cleani
38、ng solution down the drain, but neutralize it with great care owing to the concentrated sulfuric acid present, and dispose of it in accordance with standard procedures for toxic laboratory waste (chromium is highly dangerous to the environment). Strongly oxidizing acid cleaning solutions that are ch
39、romium-free are also highly corrosive and potentially hazardous in contact with organic materials, but do not contain chromium which has special disposal problems. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972
40、545001 Not for Resale, 04/18/2007 19:58:44 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 4263-3:2006(E) ISO 2006 All rights reserved 3 4.6.2 Surfactant cleaning fluid A proprietary strong surfactant cleaning fluid is a preferred alternative. 4.6.3 Laboratory detergent
41、 The detergent shall be water soluble. 4.7 Catalyst wires 4.7.1 Low-metalloid steel wire, of diameter 1,60 mm 0,05 mm, made of carbon steel, soft bright annealed and free from rust. 4.7.2 Copper wire, of diameter 1,63 mm 0,05 mm, made of either electrolytic copper wire of 99,9 % minimum purity or so
42、ft copper wire of an equivalent grade. 4.8 Abrasive cloth, made of silicon carbide of 150 m (100-grit) with cloth backing, or an equivalent grade of abrasive cloth. 4.9 Absorbent cotton 5 Apparatus 5.1 Oxidation cell, consisting of a large test tube of borosilicate glass with a graduation mark to in
43、dicate a volume of 300 ml 1 ml at 20 C. A mushroom condenser and oxygen-delivery tube, also of borosilicate glass, fit into the test tube. The design and dimensions shall be as illustrated in Figure 1. 5.2 Heating bath, consisting of a thermostatically controlled bath capable of maintaining the hydr
44、aulic fluid test portion in the oxidation cell at 95,0 C 0,2 C. It shall be large enough to hold the required number of oxidation cells (5.1) immersed in the heat transfer medium to a depth of 355 mm 10 mm. It shall be constructed to ensure that light is excluded from the test portions during the te
45、st. If a fluid bath is used, it shall be fitted with a suitable stirring system to provide a uniform temperature throughout the bath. If the fluid bath is fitted with a top, the total length of the oxidation cell within the bath shall be 390 mm 10 mm. If a metal-block bath is used, the heaters shall
46、 be distributed so as to produce a uniform temperature throughout the bath, and the holes in the block shall have a minimum diameter of 50 mm and a depth, including any insulating cover, of 390 mm 10 mm. 5.3 Flowmeter, capable of measuring 3,0 l/h with an accuracy of 0,1 l/h. Copyright International
47、 Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 19:58:44 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 4263-3:2006(E) 4 ISO 2006 All rights reserved Dimensions in millim
48、etres (unless otherwise indicated) b) First stage c) Second stage a) Apparatus d) Final stage Key 1 glass condenser 4 catalyst coil a Bend over mandrel of diameter 26. 2 oxygen-delivery tube 5 radius of bottom cell b Grind end of tube. 3 fluid sample c External diameter. Figure 1 Oxidation cell Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/18/2007 19:58:44