1、Designation: D5800 142Standard Test Method forEvaporation Loss of Lubricating Oils by the Noack Method1This standard is issued under the fixed designation D5800; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revi
2、sion. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTEEq 11 was corrected editorially in January 2015.2NOTESubsection 20.21 was corrected editorially in February 2015.1. Scope*1.1 This tes
3、t method covers three procedures for determin-ing the evaporation loss of lubricating oils (particularly engineoils). Procedure A uses the Noack evaporative tester equip-ment; Procedure B uses the automated non-Woods metalNoack evaporative apparatus; and Procedure C uses Selby-Noack volatility test
4、equipment. The test method relates to oneset of operating conditions but may be readily adapted to otherconditions when required.1.2 Noack results determined using Procedures A and Bshow consistent differences. Procedure A gives slightly lowerresults versus Procedure B on formulated engine oils, whi
5、leProcedure A gives higher results versus Procedure B onbasestocks.1.3 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It
6、is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D4057 Practice for Manual Sampling of Petroleum andPetroleum ProductsD4177 Practi
7、ce for Automatic Sampling of Petroleum andPetroleum ProductsD6299 Practice for Applying Statistical Quality Assuranceand Control Charting Techniques to Evaluate AnalyticalMeasurement System PerformanceD6300 Practice for Determination of Precision and BiasData for Use in Test Methods for Petroleum Pr
8、oducts andLubricants2.2 DIN Standards:3DIN 1725 Specification for Aluminum AlloysDIN 12785 Specifications for Glass Thermometers3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 evaporation lossof a lubricating oil by the Noackmethod, that mass of volatile oil vapors lost when t
9、he oil isheated in a test crucible through which a constant flow of air isdrawn.3.1.2 volatility, nthe tendency of a liquid to form a vapor.4. Summary of Test Method4.1 A measured quantity of sample is placed in an evapo-ration crucible or reaction flask that is then heated to 250Cwith a constant fl
10、ow of air drawn through it for 60 min. Theloss in mass of the oil is determined.4.2 Interlaboratory tests have shown that Procedure A,Procedure B, and Procedure C yield essentially equivalentresults, with a correlation coefficient of R2= 0.996. See theresearch report for the Selby-Noack interlaborat
11、ory study.5. Significance and Use5.1 The evaporation loss is of particular importance inengine lubrication. Where high temperatures occur, portions ofan oil can evaporate.5.2 Evaporation may contribute to oil consumption in anengine and can lead to a change in the properties of an oil.5.3 Many engin
12、e manufacturers specify a maximum allow-able evaporation loss.5.4 Some engine manufacturers, when specifying a maxi-mum allowable evaporation loss, quote this test method alongwith the specifications.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels
13、, and Lubricants and is the direct responsibility ofSubcommittee D02.06 on Analysis of Liquid Fuels and Lubricants.Current edition approved Oct. 1, 2014. Published October 2014. Originallyapproved in 1995. Last previous edition approved in 2008 as D5800 10. DOI:10.1520/D5800-14E02.2For referenced AS
14、TM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from Deutsches Institut fr Normunge, Beuth Verlag GmbH, Burg-grafen
15、Strasse 6, 1000 Berlin 30, Germany.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.5 Procedure C, using the Selby-Noack apparatus, alsopermits collection of the volati
16、le oil vapors for determinationof their physical and chemical properties. Elemental analysis ofthe collected volatiles may be helpful in identifying compo-nents such as phosphorous, which has been linked to prematuredegradation of the emission system catalyst.Procedure A6. Apparatus6.1 Noack Evapora
17、tive Tester, comprising the following:6.1.1 Electrically Heated Block Unit, made from a mal-leable aluminum alloy (see DIN 1725, Sheet 1), insulated at thejacket and base against loss of heat. (WarningThis block isheated to 250C.) The block is heated electrically by a base andjacket heater, having a
18、 total power consumption of 1 to 1.2 kW.In this respect the difference between both individual powerconsumption should not exceed 0.15 kW. In the center of theheating block, there is a circular recess to insert the evaporatingcrucible, the space between block and crucible being filled withWoods allo
19、y or a suitable equivalent. Two catches on the blockprevent the crucible from rising in the liquid metal bath. Twoadditional circular recesses at equal intervals from the center ofthe block are provided for the thermometers (see Fig. 1).6.1.2 Evaporating Crucible, with screw cover. The crucibleis ma
20、de of stainless steel (see Fig. 2). Above the support ringis the thread for the cover. The nickel-plated brass cover ishermetically sealed to the crucible by an internal conicalsealing surface (see Fig. 3). Three nozzles of hardened steelpermit the air stream to pass through the cover. The extractio
21、ntube, which slopes downward, leads from a threaded and sealedconnection in the center of the cover.6.2 Balance, capable of weighing at least 200 g to thenearest 0.01 g.6.3 Crucible Clamp and Spanner.6.4 Reamer, 2-mm diameter.6.5 Ball Bearing, 3.5-mm diameter.6.6 Thermometer, M260 (see DIN 12785) or
22、 temperaturesensing device capable of reading temperature to 0.1C. Thethermometer should be calibrated with appropriate procedureat appropriate frequency (generally every six months).6.7 Contact Type Control Thermometer (for manual).6.8 Glass Y-piece, an internal diameter of 4 mm.The uprightarms, ea
23、ch 45-mm long, should form an angle such that the armconnected to the crucible extraction tube and the Y-piece forma straight line. The vertical arm is 60-mm long and beveled at45.6.9 Glass Delivery Tubes, an internal diameter of 4 mm,each arm length 100 mm, beveled at 45 at ends entering andleaving
24、 the bottles.6.9.1 Bent at an angle of approximately 80.6.9.2 Bent at an angle of approximately 100, length to 20mm of bottle base.6.9.3 Bent at an angle of approximately 90.6.10 Two Glass Bottles, approximately 2-L capacity, fittedwith rubber bungs bored to receive inlet and outlet tubes (seeFig. 4
25、).6.11 Manometer, inclined form, water-filled, precision 0.2mm H2O or suitable pressure sensor capable of measuring 206 0.2 mm of H2O (a 0 to 50-mm H2O pressure transducer hasbeen found to be satisfactory).NOTE 1Some manometers use water as the reference fluid, others mayuse a lower density fluid co
26、rrelated to read in millimetres of water. Usersshould ensure that the manometer is filled with the correct densityreference fluid.6.12 Glass T-Piece, with bleed valve attached.6.13 Vacuum Pump.6.14 Timer, with accuracy of 0.2 s.6.15 Silicone Rubber Tubing, cut to size, with an internaldiameter of 4
27、mm.6.15.1 40-mm long; three pieces required,6.15.2 300-mm long, and6.15.3 100-mm long.NOTE 2The use of automated equipment is permissible as long as itgives equivalent results specified in this test method. All hardwaredimensions, make-up of the block, crucible, heat capacity, and so forth,and glass
28、ware must conform to the specifications given in this testmethod.7. Reagents and Materials7.1 Cleaning SolventA mixture of naphtha and toluene isrecommended for the cleaning of the crucible. (WarningFlammable, vapor harmful.) Overnight soaking may be neces-sary.7.2 Oils having a known evaporative lo
29、ss, the value ofwhich is provided by the oil supplier. Some examples of suchoils include RL-N, RL 172, and RL 223, supplied by CEC.Other oils supplied by other vendors may also be used.7.3 Insulated Gloves.7.4 Paint Brush, such as a tinnerps acid brush (15 to 25-mmwidth).7.5 Woods Metal4or Suitable
30、Heat Transfer Material(WarningWoods metal contains lead (25 %), bismuth(50 %), antimony (12.5 %), and cadmium (12.5 %); these havebeen found to be health hazardous. Avoid contact with skin atall times.)8. Hazards8.1 Safety HazardsIt is assumed that anyone using thistest method will either be fully t
31、rained and familiar with allnormal laboratory practices, or will be under the direct super-vision of such a person. It is the responsibility of the operatorto ensure that all local legislative and statutory requirementsare met.4The sole source of supply of Woods metal known to the committee at this
32、timeis Sigma-Aldrich, Customer Support, P.O. Box 14508, St. Louis, MO 63178. If youare aware of alternative suppliers, please provide this information to ASTMInternational Headquarters. Your comments will receive careful consideration at ameeting of the responsible technical committee,1which you may
33、 attend.D5800 1422NOTE 1All dimensions in millilitres.FIG. 1 Heating BlockD5800 14238.2 (WarningThough the test method calls for a draft-free area, the exhaust fumes from the evaporating oil must beventilated to an outside source. Precaution shall be taken toavoid any possibility of fire or explosio
34、n.)NOTE 3One way to achieve a draftfree environment and greatersafety in operation for the instruments used in this test method is describedin Appendix X3.8.3 An alternate means for preventing draft described inAppendix X3 was not used in the development of the testmethod precision statement.9. Prep
35、aration of Apparatus9.1 Astandard assembly of the apparatus is shown in Fig. 5.To avoid disturbing the thermal equilibrium, the apparatusshall be assembled in a draftfree area and comply with Fig. 5in dimensions and apparatus. (See 8.2.)9.2 Add sufficient Woods metal or equivalent material to therec
36、esses of the heating block so that, with the crucible andthermometer in place, the remaining spaces will be filled withthe molten metal.9.3 Using the highest heating rate possible, raise the tem-perature of the heating block until the Woods metal is molten.Insert the thermometers with their bulbs to
37、uching the bottom ofthe recesses, and ensure that the contact thermometer isplugged in the back of the heating block. Adjust the powersupplied to the heating block so that the temperature can bemaintained at 250 6 0.5C.9.4 Assemble the remaining apparatus, less the crucible, asshown in Fig. 5.9.5 Pl
38、ace an empty crucible in the heating block, securingthe flange under the screw heads against the buoyancy of theWoods metal. The level of the molten metal should be such thata trace of it can be seen at the flange of the crucible and the topof the heating block.9.6 Check that the readings can be obt
39、ained on the manom-eter scale, or other measuring device, by connecting thecrucible to the assembled apparatus. A reading of 20.0 6 0.2mm shall be obtained.9.7 Disconnect and remove the crucible from the assembledapparatus.9.8 Switch off the pump and the heating block and raise thecrucible and the t
40、hermometers from the molten Woods metal.Using the brush, return any Woods metal clinging to thecrucible to the heating block.9.9 Clean the Y-piece and glass tubing to prevent a build upof condensate.NOTE 1All dimensions in millilitres.FIG. 2 CrucibleNOTE 1All dimensions in millilitres.FIG. 3 CoverD5
41、800 142410. Verification10.1 Switch on the pump and the heating block and ensurethat the apparatus is assembled, minus the crucible, as shownin Fig. 5.10.2 Check that the crucible and cover are free from lacquer.10.2.1 After every test, clean the crucible and cover withsolvent and allow to dry. Stub
42、born lacquer can be cleaned byabrasion from a glass beader under pressure.10.3 Pass the reamer through each of the three nozzles in thecover to ensure that they are clear. (WarningUsing a reamerwith a diameter larger than 2 mm can enlarge the nozzles. Thiscan lead to higher losses because of increas
43、ed air flow.)10.4 Run the ball bearing through the extraction tube toensure that it is clear of dirt.10.5 Weigh the empty crucible without its cover to thenearest 0.01 g.10.6 Weigh into the crucible 65.0 6 0.1 g of the ReferenceOil.10.7 Screw on the cover using the clamp and spanner.10.8 Ensure the
44、temperature of the heating block is at 250 60.5C. Place the crucible in its recess in the heating block,securing the flange under the screw heads against the buoyancyof the Woods metal. Switch the control of the heating block tocompensate for the heat capacity of the crucible. Immediately(in less th
45、an 5 s), connect the extraction tube of the crucible tothe arm of the glass Y-piece, making a butt joint.Simultaneously, start the pump and the stopwatch and adjustthe bleed valve to give a pressure differential of 20 6 0.2 mm.NOTE 4When the crucible is in the test position, its flange should beflus
46、h with the top of the heating block. Any protrusion of the crucibleflange above the heating block may suggest a buildup of Woods metal slagat the bottom of the heating block recess. The heating block and thethermometer recesses should be cleaned and the Woods metal replaced ona regular basis to avoi
47、d the accumulation of slag. Oxidized Woods metalwill affect the heat transfer to the crucible and hence may have adeleterious effect on the results obtained.10.9 Adjust the control on the heating block to maintain theblock temperature approximately 5C below the test tempera-ture. Readjust the temper
48、ature control so that the test tempera-ture is reestablished within 3 min of the start of the test.NOTE 5Temperature and pressure will be controlled automaticallywhen automated equipment is used.10.10 At the start of the test, constant attention shall be paidto maintaining the correct pressure. Once
49、 this becomes steady,usually within 10 to 15 min, check periodically that thetemperature and pressure differential remain constant through-out the period of the test.10.11 After 60 min 6 5 s, lift the crucible from the heatingblock, remove any adhering alloy, and place the crucible in awarm water bath to a depth of at least 30 mm. The time periodfrom the end of the test to immersion of the crucible shall notexceed 60 s.10.12 After 30 min, remove the crucible from the water, drythe outside, and carefully remove the lid.10.13 Reweigh the cr
