1、Designation:D394412Standard Test Method forSolidification Point of Petroleum Wax1This standard is issued under the fixed designation D3944;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parenthe
2、ses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers a procedure for rapidly deter-mining the solidification point of petroleum wax.NOTE1This test method is also applicable to similar m
3、aterials such assynthetic waxes but the precision may vary.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety problems,if any,associated with its use.It is therespo
4、nsibility 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:2D87 Test Method for Melting Point of Petroleum Wax(Cooling Curve)D127 Test Method for Drop Me
5、lting Point of PetroleumWax,Including PetrolatumD938 Test Method for Congealing Point of PetroleumWaxes,Including PetrolatumE1 Specification for ASTM Liquid-in-Glass Thermometers3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 solidification point of petroleum wax,nthat tempera-
6、ture in the cooling curve of the wax where the slope of thecurve first changes significantly as the wax sample changesfrom a liquid to a solid state.4.Summary of Test Method4.1 A 50-mg sample of wax is placed in a test tube atambient temperature and heated above the solidification pointof the wax sa
7、mple.A thermocouple probe,attached to arecorder,is inserted into the wax sample,which is allowed tocool at room temperature.The thermocouple response of thecooling wax traces a curve on the chart paper of the recorder.The first significant change in the slope of the curve is thesolidification point.
8、5.Significance and Use5.1 The related methods of determining the melt point ofpetroleum wax are relatively time-consuming.This methodendeavors to reduce the duration of testing significantly and atthe same time maintain a reasonable precision.This methodcan be useful for quality control of petroleum
9、 waxes as well asresearch and product development work on these waxes.5.2 For methods used for testing melt points of petroleumwaxes,see Tests Method D87,D127,including Petrolatum andTest Method D938.6.Apparatus6.1 Thermocouple,with an iron-constantan junction.36.2 Recorder,capable of recording volt
10、age and equippedwith a time-base module.The recorder should have thefollowing minimum specifications:6.2.1 Span,0 to 10 mV or other suitable ranges.6.2.2 Accuracy,0.25%of full scale.6.2.3 Step Response Time,1-s full scale,3-s full scale is alsoappropriate.6.2.4 Zero Junction/Reference Junction/Tempe
11、rature Com-pensated JunctionMust be included.6.3 TFE-Fluorocarbon Holder AdapterSee Fig.1 and Fig.2.46.4 TFE-Fluorocarbon Disk Centering GuideSee Fig.1and Fig.2.41This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct respo
12、nsibility ofSubcommittee D02.10.0A on Physical/Chemical Properties.Current edition approved Dec.1,2012.Published February 2013.Originallyapproved in 1980.Last previous edition approved in 2005 as D394488(2005).DOI:10.1520/D3944-12.2For referenced ASTM standards,visit the ASTM website,www.astm.org,or
13、contact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Suitable thermocouples are available from:Claud S.Gordon Co.,5710Kenosha St.,Richmond,IL 60071,(815)678-2211.For“J”(iron-constantan)ju
14、nction the following is suitable:Xactpak Type MM Assembly,Catalog No.402-1101.Junction:grounded(G)Transition fitting:TH 2780-020Thermocouple wire:J30-1-305L(length of metal sheath)E(lead length):specify length desired.4Not commercially available and hence must be made in a machine shop orelsewhere.*
15、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 States1 6.5 Test Tubes,6 by 50-mm.6.6 Vial,25 by 52-mm.6.7 Apparatus for Calibrating Temperature Recorder:6.7.1 Stainless Steel Beaker
16、,1000-mL.6.7.2 Heating Mantle,to fit 6.7.1.6.7.3 Autotransformer to control heat to 6.7.2.6.7.4 Variable-Speed-Stirrer.6.7.5 Thermometer,or other temperature measuring device,as specified in A1.1.6.8 Methods for Heating Specimen:6.8.1 Hot Air Blower at 1000 W,1200 W,or other suitablepower.This could be a laboratory or a household hair dryertype.6.8.2 Aluminum Heating Block,about 50 by 50 by 50 mm.In the center of one face of the block,a hole is made 7 mm indiameter and 37 mm deep to accommodate
