ASTM D4042-1993(2014) Standard Test Method for Sampling and Testing for Ash and Total Iron in Steel Mill Dispersions of Rolling Oils《轧钢厂冷轧油弥散物中灰粉和铁总含量的取样和试验的标准试验方法》.pdf
《ASTM D4042-1993(2014) Standard Test Method for Sampling and Testing for Ash and Total Iron in Steel Mill Dispersions of Rolling Oils《轧钢厂冷轧油弥散物中灰粉和铁总含量的取样和试验的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D4042-1993(2014) Standard Test Method for Sampling and Testing for Ash and Total Iron in Steel Mill Dispersions of Rolling Oils《轧钢厂冷轧油弥散物中灰粉和铁总含量的取样和试验的标准试验方法》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D4042 93 (Reapproved 2014)Standard Test Method forSampling and Testing for Ash and Total Iron in Steel MillDispersions of Rolling Oils1This standard is issued under the fixed designation D4042; the number immediately following the designation indicates the year oforiginal adoption or, i
2、n the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method describes a procedure for sampling andtesting dispersions of roll
3、ing oils in water from operating steelrolling mills for determination of ash and total iron content. Itspurpose is to provide a test method such that a representativesample may be taken and phenomenon such as iron separation,fat-emulsion separation, and so forth, do not contribute toanalytical error
4、 in determination of ash and total iron.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 concerns, if any, associated with its use. It is theresponsibility of th
5、e user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. For specificwarning statements, see Sections 6 and 7.2. Referenced Documents2.1 ASTM Standards:2D482 Test Method for Ash from Petroleum ProductsD1068
6、 Test Methods for Iron in WaterD1193 Specification for Reagent WaterD2795 Test Methods for Analysis of Coal and Coke Ash(Withdrawn 2001)3E50 Practices for Apparatus, Reagents, and Safety Consid-erations for Chemical Analysis of Metals, Ores, andRelated MaterialsE832 Specification for Laboratory Filt
7、er Papers3. Summary of Test Method3.1 Polyethylene disposable sample bags in a suitable hold-ing device are used to collect representative samples ofnonhomogeneous dispersions of rolling mill oils in water froman operating mill coolant system.3.2 The collected sample and disposable bag are analyzed
8、asone for ash and total iron.3.2.1 Ash content is determined gravimetrically by evapo-rating all water from the sample bag before heating the residueand bag in a muffle furnace to a constant weight (Test MethodD482).3.2.2 Total iron content is determined by digesting the ironin the ashed sample and
9、bag in an acidified solution. The ironin the solution is reduced with stannous chloride and titratedwith standardized potassium dichromate.3.2.3 The ash and total iron contributed by a sample bagalone are determined separately and are subtracted from thevalues of bag and sample to obtain the values
10、for the samplealone.NOTE 1There are a number of alternative methods available fordetermining total iron in an ashed solution such as Test Methods D2795and D1068.4. Significance and Use4.1 The life cycle and cleanliness of a recirculating steelmill rolling oil dispersion is affected by the amount of
11、ironpresent. This iron consists mainly of iron from acid picklingresidues and iron from attrition of the steel sheet or rolls duringcold rolling. In sampling rolling oils for total iron it is difficultto prevent adherence of iron containing sludge to the samplecontainer. Thus, the accuracy of a tota
12、l iron determination froman aliquot sample is suspect. This practice provides a means forensuring that all iron contained in a sample is included in theanalysis.4.2 Although less significant, the ash content is still anessential part of the procedure for obtaining a total ironanalysis. Generally, th
13、e ash will be mostly iron, and in manycases, could be used as a substitute for total iron in determiningwhen to change the dispersion.5. Sampling5.1 Apparatus:1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lubricants and is the direct respon
14、sibility ofSubcommittee D02.L0.04 on Metal Deformation Fluids and Lubricants.Current edition approved May 1, 2014. Published July 2014. Originally approvedin 1981. Last previous edition approved in 2009 as D4042 93 (2009). DOI:10.1520/D4042-93R14.2For referenced ASTM standards, visit the ASTM websit
15、e, 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.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,
16、100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.1.1 Disposable Plastic (Polyethylene) Sampling Bags4177and 473 cm3(6 and 16 oz) complete with closure wire.5.1.2 Holding Fixture.NOTE 2A plastic baby bottle holder with an open 177-cm3(6-oz)sampling bag inserted ma
17、kes a suitable holder.5.1.3 Sampling Cup and Handle.NOTE 3Ahockey stick or similar formed apparatus of steel, plastic, orwood with or without a separate cup can be used to hold the holdingfixture or the fixture itself can be attached to the handle (see Fig. 1).5.2 Sampling Procedure:5.2.1 Weigh a nu
18、mber of identified sample bags on ananalytical balance to the nearest 0.1 mg. Record the weight ofeach as WB1.5.2.2 Using a different, preweighed, identified plastic dis-posable sampling bag for each sample, remove samples fromthe mill only while the coolant is circulating and the millrunning. Take
19、samples from the same location between thesecond and third stand whenever possible. Fill the bag approxi-mately two thirds full to allow for tying of the bag.NOTE 4Occasionally, due to mill configuration or other reasons, itmay be advisable to obtain the sample from other points in the millsystem. I
20、f so, record complete details on location and time of sampling.5.2.3 Tie and seal each sample with the wire provided inanother disposable plastic sampling bag 473 cm3(16 oz) toprevent loss of material in transit. Individual rigid plasticbottles of suitable size are also satisfactory containers forsh
21、ipment and can be substituted for the outer 473-cm3(16-oz)plastic bag.5.2.4 Take extreme care not to soil the exterior of thesampling bag with the dispersion or any foreign material.6. Ash Content6.1 Apparatus:6.1.1 Borosilicate-Glass Beaker, 400-mL, or EvaporatingDish, 350-mL, designed for ashing i
22、n an electric furnace. Donot use platinum crucibles because of the tendency to alloywith metallic iron.6.1.2 Electric Muffle Furnace, capable of maintaining atemperature of 775 6 25C (1427 6 45F), preferably havingsuitable apertures at the front and rear that allow a slow naturaldraft of air to pass
23、 through.6.1.3 Oven, capable of maintaining a temperature of 105 62C (221 6 4F).6.1.4 Analytical Balance, 200-g capacity, accurate to0.1 mg.6.1.5 Top-Loading Balance, 600-g minimum capacity, ac-curate to 0.01 g.6.2 Procedure:6.2.1 Heat the empty beaker or evaporating dish at 700 to800C (1240 to 1470
24、F) for 10 min or more. Cool at roomtemperature in a suitable container (Note 5) and weigh on ananalytical balance to the nearest 0.1 mg.NOTE 5The container in which the beaker or evaporating dish iscooled should not contain a desiccating agent.6.2.2 Remove the bagged sample from its carrier containe
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