1、Designation:D292198(Reapproved 2011)Standard Test Method forQualitative Tests for the Presence of Water Repellents andPreservatives in Wood Products1This standard is issued under the fixed designation D2921;the number immediately following the designation indicates the year oforiginal adoption or,in
2、 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 covers simple qualitative field orlaboratory tests to determine water re
3、pellency or the presenceof chlorinated phenol2preservative chemicals in wood prod-ucts that are specified to be water repellent preservative treated.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are for informationonly.1.3 This standard does not purp
4、ort to address all of thesafety concerns,if any,associated with its use.It 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 U.S.Federal Specificati
5、on:TT-W-572 Wood Preservative Water-Repellant32.2 NIST Standard:262-63 Water Repellent Preservative Non-Pressure Treat-ment for Mill Work43.Significance and Use3.1 Although chlorinated phenol-treated wood has becomeless common due to environmental concerns,repellent-treatedwood is commonly specified
6、 in construction.This test methodprovides a means to verify the presence of a significant level ofwater repellent protection.4.Apparatus4.1 Eyedropper,plastic squeeze bottle or similar means formetering drops of water.4.2 Flame Source,such as bunsen burner,butane torch,oralcohol burner.4.3 Copper Wi
7、re Coil Specimen Holder(or Other SuitableCopper Holder)A suitable copper wire coil can be made byusing a lead pencil as a mandrel to form a helix using copperwire of about 1.6 to 2.4 mm(116to332in.)in diameter.Leavea space of approximately the diameter of the wire between eachloop.The helix should b
8、e 19 to 25 mm(34to 1 in.)in length.Leave a pigtail of about 152 mm(6 in.)of wire at one end ofthe helix and form a loop of approximately 25 mm(1 in.)indiameter to be used as a holder for the coil.4.4 Sharp Knife.5.Water Repellent Test5.1 Place uncut wood items to be tested so that the end grainis ex
9、posed as a horizontal surface.If the end grain cannot be sopositioned,comparisons can be made on the flat grain but withless definitive results.5.2 With an eye dropper,or similar device,allow severaldrops of water to fall from about 13 mm(12in.)on the endgrain of the wood.Wait 5 min and then observe
10、 the degree ofpenetration.With flat grain or vertical grain surfaces,waitingperiods of 10 to 15 min may be necessary.5.3 Water drops that immediately flatten out,penetrate anddarken the wood,indicate that the wood has not been treatedwith a water repellent.5.4 Water drops that“bead-up”and remain as
11、spheres,withlittle or no color change or penetration,indicate that the woodhas been treated with a water repellent.Water repellentpreservatives,meeting Fed.Spec.TT-W-572 and NBS Stan-dard 262-63,impart sufficient water repellency to the end grainof wood to cause water drops to bead up and form spher
12、es.6.Preservative Test6.1 Chlorinated phenol based wood preservatives emit acharacteristic green flame upon pyrolysis within a ventilatedcopper envelope due to the release of chlorine and its conse-quent reaction with copper(Beilsteins test).Untreated woodproduces a yellow-orange flame but any chlor
13、ine containingcompound will give a positive test.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.52 on Factory Coated Wood Products.Current edition approved June 1,2011.Publi
14、shed June 2011.Originallyapproved in 1970.Last previous edition approved in 2005 as D2921 98(2005).DOI:10.1520/D2921-98R11.2Pentachlorophenol,tetrachlorophenol and other chlorinated phenols.3Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA1911
15、1-5098,http:/dodssp.daps.dla.mil.4Available from National Institute of Standards and Technology(NIST),100Bureau Dr.,Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 6.2 Using the copp
16、er wire specimen holder,described in4.3,hold the coil portion in the flame until it burns with acharacteristic yellow-orange color.This preheated coil is thenallowed to cool.6.3 With a knife,cleaned by heating after each use,cut asplinter from the specimen of wood to be tested.Samplesshould be taken near the end of the wood items where end grainis exposed and where normal concentration of the preservativechemicals is greatest.The size of the wood sample should besmaller than the length and inner