1、Designation:D500902(Reapproved 2011)Standard Test Method forEvaluating and Comparing Transfer Efficiency of SprayApplied Coatings Under Laboratory Conditions1This standard is issued under the fixed designation D5009;the number immediately following the designation indicates the year oforiginal adopt
2、ion or,in 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 the evaluation and comparisonof the transfer efficiency
3、of spray-applied coatings undercontrolled laboratory conditions.1.2 This test method has been shown to yield excellentintralaboratory reproducibility.Interlaboratory precision ispoorer and is highly dependent on closely controlled air flow inthe spray booth,the rate at which the paint is delivered t
4、o thepart,and other variables suggested in the test method.1.3 Limitations:1.3.1 This laboratory procedure only indicates the directionof the effect of spray variables on transfer efficiency.Themagnitude of the effect is determined only by specific plantexperience.NOTE1This laboratory procedure requ
5、ires specific equipment andprocedures.For those laboratories that do not have access to the type ofequipment required a more general laboratory procedure is being preparedas Procedure B.1.4 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for inform
6、ationonly.1.5 This standard does not purport 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.For spec
7、ific hazardstatements,see Section 7 and 8.11.9 and 8.13.2.2.Referenced Documents2.1 ASTM Standards:2D1200 Test Method for Viscosity by Ford Viscosity CupD2369 Test Method for Volatile Content of CoatingsD3925 Practice for Sampling Liquid Paints and RelatedPigmented Coatings2.2 National Fire Protecti
8、on Association Documents3NFPA 33 Spray Application Using Flammable and Combus-tible MaterialsNFPA 86 Standard for Ovens and Furnaces3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 conveyor speed,nthe speed of the conveyor incentimeters per minute during the test.3.1.2 fluid mas
9、s flow rate,nthe mass flow rate of paint ingrams per minute during the test.3.1.3 mass of foil,nthe weight of each target foil in gramsbefore being painted.3.1.4 mass of foil plus paint solids,nthe weight of eachtarget foil in grams after being painted and baked.3.1.5 mass of paint solids,nthe diffe
10、rence in the mass ofthe foils before painting and the mass of the foils after paintingand baking.This is the sum of the mass of the foil plus paintsolids less the sum of the mass of the foil.3.1.6 transfer effciency,nthe ratio of the mass of the paintsolids deposited on the foil to the mass of the p
11、aint solidssprayed during the test expressed as a percent.3.1.7 weight percent solids,nthe solids content in percentof the total weight of a sample of the paint used during the test.4.Summary of Test Method4.1 Metal panels covered with preweighed aluminum foilare conveyed in a spraybooth past a fixe
12、d spraygun.The coatedfoils are then baked to remove volatile matter.The transferefficiency is calculated on a weight basis using the solidscontent and quantity of the paint sprayed and the amount ofsolids on the coated aluminum foil target.5.Significance and Use5.1 Subject to the limitations listed
13、above,the procedure canbe used as a research tool to optimize spray equipment and1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.55 on Factory Applied Coatings on Preformed P
14、roducts.Current edition approved June 1,2011.Published June 2011.Originallyapproved in 1996.Last previous edition approved in 2005 as D5009 02(2005).DOI:10.1520/D5009-02R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annua
15、l Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from National Fire Protection Association(NFPA),1 BatterymarchPark,Quincy,MA 02269-9101.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959
16、.United States1 paint formulations as well as to study the relative effect ontransfer efficiency of changing operating variables,sprayapplication equipment,and types of coatings.6.Apparatus6.1 Laboratory Scale,accurate to 60.001 g for weightpercent solids determination.6.2 Platform Scale,accurate,or equivalent,to 60.01 g formass of foil,mass of foil plus paint,and mass flow rateinstrumentation calibration.6.3 Mass Flow Rate Meter,or mass flow rate determinationmethod,accurate to 62%of the mass f
