1、Designation:D618997(Reapproved 2014)Standard Practice forEvaluating the Efficiency of Chemical Removers for OrganicCoatings1This standard is issued under the fixed designation D6189;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、 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 The practice evaluates the effectiveness of coatingsremovers used on clear or pigmented coatings as applied towood
3、 and metal.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 the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish app
4、ropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D609 Practice for Preparation of Cold-Rolled Steel Panelsfor Testing Paint,Varnish,Conversion Coatings,andRelated Coating ProductsD823 Practices for Pro
5、ducing Films of Uniform Thicknessof Paint,Varnish,and Related Products on Test PanelsD3924 Specification for Environment for Conditioning andTesting Paint,Varnish,Lacquer,and Related MaterialsE145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.Terminology3.1 Definitions of Terms
6、Specific to This Standard:3.1.1 coatings remover,na product that is formulated forthe removal of paint,varnish,lacquer,shellac,or polyurethanetop coats,or related coatings,or both.4.Summary of Practice4.1 Test panels are coated and force dried.The coatingsremover is applied with a brush and the loos
7、ened coating islifted with a plastic scraper after a specified time.Coatingsremoval efficiency is determined and recorded using a ratingscheme of 5 to 0.5.Significance and Use5.1 Old coatings,such as paint or related coatings,may haveto be removed from a surface before successful recoating canoccur.
8、This practice can be used to test the coatings removalefficiency of products designed for such use.6.Apparatus6.1 Forced Draft Oven,Type IB,in accordance with Speci-fication E145.6.2 Paint Brush,containing nylon/polyester bristles.6.3 Plastic Paint Scraper.6.4 Very Fine Garnet Abrasive-Type Sandpape
9、r,240 to 220grade.6.5 Stopwatch.7.Testing Materials7.1 Finishedis recommended to test coatings removers ona variety of finishes such as latex enamel,alkyd enamel,polyurethane,varnish,shellac and nitrocellulose lacquer,or asagreed upon between the purchaser and the seller.7.2 Wood test panels of soli
10、d wood or wood laminate suchas birch plywood,fir,pine,oak or walnut.Smooth sawn panelsof dimensions not less than 300 by 300 mm(12 by 12 in.)and8-mm(516-in.)thick.7.3 Steel test panels with dimensions of 150 by 300 mm(6by 12 in.)and 0.8-mm(0.032-in.)thick.8.Panel Preparation8.1 Wood Panel Preparatio
11、nStore the wood panels for aleast 6 days under standard conditions as specified in Specifi-cation D3924.8.2 Sand the panels lightly with sandpaper as defined in 6.4and wipe them clean of debris.1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and
12、Applications and is the direct responsibility ofSubcommittee D01.42 on Architectural Coatings.Current edition approved June 15,2014.Published June 2014.Originallyapproved in 1997.Last previous edition approved in 2008 as D6189 97(2008).DOI:10.1520/D6189-97R14.2For referenced ASTM standards,visit the
13、 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United Stat
14、es1 8.3 Coat one side of a panel with a test coating by anymethod specified in Practices D823 to ensure uniform filmthickness,using the manufacturers recommended coveragerate.Allow the coating to dry overnight under standardconditions as specified in Specification D3924.8.4 Apply a second coat of th
15、e same type of coating of adifferent color(if pigmented)using the same method.Forcedry at 50C(120F)overnight.Allow the panel to cool toambient temperature.8.5 Apply and dry a third coat of the same type of coatingas in 8.4.NOTE1Apply clear finishes in two coats following the manufacturersrecommended
16、 application instructions under the same drying conditionsdescribed in 8.3 and 8.4.8.6 Metal PreparationClean the metal panels as describedin Procedure D,Practice D609 until panels are free fromdebris,oily film,and corrosion.8.7 Apply three coats of the test finish as directed in 8.3,8.4,and 8.5.9.Procedure9.1 Apply coatings remover in accordance with the manu-facturers instructions,using a solvent-resistant brush unlessotherwise directed by the manufacturer.Stroke the surface inone direction on
