Standard Test Method for Abrasion Resistance of Organic ...

1 Designation: D4060 10 Standard Test Method forAbrasion Resistance of Organic Coatings by the TaberAbraser1 This Standard is issued under the fixed designation D4060; 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 parentheses indicates the year of last reapproval. Asuperscript epsilon ( ) indicates an editorial change since the last revision or Standard has been approved for use by agencies of the Department of Scope* This test Method covers the determination of the resis-tance of Organic coatings to Abrasion produced by the TaberAbraser on coatings applied to a plane, rigid surface, such as ametal The values stated in SI units are to be regarded as thestandard, with the exception of mils when determining coatingthickness. The values given in parentheses are for This Standard is similar in content (but not technicallyequivalent) toISO 7784 Standard does not purport to address all of thesafety concerns, if any, associated with its use.

2 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 Referenced standards :2D823 Practices for Producing Films of Uniform Thicknessof Paint, Varnish, and Related Products on Test PanelsD968 Test methods for Abrasion Resistance of OrganicCoatings by Falling AbrasiveD1005 Test Method for Measurement of Dry-Film Thick-ness of Organic Coatings Using MicrometersD2240 Test Method for Rubber Property DurometerHardnessD3924 Specification for Environment for Conditioning andTesting Paint, Varnish, Lacquer, and Related MaterialsD7091 Practice for Nondestructive Measurement of DryFilm Thickness of Nonmagnetic Coatings Applied toFerrous Metals and Nonmagnetic, Nonconductive Coat-ings Applied to Non-Ferrous standards :ISO 7784 2 Paints and varnishes Determination of resis-tance to Abrasion Part 2: Rotating abrasive rubber wheelmethod33.

3 Of Terms Specific to This Abrasion Resistance can be expressed as one or moreof the following index,n 1000 times the loss in weight inmilligrams per loss,n the loss in weight in milligrams,determined at a specified number of cycles per mil,n the number of cycles ofabrasion required to wear a film through to the substrate per milof film Summary of Test The Organic coating is applied at uniform thickness to aplane, rigid panel and, after curing, the surface is abraded byrotating the panel under weighted abrasive Abrasion Resistance is calculated as loss in weight at aspecified number of Abrasion cycles, as loss in weight percycle, or as number of cycles required to remove a unit amountof coating Significance and Coating on substrates can be damaged by abrasionduring manufacturing and service. This test Method has beenuseful in evaluating the Abrasion Resistance of attached coat-ings.

4 Ratings produced by this test Method have correlated wellwith ratings produced by the falling abrasive values in For some materials, Abrasion tests utilizing the TaberAbraser may be subject to variation due to changes in theabrasive characteristics of the wheel during testing. Dependingon abradant type and test specimen, the wheel surface maychange (that is, become clogged) due to the pick-up of coating1 This test Method is under the jurisdiction of ASTM CommitteeD01on Paintand Related Coatings, Materials, and Applications and is the direct responsibility Physical Properties of Applied Paint edition approved Feb. 1, 2010. Published February 2010. Originallyapproved in 1981. Last previous edition approved in 2007 as D4060 07. referenced ASTM standards , visit the ASTM website, , orcontact ASTM Customer Service at ForAnnual Book of ASTMS tandardsvolume information, refer to the Standard s Document Summary page onthe ASTM from American National standards Institute (ANSI), 25 W.

5 43rd St.,4th Floor, New York, NY 10036, *A Summary of Changes section appears at the end of this ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United ASTM International Provided by IHS under license with ASTM Sold to:NW PA Reg Plann and Dev Co, 560087 Not for Resale,12/13/2010 12:35:50 MSTNo reproduction or networking permitted without license from IHS--`````````````,,,,`,```,,`,``-`-`,,` ,,`,`,,`---or other materials from test specimens and must be refaced atmore frequent intervals as agreed upon by the interestedparties. To determine if more frequent refacing is required, plotthe total weight loss every 50 cycles. If a significant negativechange in slope is observed prior to 500 cycles, the point atwhich the slope changes determines the refacing Abraser,4consisting of the following A horizontal turntable platform; comprised of a rubberpad, clamp plate, and nut to secure the specimen to theturntable, A motor capable of rotating the turntable platform at aspeed of either 7262 r/min for 110v/60Hz or 6062 r/min for230v/50Hz, A pair of pivoted arms, to which the abrasive wheelsand auxiliary masses may be attached; loads of 250, 500, or1000 g on each wheel may be obtained by use of thesechangeable masses.

6 Counterweight attachments of 125 or 175g are available to reduce the load against the specimen, and canbe used with or without the auxiliary masses,NOTE1 Without auxiliary masses or counterweights, each arm willapply a load against the specimen of 250 g per wheel (exclusive of themass of the wheel itself). A vacuum suction system and vacuum pick-up nozzleto remove debris and abrasive particles from the specimensurface during testing. The height of the vacuum pickup nozzleshall be adjustable, and the nozzle openings shall be 8 mm (5 16in.) in diameter. The vacuum system shall operate when A counter to record the number of cycles (revolutions)made by the turntable Wheels Resilient Calibrase wheels or CS-17, as required, shall be used unless otherwiseagreed upon by the interested parties. Because of the slowhardening of the bonding material resilient wheels should notbe used after the date marked on them, or one year after theirpurchase if the wheels are not The wheels shall be mm thick and have anexternal diameter of mm when new, and in no caseless than The hardness of the wheels can be checked by Test MethodD2240.

7 Measure at least four points equally spaced on the side surface ofthe wheel. The reading shall be taken 10 s after full application of thepressure, and then averaged. An acceptable hardness for both types ofwheels is 8165 units on Shore Durometer A-2 The CS-17 wheels produce a harsher Abrasion than the Medium, an S-11 abrasive disk, used forresurfacing the Abrasion Test Apply a uniform coating of the material to be tested toa rigid panel having both surfaces substantially plane andparallel. Specimens shall be a disk or a square plate with a (1 4in.) hole centrally located on each panel. Typicaldimensions for a test panel are 100 mm in diameter or 100 by100 mm. Thickness of the specimen should be no greater mm (1 4in.) unless an S-21 extension nut4or arm heightextension kit4is utilized. Prepare a minimum of two coatedpanels for the The coatings should be applied in accordance with PracticesD823, or as agreed upon between the interested The thickness of the dry coatings should be measured inaccordance with Test MethodD1005or For those materials greater than mm (1 4in.)

8 But less mm (1 2in.) thick, the S-21 extension nut may be used to affix thespecimen to the turntable. This requires a mm (3 8in.) center hole in thespecimen. Alternatively, an arm height extension kit will permit testing ofspecimens up to 40 mm (11 2in.) thick and requires the center hole to mm (9 16in.).8. Verify calibration of the Taber Abraser as directed by theequipment manufacturer (seeAppendix X1).9. To ensure that the abrading function of the wheels ismaintained at a constant level, prepare the abrading wheelsprior to each Mount the selected abrasive wheels on their respectiveflange holders, taking care not to handle them by their A load of 1000 g (per wheel) should be used, unlessotherwise agreed upon by the interested Mount the resurfacing medium (S-11 abrasive disk) onthe turntable. Lower the abrading heads carefully until thewheels rest squarely on the abrasive disk.

9 Place the vacuumpick up nozzle in position and adjust it to a distance of mm(1 4in.), or as agreed upon between buyer and seller, above theabrasive Set the counter to zero and set the vacuum suctionforce to 100. The vacuum suction force may be decreased ifagreed upon by the interested Resurface the wheels by running them 50 cyclesagainst the resurfacing Do not brush ortouch the surface of the wheels after they are The wheels shall be resurfaced in this manner before testingeach specimen and after every 500 Cure the coated panel under conditions of humidityand temperature as agreed upon between the interested additional information, reference Unless otherwise agreed upon between the interestedparties, condition the coated panel for at least 24 h at 2362 C( F) and 5065 % relative humidity. Conduct thetest in the same environment or immediately on Weigh the test specimen to the nearest mg andrecord this weight, if either the wear index or the weight lossis to be from Taber Industries, 455 Bryant St.

10 , North Tonawanda, NY 102 Copyright ASTM International Provided by IHS under license with ASTM Sold to:NW PA Reg Plann and Dev Co, 560087 Not for Resale,12/13/2010 12:35:50 MSTNo reproduction or networking permitted without license from IHS--`````````````,,,,`,```,,`,``-`-`,,` ,,`,`,,` When wear cycles per mil is required, measure thecoating thickness of the test specimen on four points along thepath to be abraded and take the average of the Mount the test specimen on the abraser turntableplatform with the side to be abraded facing up. Secure usingthe clamp plate and nut. Place the abrading heads on the testspecimen and the vacuum pick-up nozzle in position asoutlined Affix the auxiliary masses as outlined Set the counter and vacuum suction as outlined To generate a uniform wear pattern, specimen surfaces mustbe plane and parallel. If a sample is slightly warped, the model E140-14 Rimmed Specimen Holder with Ring Clamp4or similar may be used.