1、Designation: D3794 13Standard Guide forTesting Coil Coatings1This standard is issued under the fixed designation D3794; 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 th
2、e year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This guide covers procedures for testing coil coatings.The test methods included are lis
3、ted in Table 1. Where morethan one test method is listed for the same characteristic, noattempt is made to indicate superiority of one method overanother. Selection of test methods to be followed must begoverned by the requirements in each individual case, togetherwith agreement between the producer
4、 and user.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 purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establi
5、sh appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use. Some specifichazards statements are given in Section 7 on Hazards.2. Referenced Documents2.1 ASTM Standards:2B177 Guide for Engineering Chromium ElectroplatingB368 Test Method for Cop
6、per-Accelerated Acetic Acid-SaltSpray (Fog) Testing (CASS Test)C1371 Test Method for Determination of Emittance ofMaterials Near Room Temperature Using Portable Emis-sometersC1549 Test Method for Determination of Solar ReflectanceNear Ambient Temperature Using a Portable Solar Reflec-tometerD522 Tes
7、t Methods for Mandrel Bend Test of AttachedOrganic CoatingsD523 Test Method for Specular GlossD610 Practice for Evaluating Degree of Rusting on PaintedSteel SurfacesD660 Test Method for Evaluating Degree of Checking ofExterior PaintsD661 Test Method for Evaluating Degree of Cracking ofExterior Paint
8、sD714 Test Method for Evaluating Degree of Blistering ofPaintsD822 Practice for Filtered Open-Flame Carbon-Arc Expo-sures of Paint and Related CoatingsD823 Practices for Producing Films of Uniform Thicknessof Paint, Varnish, and Related Products on Test PanelsD870 Practice for Testing Water Resistan
9、ce of CoatingsUsing Water ImmersionD968 Test Methods for Abrasion Resistance of OrganicCoatings by Falling AbrasiveD1005 Test Method for Measurement of Dry-Film Thick-ness of Organic Coatings Using MicrometersD1014 Practice for Conducting Exterior Exposure Tests ofPaints and Coatings on Metal Substr
10、atesD1186 Test Methods for Nondestructive Measurement ofDry Film Thickness of Nonmagnetic Coatings Applied toa Ferrous Base (Withdrawn 2006)3D1193 Specification for Reagent WaterD1200 Test Method for Viscosity by Ford Viscosity CupD1210 Test Method for Fineness of Dispersion of Pigment-Vehicle Syste
11、ms by Hegman-Type GageD1212 Test Methods for Measurement of Wet Film Thick-ness of Organic CoatingsD1308 Test Method for Effect of Household Chemicals onClear and Pigmented Organic FinishesD1400 Test Method for Nondestructive Measurement of DryFilm Thickness of Nonconductive Coatings Applied to aNon
12、ferrous Metal Base (Withdrawn 2006)3D1474 Test Methods for Indentation Hardness of OrganicCoatingsD1475 Test Method For Density of Liquid Coatings, Inks,and Related ProductsD1654 Test Method for Evaluation of Painted or Coated1This guide is under the jurisdiction of ASTM Committee D01 on Paint andRe
13、lated Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.53 on Coil Coated Metal.Current edition approved March 15, 2013. Published May 2013. Originallyapproved in 1979. Last previous edition approved in 2000 as D3794 00 which waswithdrawn March 2009 and reinst
14、ated in March 2013. DOI: 10.1520/D3794-13.2For referenced ASTM standards, visit the 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.3The last approved
15、version of this historical standard is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1Specimens Subjected to Corrosive EnvironmentsD1729 Practice for Visual Appraisal of Colors and ColorDifferences of Diffus
16、ely-Illuminated Opaque MaterialsD1735 Practice for Testing Water Resistance of CoatingsUsing Water Fog ApparatusD1823 Test Method for Apparent Viscosity of Plastisols andOrganosols at High Shear Rates by Extrusion ViscometerD1824 Test Method for Apparent Viscosity of Plastisols andOrganosols at Low
17、Shear RatesD2092 Guide for Preparation of Zinc-Coated (Galvanized)Steel Surfaces for Painting (Withdrawn 2008)3D2196 Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational (Brookfield type)ViscometerD2197 Test Method for Adhesion of Organic Coatings byScrape AdhesionD2244 P
18、ractice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesD2247 Practice for Testing Water Resistance of Coatings in100 % Relative HumidityD2248 Practice for Detergent Resistance of Organic FinishesD2369 Test Method for Volatile Content of Coatings
19、D2454 Practice for Determining the Effect of Overbaking onOrganic CoatingsD2697 Test Method for Volume Nonvolatile Matter in Clearor Pigmented CoatingsD2794 Test Method for Resistance of Organic Coatings tothe Effects of Rapid Deformation (Impact)D2803 Guide for Testing Filiform Corrosion Resistance
20、 ofOrganic Coatings on MetalD3003 Test Method for Pressure Mottling and BlockingResistance of Organic Coatings on Metal SubstratesD3134 Practice for Establishing Color and Gloss TolerancesD3170 Test Method for Chipping Resistance of CoatingsD3278 Test Methods for Flash Point of Liquids by SmallScale
21、 Closed-Cup ApparatusD3359 Test Methods for Measuring Adhesion by Tape TestD3361 Practice for Unfiltered Open-Flame Carbon-Arc Ex-posures of Paint and Related CoatingsD3363 Test Method for Film Hardness by Pencil TestD3960 Practice for Determining Volatile Organic Compound(VOC) Content of Paints and
22、 Related CoatingsD4060 Test Method for Abrasion Resistance of OrganicCoatings by the Taber AbraserD4138 Practices for Measurement of Dry Film Thickness ofProtective Coating Systems by Destructive, Cross-Sectioning MeansD4141 Practice for Conducting Black Box and Solar Con-centrating Exposures of Coa
23、tingsD4145 Test Method for Coating Flexibility of PrepaintedSheetD4146 Test Method for Formability of Zinc-Rich Primer/Chromate Complex Coatings on SteelD4147 Practice for Applying Coil Coatings Using TheWire-Wound Drawdown BarD4212 Test Method for Viscosity by Dip-Type ViscosityCupsD4214 Test Metho
24、ds for Evaluating the Degree of Chalkingof Exterior Paint FilmsD4287 Test Method for High-Shear Viscosity Using a Cone/Plate ViscometerD4518 Test Methods for Measuring Static Friction of Coat-ing Surfaces (Withdrawn 2000)3D4585 Practice for Testing Water Resistance of CoatingsUsing Controlled Conden
25、sationD4587 Practice for Fluorescent UV-Condensation Expo-sures of Paint and Related CoatingsD5031 Practice for Enclosed Carbon-Arc Exposure Tests ofPaint and Related CoatingsD5178 Test Method for Mar Resistance of Organic CoatingsD5402 Practice for Assessing the Solvent Resistance ofOrganic Coating
26、s Using Solvent RubsD5531 Guide for Preparation, Maintenance, and Distributionof Physical Product Standards for Color and GeometricAppearance of CoatingsD5723 Practice for Determination of Chromium TreatmentWeight on Metal Substrates by X-Ray FluorescenceD5796 Test Method for Measurement of Dry Film
27、 Thicknessof Thin-Film Coil-Coated Systems by Destructive MeansUsing a Boring DeviceD5894 Practice for Cyclic Salt Fog/UV Exposure of PaintedMetal, (Alternating Exposures in a Fog/Dry Cabinet and aUV/Condensation Cabinet)D6093 Test Method for Percent Volume Nonvolatile Matterin Clear or Pigmented Co
28、atings Using a Helium GasPycnometerD6491 Practice for Evaluation of Aging Resistance of Pre-stressed Prepainted Metal In a Dry Heat TestD6492 Practice for Detection of Hexavalent Chromium OnZinc and Zinc/Aluminum Alloy Coated SteelD6906 Test Method for Determination of Titanium Treat-ment Weight on
29、Metal Substrates by Wavelength Disper-sive X-Ray FluorescenceD7376 Practice for Outdoor Evaluation of Wet Stack StorageConditions on Coil-Coated MetalsD7639 Test Method for Determination of Zirconium Treat-ment Weight or Thickness on Metal Substrates by X-RayFluorescenceE70 Test Method for pH of Aqu
30、eous Solutions With theGlass ElectrodeE84 Test Method for Surface Burning Characteristics ofBuilding MaterialsE284 Terminology of AppearanceE308 Practice for Computing the Colors of Objects by Usingthe CIE SystemE408 Test Methods for Total Normal Emittance of SurfacesUsing Inspection-Meter Technique
31、sE643 Test Method for Ball Punch Deformation of MetallicSheet MaterialE903 Test Method for Solar Absorptance, Reflectance, andTransmittance of Materials Using Integrating SpheresE1164 Practice for Obtaining Spectrometric Data for Object-Color EvaluationE1356 Test Method for Assignment of the Glass T
32、ransitionTemperatures by Differential Scanning CalorimetryD3794 132E1541 Practice for Specifying and Matching Color Usingthe Colorcurve System (Withdrawn 2007)3E1545 Test Method for Assignment of the Glass TransitionTemperature by Thermomechanical AnalysisE1640 Test Method for Assignment of the Glas
33、s TransitionTemperature By Dynamic Mechanical AnalysisE1808 Guide for Designing and Conducting Visual Experi-mentsE1918 Test Method for Measuring Solar Reflectance ofHorizontal and Low-Sloped Surfaces in the FieldG7 Practice for Atmospheric Environmental Exposure Test-ing of Nonmetallic MaterialsG60
34、 Practice for Conducting Cyclic Humidity ExposuresG85 Practice for Modified Salt Spray (Fog) TestingG87 Practice for Conducting Moist SO2TestsG90 Practice for Performing Accelerated Outdoor Weather-ing of Nonmetallic Materials Using Concentrated NaturalSunlightG113 Terminology Relating to Natural an
35、d Artificial Weath-ering Tests of Nonmetallic MaterialsG151 Practice for Exposing Nonmetallic Materials in Accel-erated Test Devices that Use Laboratory Light SourcesG152 Practice for Operating Open Flame Carbon Arc LightApparatus for Exposure of Nonmetallic MaterialsG153 Practice for Operating Encl
36、osed Carbon Arc LightApparatus for Exposure of Nonmetallic MaterialsG154 Practice for Operating Fluorescent Ultraviolet (UV)Lamp Apparatus for Exposure of Nonmetallic MaterialsG155 Practice for Operating Xenon Arc Light Apparatus forExposure of Non-Metallic Materials3. Terminology3.1 Definitions:3.1
37、.1 coil coating, napplication of coatings or films tocontinuous metal coil stock.3.1.2 direct roller coat, ncoating with the applicator orcoating roll revolving in the same direction as the strip.3.1.3 metal pretreatment, nchemical treatment normallyapplied to the metal substrate prior to prime or f
38、inish coating.3.1.3.1 DiscussionThe treatment is designed to react withand modify the metal substrate to produce a surface suitable forcoating or adhesive bonding.3.1.4 reverse roller coat, ncoating with the applicator orcoating roll revolving in a direction opposite to that of the strip.3.2 The def
39、initions given in Terminology G113 are appli-cable to this guide.4. Significance and Use4.1 This guide represents a collection of pertinent ASTMtest methods used within the coil coatings industry. In the pastcoil coaters world wide depended on industry standards writtenby the National Coil Coaters A
40、ssociation. That association,working cooperatively with ASTM, will no longer issue new,nor update old, standards.5. General Requirements5.1 All standard tests shall be made at 25 6 3C (77 625F) and 50 6 5 % relative humidity, immediately afterbaking unless otherwise specified.6. Sampling6.1 The numb
41、er of samples per unit of production shall beagreed upon between the producer and user.7. Liquid Coating Properties7.1 Viscosity:7.1.1 It is common to measure the viscosity of coil coatingsusing an efflux technique (Ford or Zahn cup). This provides asimple, rapid technique for controlling the viscos
42、ity of aproduct, either in a paint production facility, or on-line at a coilcoating facility. Coatings in the coil industry, however, cover awide range of generic qualities, with many of them havingnon-Newtonian rheological characteristics. It is important,therefore, to consider the behavior of thes
43、e coatings underdifferent shear conditions, as well as measuring efflux viscos-ity. Some of the test methods require little expertise, whereother test methods involve costly equipment and a high level ofexperience to run and interpret the rheological data.7.1.2 Efflux ViscosityDetermine efflux visco
44、sity in accor-dance with Test Method D4212 (Zahn cup) or D1200 (Fordcup).7.1.3 High-Shear Extrusion ViscosityDetermine the high-shear extrusion viscosity for plastisols and organosols inaccordance with Test Method D1823.7.1.4 Low-Shear Viscosity for Plastisols and OrganosolsTest in accordance with T
45、est Method D1824.7.1.5 Brookfield-type ViscosityDetermine the Brookfieldviscosity with a rotational viscometer in accordance with TestMethod D2196.7.1.6 Cone and Plate ViscometerDetermine the viscosityusing a cone and plate viscometer in accordance with TestMethod D4287.7.2 Weight SolidsDetermine th
46、e level of nonvolatile massin accordance with Test Method D2369.7.3 Volume SolidsDetermine the level of nonvolatile vol-ume in accordance with Test Method D2697 or D6093.7.4 Fineness of DispersionDetermine the fineness ofgrind of a coating in accordance with Test Method D1210.7.5 DensityDetermine th
47、e density (weight per gallon) inaccordance with Test Method D1475.7.6 VOCDetermine the VOC (volatile organic compo-nent) content in accordance with Practice D3960.7.7 pHControlling the level of acidity or alkalinity (pH) inthe pretreatment section of a coil line, as well as that ofwaterborne coating
48、s, is important. Determine pH in accordancewith Test Method E70.7.8 Flash PointTest the flash point of a coating in accor-dance with Test Methods D3278.D3794 133TABLE 1 List of Test Methods and Recommended PracticesSection ASTM StandardLiquid Coatings Properties: 7Viscosity: 7.1Ford cup viscosity 7.
49、1.2 D1200Zahn cup viscosity 7.1.2 D4212High-Shear extrusion viscometer 7.1.3 D1823Plastisol and organosol low-shear viscosity 7.1.4 D1824Brookfield-type viscometer 7.1.5 D2196Cone and Plate viscometer 7.1.6 D4287Weight Solids 7.2 D2369Volatile Content 7.2 D2369Volume Solids 7.3 D2697, D6093Fineness of dispersion 7.4 D1210Density (weight per gallon) 7.5 D1475VOC Determination 7.6 D3960pH 7.7 E70Flash Point 7.8 D3278Metal Pretreatment: 8Preparation of galvanized steel for painting 8.2 D2092Detecting Cr+6 8.3.1 D6492X-ray fluorescence, chrome determination 8.3.2 D5
