1、Designation: D3794 16D3794 17Standard 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 indi
2、cates the 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 U.S. Department of Defense.1. Scope1.1 This guide covers procedures for testing coil coatings. The test methods in
3、cluded are listed in Table 1. Where more thanone test method is listed for the same characteristic, no attempt is made to indicate superiority of one method over another.Selection of test methods to be followed must be governed by the requirements in each individual case, together with agreementbetw
4、een the producer and user.1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this
5、standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use. Some specific hazards statements are given in Section 7 on Hazards.2. Referenced Documents2.1 ASTM Standards:2B117 Practice for Operating Salt Spray (Fog) ApparatusB36
6、8 Test Method for Copper-Accelerated Acetic Acid-Salt Spray (Fog) Testing (CASS Test)C1371 Test Method for Determination of Emittance of Materials Near Room Temperature Using Portable EmissometersC1549 Test Method for Determination of Solar Reflectance Near Ambient Temperature Using a Portable Solar
7、 ReflectometerD522 Test Methods for Mandrel Bend Test of Attached Organic CoatingsD523 Test Method for Specular GlossD610 Practice for Evaluating Degree of Rusting on Painted Steel SurfacesD660 Test Method for Evaluating Degree of Checking of Exterior PaintsD661 Test Method for Evaluating Degree of
8、Cracking of Exterior PaintsD714 Test Method for Evaluating Degree of Blistering of PaintsD822 Practice for Filtered Open-Flame Carbon-Arc Exposures of Paint and Related CoatingsD823 Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test PanelsD870 Practice
9、 for Testing Water Resistance of Coatings Using Water ImmersionD968 Test Methods for Abrasion Resistance of Organic Coatings by Falling AbrasiveD1005 Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using MicrometersD1014 Practice for Conducting Exterior Exposure Tests of Paints
10、 and Coatings on Metal SubstratesD1193 Specification for Reagent WaterD1200 Test Method for Viscosity by Ford Viscosity CupD1210 Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type GageD1212 Test Methods for Measurement of Wet Film Thickness of Organic CoatingsD1308 Test
11、 Method for Effect of Household Chemicals on Clear and Pigmented Organic FinishesD1474 Test Methods for Indentation Hardness of Organic CoatingsD1475 Test Method For Density of Liquid Coatings, Inks, and Related ProductsD1654 Test Method for Evaluation of Painted or Coated Specimens Subjected to Cor
12、rosive Environments1 This guide is under the jurisdiction ofASTM Committee D01 on Paint and Related Coatings, Materials, andApplications and is the direct responsibility of SubcommitteeD01.53 on Coil Coated Metal.Current edition approved July 1, 2016Feb. 1, 2017. Published July 2016February 2017. Or
13、iginally approved in 1979. Last previous edition approved in 20132016 asD3794 13.D3794 16. DOI: 10.1520/D3794-16.10.1520/D3794-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume informati
14、on, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict
15、 all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428
16、-2959. United States1D1729 Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque MaterialsD1735 Practice for Testing Water Resistance of Coatings Using Water Fog ApparatusD1823 Test Method for Apparent Viscosity of Plastisols and Organosols at High Shear Rates
17、 by Extrusion ViscometerD1824 Test Method for Apparent Viscosity of Plastisols and Organosols at Low 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
18、ViscometerD2197 Test Method for Adhesion of Organic Coatings by Scrape AdhesionD2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color CoordinatesD2247 Practice for Testing Water Resistance of Coatings in 100 % Relative HumidityD2248 Practice for D
19、etergent Resistance of Organic FinishesD2369 Test Method for Volatile Content of CoatingsD2454 Practice for Determining the Effect of Overbaking on Organic CoatingsD2697 Test Method for Volume Nonvolatile Matter in Clear or Pigmented CoatingsD2794 Test Method for Resistance of Organic Coatings to th
20、e Effects of Rapid Deformation (Impact)D2803 Guide for Testing Filiform Corrosion Resistance of Organic Coatings on MetalD3003 Test Method for Pressure Mottling and Blocking Resistance of Organic Coatings on Metal SubstratesD3134 Practice for Establishing Color and Gloss TolerancesD3170 Test Method
21、for Chipping Resistance of CoatingsD3278 Test Methods for Flash Point of Liquids by Small Scale Closed-Cup ApparatusD3359 Test Methods for Measuring Adhesion by Tape TestD3361 Practice for Unfiltered Open-Flame Carbon-Arc Exposures of Paint and Related CoatingsD3363 Test Method for Film Hardness by
22、Pencil TestD3960 Practice for Determining Volatile Organic Compound (VOC) Content of Paints and Related CoatingsD4060 Test Method for Abrasion Resistance of Organic Coatings by the Taber AbraserD4138 Practices for Measurement of Dry Film Thickness of Protective Coating Systems by Destructive, Cross-
23、SectioningMeansD4141 Practice for Conducting Black Box and Solar Concentrating Exposures of CoatingsD4145 Test Method for Coating Flexibility of Prepainted SheetD4146 Test Method for Formability of Zinc-Rich Primer/Chromate Complex Coatings on SteelD4147 Practice for Applying Coil Coatings Using The
24、 Wire-Wound Drawdown BarD4212 Test Method for Viscosity by Dip-Type Viscosity CupsD4214 Test Methods for Evaluating the Degree of Chalking of Exterior Paint FilmsD4287 Test Method for High-Shear Viscosity Using a Cone/Plate ViscometerD4518 Test Methods for Measuring Static Friction of Coating Surfac
25、es (Withdrawn 2000)3D4585 Practice for Testing Water Resistance of Coatings Using Controlled CondensationD4587 Practice for Fluorescent UV-Condensation Exposures of Paint and Related CoatingsD5031 Practice for Enclosed Carbon-Arc Exposure Tests of Paint and Related CoatingsD5178 Test Method for Mar
26、Resistance of Organic CoatingsD5402 Practice for Assessing the Solvent Resistance of Organic Coatings Using Solvent RubsD5531 Guide for Preparation, Maintenance, and Distribution of Physical Product Standards for Color and GeometricAppearance of CoatingsD5723 Practice for Determination of Chromium T
27、reatment Weight on Metal Substrates by X-Ray FluorescenceD5796 Test Method for Measurement of Dry Film Thickness of Thin-Film Coil-Coated Systems by Destructive Means Usinga Boring DeviceD5894 Practice for Cyclic Salt Fog/UV Exposure of Painted Metal, (Alternating Exposures in a Fog/Dry Cabinet and
28、aUV/Condensation Cabinet)D6093 Test Method for Percent Volume Nonvolatile Matter in Clear or Pigmented Coatings Using a Helium Gas PycnometerD6491 Practice for Evaluation of Aging Resistance of Prestressed Prepainted Metal In a Dry Heat TestD6492 Practice for Detection of Hexavalent Chromium On Zinc
29、 and Zinc/Aluminum Alloy Coated SteelD6578 Practice for Determination of Graffiti ResistanceD6665 Practice for Evaluation of Aging Resistance of Pre-stressed Prepainted Metal in a Boiling Water TestD6695 Practice for Xenon-Arc Exposures of Paint and Related CoatingsD6906 Test Method for Determinatio
30、n of Titanium Treatment Weight on Metal Substrates by Wavelength Dispersive X-RayFluorescenceD6944 Practice for Determining the Resistance of Cured Coatings to Thermal CyclingD7091 Practice for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to Ferrous Metals3 The la
31、st approved version of this historical standard is referenced on www.astm.org.D3794 172and Nonmagnetic, Nonconductive Coatings Applied to Non-Ferrous MetalsD7376 Practice for Outdoor Evaluation of Wet Stack Storage Conditions on Coil-Coated MetalsD7639 Test Method for Determination of ZirconiumTreat
32、mentWeight orThickness on Metal Substrates by X-Ray FluorescenceD7835 Test Method for Determining the Solvent Resistance of an Organic Coating using a Mechanical Rubbing MachineD7869 Practice for Xenon Arc Exposure Test with Enhanced Light and Water Exposure for Transportation CoatingsD7897 Practice
33、 for Laboratory Soiling and Weathering of Roofing Materials to Simulate Effects of Natural Exposure on SolarReflectance and Thermal EmittanceE70 Test Method for pH of Aqueous Solutions With the Glass ElectrodeE84 Test Method for Surface Burning Characteristics of Building MaterialsE284 Terminology o
34、f AppearanceE308 Practice for Computing the Colors of Objects by Using the CIE SystemE408 Test Methods for Total Normal Emittance of Surfaces Using Inspection-Meter TechniquesE643 Test Method for Ball Punch Deformation of Metallic Sheet MaterialE903 Test Method for Solar Absorptance, Reflectance, an
35、d Transmittance of Materials Using Integrating SpheresE1164 Practice for Obtaining Spectrometric Data for Object-Color EvaluationE1356 Test Method for Assignment of the Glass Transition Temperatures by Differential Scanning CalorimetryE1541 Practice for Specifying and Matching Color Using the Colorc
36、urve System (Withdrawn 2007)3E1545 Test Method for Assignment of the Glass Transition Temperature by Thermomechanical AnalysisE1640 Test Method for Assignment of the Glass Transition Temperature By Dynamic Mechanical AnalysisE1808 Guide for Designing and Conducting Visual ExperimentsE1918 Test Metho
37、d for Measuring Solar Reflectance of Horizontal and Low-Sloped Surfaces in the FieldE1980 Practice for Calculating Solar Reflectance Index of Horizontal and Low-Sloped Opaque SurfacesG7 Practice for Atmospheric Environmental Exposure Testing of Nonmetallic MaterialsG60 Practice for Conducting Cyclic
38、 Humidity ExposuresG85 Practice for Modified Salt Spray (Fog) TestingG87 Practice for Conducting Moist SO2 TestsG90 Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials Using Concentrated Natural SunlightG113 Terminology Relating to Natural and Artificial Weathering Tests
39、of Nonmetallic MaterialsG151 Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light SourcesG152 Practice for Operating Open Flame Carbon Arc Light Apparatus for Exposure of Nonmetallic MaterialsG153 Practice for Operating Enclosed Carbon Arc Light Apparatus
40、 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 for Exposure of Non-Metallic Materials3. Terminology3.1 Definitions:3.1.1 coil coating, napplicatio
41、n of coatings or films to continuous metal coil stock.3.1.2 direct roller coat, ncoating with the applicator or coating roll revolving in the same direction as the strip.3.1.3 metal pretreatment, nchemical treatment normally applied to the metal substrate prior to prime or finish coating.3.1.3.1 Dis
42、cussionThe treatment is designed to react with and modify the metal substrate to produce a surface suitable for coating or adhesivebonding.3.1.4 reverse roller coat, ncoating with the applicator or coating roll revolving in a direction opposite to that of the strip.3.2 The definitions given in Termi
43、nology G113 are applicable to this guide.4. Significance and Use4.1 This guide represents a collection of pertinent ASTM test methods used within the coil coatings industry. In the past coilcoaters world wide depended on industry standards written by the National Coil Coaters Association. That assoc
44、iation, workingcooperatively 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 6 25F) and 50 6 5 % relative humidity, immediately after baking unlessotherwise specified.6. Sampling6.1 The number of samples per un
45、it of production shall be agreed upon between the producer and user.D3794 173TABLE 1 List of Test Methods and Recommended PracticesSection ASTM StandardLiquid Coatings Properties: 7Viscosity: 7.1Ford cup viscosity 7.1.2 D1200Zahn cup viscosity 7.1.2 D4212High-Shear extrusion viscometer 7.1.3 D1823Pl
46、astisol 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 D3
47、960pH 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 D5723X-ray fluorescence, titanium determination 8.3.3 D6906X-ray fluorescence, zirconium determination 8.3.4 D7639Pane
48、l Preparation: 9Wire-wound drawdown bars 9.4.1.1 D4147Blade film applicator 9.4.1.2 D823Wet film thickness 9.5 D1212Material Properties of a Cured Coil Coating System: 10Dry film thickness (DFT) 10.1DFT, destructive methods 10.1.1DFT, micrometer 10.1.1.1 D1005DFT, microscope 10.1.1.2 D4138DFT, borin
49、g method 10.1.1.3 D5796DFT, non-destructive methods 10.1.2DFT, eddy current, non-ferrous base 10.1.2.1 D7091DFT, magnetic flux, ferrous base 10.1.2.2 D7091Color: 10.2Glossary of color 10.2.1 E284Preparation and control of color standards 10.2.1 D5531Color and gloss tolerances 10.2.1 D3134Conducting visual experiments 10.2.1 E1808Color differences by visual evaluation 10.2.2Visual evaluation of color and color difference 10.2.2.1 D1729Color differences by instrumental evaluation 10.2.3Color matching, color curve system 10.2.3 E1541CIE color difference 10.2.3 E308Obtainin
