1、Designation: D6294/D6294M 98 (Reapproved 2009)1D6294/D6294M 13Standard Test Method forCorrosion Resistance of Ferrous Metal Fastener AssembliesUsed in Roofing and Waterproofing1This standard is issued under the fixed designation D6294/D6294M; the number immediately following the designation indicate
2、s theyear of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1 NOTEEditorially corrected the units of measure in Decemb
3、er 2009.1. Scope1.1 This test method covers components of ferrous metal fastener assemblies, excluding those of stainless steel, such asfasteners, stress plates, and batten bars used in low slope roofing and waterproofing, to a sulfurous acid environment. This testmethod evaluates relative corrosion
4、 resistance of the components by determination of percentage of rust or white rust.1.2 The components may or may not have a surface treatment applied.1.3 A limiting factor is the subjectiveness when determining actual percentage of rust or white rust corrosion.1.4 Other performance characteristics o
5、f ferrous metal components such as abrasion resistance of barrier coatings are notevaluated in this method.1.5 This test method was developed based on Practice G87.1.6 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in eachsystem
6、may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the res
7、ponsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D16 Terminology for Paint, Related Coatings, Materials, and ApplicationsD1079 Terminology Rela
8、ting to Roofing and WaterproofingG15 Terminology Relating to Corrosion and Corrosion Testing (Withdrawn 2010)3G87 Practice for Conducting Moist SO2 Tests3. Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method, see Terminology D1079, G15, and D16.3.2 Definitions of Terms
9、 Specific to This Standard:3.2.1 barrierany material limiting passage through itself of solids, liquids, semi-solids, gases, vapors, or forms of energy suchas ultraviolet light.3.2.2 surface treatmenta process by which the surface of the ferrous metal component is treated with a barrier coating toin
10、hibit corrosion. Examples of barrier coatings for ferrous metal components include galvanization, zinc plating with or withoutyellow or clear chromate sealer, cadmium, mechanical zinc plating and organic or inorganic polymers.1 This test method is under the jurisdiction of ASTM Committee D08 on Roof
11、ing and Waterproofing and is the direct responsibility of Subcommittee D08.20 on RoofingMembrane Systems.Current edition approved Dec. 1, 2009May 1, 2013. Published December 2009June 2013. Originally approved in 1998. Last previous edition approved in 19982009 asD6294 98.D6294 98 (2009)E01. DOI: 10.
12、1520/D6294_D6294M-98R09E01.10.1520/D6294_D6294M-13.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 The last
13、 approved version of this historical standard is referenced on www.astm.org.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
14、 depict 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, P
15、A 19428-2959. United States14. Summary of Test Method4.1 This test method exposes ferrous metal specimens to 15 or 30 (24) h cycles consisting of the following:4.1.1 Eight (8) h exposure to the sulfur dioxide atmosphere in a closed chamber.4.1.2 An intermediate step of rinsing with distilled water,
16、and4.1.3 Sixteen (16) h of drying under vented conditions at controlled temperature and humidity.4.2 After drying, the test specimens are visually examined to evaluate the percentage of rust or white rust that formed on thesurface.4.3 The total surface area of the components exposed in the chamber i
17、s 0.5 6 0.1 m2 775 6 155 in.2.5. Significance and Use5.1 It is important to evaluate the corrosion resistance of ferrous metal components used in low-slope roofing and waterproofingbecause they provide integrity and securement of other system components, such as insulation and membranes. Corrosion o
18、fferrous metal components may result in their early deterioration and may lead to roofing or waterproofing system failure.5.2 Results from testing ferrous metal components in an acidic atmosphere serve as an indication of the relative corrosionresistance of such components, coated or uncoated, to th
19、e environment of the test chamber. The results are not to be construed asa general guideline to the corrosion resistance of such components in other environments or in usage that may be conducive tocorrosion.5.3 Moist air containing sulfur dioxide quickly produces easily visible corrosion on many fe
20、rrous metals. It is therefore a testmedium suited to detect pores or other sources of weakness in protective barrier coatings.5.4 This test method applies primarily to evaluating the effectiveness of barrier coatings to provide general corrosion protectionunder test conditions. It is not intended to
21、 evaluate the resistance of the components to specific corrosion mechanisms such ascrevice, galvanic, or stress corrosion.5.5 This test method does not address abrasion resistance of barrier coatings when the fasteners are driven through above roofdeck components, such as an existing built-up roof o
22、r insulations, or both.5.6 Only the above deck portion of fasteners subjected to this test method is evaluated.6. Apparatus6.1 The apparatus required for evaluating the corrosion resistance of the components consists of a test chamber4 having aninternal capacity of 300 L 10.6 ft3, a supply of sulfur
23、 dioxide with metering device, specimen supports, provisions for heatingthe chamber, and necessary means of control. The size and detailed construction of the apparatus shall be in accordance withSection 4 of Practice G87.7. Reagents7.1 The reagents, (that is, sulfur dioxide and water), their purity
24、, and the means for introducing the sulfur dioxide into the testchamber shall be in accordance with Section 7 of Practice G87.8. Test Specimen8.1 Select the number of test specimens such that the total combined exposed surface area of the specimens at any one time shallbe 0.5 6 0.1 m2 755 6 155 in.2
25、.8.2 It is allowable to mix the type of ferrous metal components (that is, fasteners, stress plates, an batten bars) in the testchamber, provided that the different components do not have vastly different resistance to corrosion under test conditions. Thedifferent types of components that may be eva
26、luated in the chamber simultaneously are to be agreed upon between the laboratoryand client requesting the test.NOTE 1The laboratory may have to conduct preliminary cycling tests to estimate the relative resistance of each component.NOTE 2Specimens may be produced by the laboratory showing 10, 15, 2
27、0, and 30 % rust or white rust surface corrosion to be used as controls toaid in the test result evaluation in accordance with 10.1.3 and 11.1.6.8.3 To obtain quantitative corrosion-rate data, only ferrous metal components with similar reactivities should be included in atest run.8.4 Roof Fastener T
28、est Specimens:4 The sole source of supply of the apparatus known to the committee at this time is Most Associates, 114 Waters Edge Drive. Jupiter, FL 33477, and Atotech USA, 20026Progress Drive, Strongville, OH 44136. If you are aware of alternative suppliers, please provide this information to ASTM
29、 International Headquarters. Your comments willreceive careful consideration at a meeting of the responsible technical committee,1 which you may attend.D6294/D6294M 1328.4.1 Fasteners of any length may be tested according to this method. The length is to be agreed upon between the laboratoryand clie
30、nt.8.4.2 Roof fasteners are evaluated in this method in relation to deck materials into which they are expected to be installed inservice. For purposes of this test method, these deck materials are structural concrete, lightweight insulating concrete, cementitiouswood fiber, gypsum, metal, and wood.
31、 Prepare the fastener test specimens as follows:8.4.3 Fasteners for Concrete Decks:8.4.3.1 Use nominal 20.7 MPa 3000 lb/in2 75 mm 3 in. minimum thickness concrete deck that has cured a minimum of 28days. Install the fastener, in accordance with the manufactures specifications, a minimum of 25 mm 1 i
32、n. 6 10 % into the deck.8.4.3.2 Use a separate hole location on the deck sample(s) for each fastener.8.4.4 Fasteners for Lightweight Insulating Concrete Decks:8.4.4.1 Use 75 mm 3 in. minimum thickness nominal 480 kg/m3 30 pcf lightweight insulating concrete deck that has cureda minimum 28 days. Inst
33、all the fastener, in accordance with the manufactures specifications, a minimum of 25 mm 1 in. 6 10 %into the deck.8.4.4.2 Use a separate hole location on the concrete deck sample(s) for each fastener.8.4.5 Fasteners for Cementitious Wood Fiber Decks:8.4.5.1 Use 75 mm 3 in. minimum thickness cementi
34、tious wood fiber deck. Install the fastener, in accordance withmanufactures specifications, a minimum of 25 mm 1 in. 6 10 % into the deck.8.4.5.2 Use a separate hole location on the deck sample(s) for each fastener.8.4.6 Fasteners for Gypsum Decks:8.4.6.1 Use 75 mm 3 in. minimum thickness poured gyp
35、sum deck that has cured a minimum of 28 days to a maximum 90days. Install the fastener, in accordance with the manufactures specifications, a minimum of 25 mm 1 in. 6 10 % into the deck.8.4.6.2 Use a separate hole location on the deck sample(s) for each fastener.8.4.7 For the decks referenced in 8.4
36、.3 through8.4.6 remove the fastener from the deck using care by breaking away the deckwithout damage to the section of the fastener not embedded in the deck.8.4.8 For 8.4.3 through 8.4.6 install the fastener in a pre-drilled plastic block such that the section previously driven into thedeck is not e
37、xposed. As an option and for non screw type fasteners, the fasteners may be hung from a glass rod with nylon wiretied to the glass rod and directly under the fastener head.8.4.9 Fasteners for Metal Decks:8.4.9.1 Use a nominal 75 by 75 mm 3 by 3 in. metal deck coupon5 having the following characteris
38、tics: 22 gage metal roofstock SS Grade E,80, painted, and cut edges are to be protected with paraffin wax, 2 mm 116 in. 6 10 % from the steel couponedges.8.4.9.2 Using a variable speed screw gun, drive a fastener a minimum of 13 mm 0.5 in.610 % to a maximum of 19 mm 0.75in. 6 10 % into the metal cou
39、pon. For non screw type fasteners, drive the fasteners in accordance with the manufacturesspecifications a minimum of 13 mm 0.5 in. 6 10 % to a maximum of 19 mm 0.75 in. 6 10 % into the metal coupon.8.4.10 Fasteners for Wood Decks:8.4.10.1 Use nominal 19 mm 0.75 in. exterior grade plywood. Using a v
40、ariable Speed screw gun, drive a fastener 25 mm 1in. 6 10 % into the plywood. For non screw type fasteners, drive fasteners in accordance with the manufactures specificationsa minimum of 13 mm 0.5 in. 6 10 % to a maximum of 25 m 1 in. 6 10 % into the deck.8.4.10.2 Remove the fastener from the plywoo
41、d by breaking away the plywood without damage to the section of the fastenernot embedded into the plywood.8.4.10.3 Install the fastener in a predrilled plastic block such that the section previously driven into the plywood is not exposed.As an option and for non screw type fasteners, the fasteners m
42、ay be hung from a glass rod with nylon wire tied to the glass rodand directly under the fastener head.8.5 Roof Stress Plate Test SpecimensStress plates shall be used as supplied.8.6 Roof Batten Bar Test SpecimensBatten-bar specimens shall be cut to a length of 150 6 2 mm 6 6 116 in.9. Position of Sp
43、ecimens During Test9.1 Place the test specimens in the cabinet so that no part of any specimen is within 20 6 2 mm 0.78 in. 6 10 % of another,or within 100 6 10 mm 3.9 in. 6 10 % of the walls or the ceiling, or within 200 6 20 mm 7.9 in. 6 10 % of the surface ofthe water in the base of the chamber.9
44、.2 Arrange the specimens so that moisture which may condense on any of them or their supports will not fall on the otherspecimens placed at lower levels.9.3 Unless otherwise agreed upon, the angle of inclination of test surfaces to the vertical is optional. However, a near verticalorientation (0 to
45、10 from the vertical) is suggested.5 The sole source of supply of the apparatus known to the committee at this time is Wheeling Corrugated, 1134 Market Street Wheeling, WV 26003. If you are awareof alternative suppliers, please provide this information toASTM International Headquarters.Your comments
46、 will receive careful consideration at a meeting of the responsibletechnical committee,1 which you may attend.D6294/D6294M 13310. Procedure10.1 The procedure shall be conducted according to Section 9 of Practice G87 with the following exceptions or additionalrequirements.10.1.1 Introduce 2 6 0.2 L 0
47、.5 gal 6 10 % of sulfur dioxide into the chamber through the inlet pipe.10.1.2 One test cycle is approximately 24 h of alternating exposure to the sulfur dioxide environment for 8 6 0.25 h, anintermediate step of rinsing (see 10.1.3) with a minimum of 1000 mL of clean distilled water at 30 6 8C 86 6
48、 14F, followedby drying in the ambient temperature inside the chamber for 16 6 0.25 h. For purpose of this test method ambient atmosphereis a temperature in the range of 20 to 30C 68 to 86F and a relative humidity below 75 % (6 10 %).10.1.3 Each individual component is rinsed by a gentle back and fo
49、rth motion while the component is immersed in the water.NOTE 3Rinsing for 15 to 30 s is intended to remove staining which is not part of corrosion.10.1.4 After rinsing and the test samples have been allowed to dry, visually estimate the percent of rust or white rust surfacecorrosion. As an aid, test samples may be compared to control specimens which may be produced by the laboratory showing 10,15, 20, 30 % rust or white rust surface corrosion.11. Report11.1 Report the following information:11.
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