1、Designation: D 5367 08Standard Practice forEvaluating Coatings Applied Over Surfaces Treated WithInhibitors Used to Prevent Flash Rusting of Steel WhenWater or Water/Abrasive Blasted1This standard is issued under the fixed designation D 5367; the number immediately following the designation indicate
2、s 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers procedures to evaluate t
3、he compat-ibility of coatings with inhibitors used to prevent flash rustingof steel before application of coatings.1.2 The inhibitors are used with water-blast cleaning surfacepreparation and may be used with or without abrasives.1.3 The manufacturer of the coatings shall be consulted toensure compa
4、tibility of inhibitors with the coatings.1.4 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 establish appro-priate safety and health practices and determine the applica-bility of regulatory
5、 limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2A 36/A 36M Specification for Carbon Structural SteelB117 Practice for Operating Salt Spray (Fog) ApparatusD 714 Test Method for Evaluating Degree of Blistering ofPaintsD 822 Practice for Filtered Open-Flame Carbon-Arc Expo-sures of
6、 Paint and Related CoatingsD 1193 Specification for Reagent WaterD 1654 Test Method for Evaluation of Painted or CoatedSpecimens Subjected to Corrosive EnvironmentsD 2247 Practice for Testing Water Resistance of Coatings in100 % Relative HumidityD 3359 Test Methods for Measuring Adhesion by Tape Tes
7、tD 4417 Test Methods for Field Measurement of SurfaceProfile of Blast Cleaned SteelD 4541 Test Method for Pull-Off Strength of CoatingsUsing Portable Adhesion Testers2.2 Other Standards:SSPC-SP 5 Surface Preparation Specification No. 5, WhiteMetal Blast Cleaning3SSPC-SP12/NACE No. 5 Surface Preparat
8、ion and Cleaningof Steel and Other Hard Materials by High and Ultrahigh-Pressure Water Jetting Prior to Recoating3SSPC-TR2/NACE 6C 198 Wet Abrasive Blast Cleaning3NACE TM-01-74 Laboratory Method for Evaluation ofProtective Coatings Used as Lining Materials in Immer-sion Surfaces43. Significance and
9、Use3.1 Water-blast cleaning with, (SSPC-TR2/NACE 6C 198)or without, (SSPC-SP 12/NACE No. 5) abrasive, results inflash rusting under some environmental conditions. Inhibitorsare used to prevent flash rusting while drying and beforecoating application. The inhibitor or reaction products of theinhibito
10、r on the substrate becomes part of the coating systems.Coating performance may be influenced by the inhibitor.Soluble contaminants or unreacted inhibitors left on the surfaceunder the coating may cause premature failure. This practiceincludes a comparison of coating performance with and with-out inh
11、ibitors using various laboratory tests to simulate a rangeof conditions such as high moisture, marine atmospheric orwater immersion.3.2 The user or specifier must determine the specific testmethods to be used and exposure conditions. Some testmethods referenced may not be applicable to all types ofc
12、oatings.4. Specimen Preparation4.1 Carbon steel samples of an appropriate size, in accor-dance with Specification A 36/A 36M for the specified testmethod shall be white metal blast-cleaned in accordance withSSPC-SP 5 and measure profile in accordance with TestMethods D 4417. Select an abrasive that
13、is suitable for use with1This practice is under the jurisdiction of ASTM Committee D33 on ProtectiveCoating and Lining Work for Power Generation Facilities and is the directresponsibility of Subcommittee D33.05 on Application and Surface Preparation.Current edition approved Jan. 1, 2008. Published J
14、anuary 2008. Originallyapproved in 1994. Last previous edition approved in 2000 as D 5367 00.2For 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
15、Summary page onthe ASTM website.3Available from Society for Protective Coatings (SSPC), 40 24th St., 6th Floor,Pittsburgh, PA 15222-4656, http:/www.sspc.org.4Available from National Association of Corrosion Engineers (NACE), 1440South Creek Dr., Houston, TX 77084-4906, http:/www.nace.org.1Copyright
16、ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.water-blast applications. Control panels shall be coated withthe same coating system and dry film thickness as the inhibitor-treated panels with the topcoat time as follows:Number of Panels for Ea
17、ch Exposure TestATopcoat Time68 h 4856 hDry Blastedno inhibitor 2 2Dry Blastedinhibitor-recommended concentra-tion22Dry Blastedinhibitor-recommended concentra-tion 3 522_AFor each of the test and topcoat times, one panel shall be designated ascontrol and shall receive no exposure.4.2 Test panels wil
18、l be treated with the inhibitor by immers-ing the dry abrasive-blasted panel in a water solution, at 75 610F (24 6 5.5C), of the inhibitor at the concentrationrecommended by the inhibitor manufacturer and at five timesthis concentration (five times to simulate excessive concentra-tion above that rec
19、ommended by the inhibitor manufacturer).Use deionized water in accordance with Specification D 1193.Deionized water, Type II Reagent Grade, is used to minimizetest variables. Tap water is typically used in the field and maycontain varying amounts of salts.4.3 Remove panel after 1 or 2 min immersion
20、in theinhibitor solution and hang in a vertical position allowing theinhibited water solution to drain and dry at 75 6 10F (24 65.5C). If required by the inhibitor manufacturer, rinse panelswith deionized water to remove excess inhibitor or in accor-dance with the manufacturers recommendations (see
21、alsoSpecification D 1193). Care should be taken not to allow thewater/inhibitor solutions to puddle since this may cause a highconcentration of inhibitor, after evaporation.4.4 After completely drying and prior to any appearance offlash rusting, apply the first coat of the coating system. Applycoati
22、ng within 6 to8htoonesetofcontrol and exposure testspecimens and apply coating to another set of control andexposure test specimens within 48 to 56 h. Select shorter timeswhen inhibitor shows flash rusting before either of these timeperiods.4.5 Record relative humidity range and drying time aftertre
23、atment and before coating. Apply remaining coats as rec-ommended by the coating manufacturer.5. Procedure5.1 Select as a minimum, one of the tests that best simulatesthe intended service condition of the coating system (see Table1): Specification B117, Practice D 2247, and NACE TM-01-74 Method B. Ot
24、her tests on weathering, such as PracticeD 822, or cyclic testing, elevated temperatures, chemicalimmersion, radiation or design basic accident (DBA) may alsobe used to examine inhibitors with a coating for specificexposure conditions.5.2 Use a different time schedule for comparison testingdepending
25、 on the generic coating being tested with the inhibi-tor. Schedule more frequent examination schedules in order tomore accurately identify time when changes in coating condi-tions occur.5.3 Conduct two adhesion tests in accordance with TestMethods D 4541 or D 3359, Test Method B, elcometer or tapete
26、st procedures at each time period on both the control andexposure test samples.5Repair adhesion test areas beforecontinuing the test.6. Report6.1 Report blistering and scribe corrosion as appropriate forthe test method and report conditions of test samples inaccordance with Test Methods D 714 and D
27、1654 at each testtime. Report adhesion test values and where failure occurredfor each test condition and time. Report sample preparationconditions including:6.1.1 Abrasive blast profile in accordance with Test Meth-ods D 4417,6.1.2 Dry film thickness of each coat,6.1.3 Inhibitor used and concentrati
28、on,6.1.4 Time between inhibitor treatment to coating applica-tion and relative humidity range, and6.1.5 Coating, thinner and application method used.7. Keywords7.1 abrasive blasting; coatings; inhibitors; surface prepara-tion; water blasting5The two adhesion tests will not provide the precision, if
29、any, indicated in thereferenced methods.TABLE 1 Recommended Exposure Tests and ExaminationSchedulesExposure Test MethodGuide toRecommendedTest TimeExaminationSchedule, hMarine AtmosphereSteel panel size, in.14 by4 by 12 Salt fog (Test Method B117),(scribed)100020004000High Moisture CondensingAtmosph
30、ere, in.14 by 3 by 8 Cleveland condensing(Practice D 2247)50010002000Water Immersion, in.14 by 3 by 12 Deionized water immersionNACE TM01-74, Method B219043808760D5367082ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin
31、 this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and mus
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33、responsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).D5367083
