ASTM D5065-2007 Standard Guide for Assessing the Condition of Aged Coatings on Steel Surfaces《钢表面老化涂层条件的评估用标准指南》.pdf

1、Designation: D 5065 07Standard Guide forAssessing the Condition of Aged Coatings on SteelSurfaces1This standard is issued under the fixed designation D 5065; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision

2、 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 guide describes general procedures for conductinga detailed assessment of the condition of aged coatings on steelstructures a

3、nd the extent of rust breakthrough of the coatedsurface. Additional assessment may be required to supportcoating failure analyses or other job specific needs.1.2 This guide does not address the problem of determiningthe structural condition of a steel substrate. It provides proce-dures to determine

4、the percent of the surface rusted, but not theseverity, condition, or cause of such rusting.NOTE 1Amore comprehensive condition assessment procedure, Prac-tice F 1130, has been developed for determining the condition of coatingson a ship.1.3 This standard does not purport to address all of thesafety

5、 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 limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 610 Test Method for Evaluating D

6、egree of Rusting onPainted Steel SurfacesD 660 Test Method for Evaluating Degree of Checking ofExterior PaintsD 714 Test Method for Evaluating Degree of Blistering ofPaintsD 3359 Test Methods for Measuring Adhesion by Tape TestD 4214 Test Methods for Evaluating the Degree of Chalk-ing of Exterior Pa

7、int Films3D 4541 Test Method for Pull-Off Strength of CoatingsUsing Portable Adhesion TestersD 5702 Practice for Field Sampling of Coating Films forAnalysis for Heavy MetalsD 6206 Practice for Sampling of Coating FilmsD 7091 Practice for Nondestructive Measurement of DryFilm Thickness of Nonmagnetic

8、 Coatings Applied toFerrous Metals and Nonmagnetic, Nonconductive Coat-ings Applied to Non-Ferrous MetalsF 1130 Practice for Inspecting the Coating System of a Ship2.2 Steel Structures Painting Council Standard:4SSPC-PA-2 Measurement of Dry Paint Thickness withMagnetic Gages3. Summary of Practice3.1

9、 This practice for assessing the condition of coatingsconsists of identifying general types of components of astructure and assessing each separately for commonly occur-ring modes of coating deterioration and rust breakthrough ofthe coating using visual standards and simple evaluation tools.A form f

10、or recording the results of the assessment procedure(Fig. 1) is provided.4. Significance and Use4.1 Assessment of the condition of aged coated surfacesstrengthens decisions on when coating maintenance is re-quired, aids in the selection of effective coating maintenanceprocedures, and provides a mean

11、s to characterize performanceof coating systems.5. Procedure5.1 Survey the structure to (1) determine the general typesof unique components (for example, for fuel tanks the compo-nents may be shell, roof, ladders, and piping) and the serviceexposure environment for each, (2) visually identify areash

12、aving a typical level of coating deterioration and rust break-through for each component and (3) identify areas having amuch greater visual level of deterioration than typical andunique environmental conditions that may correspond to theseareas (for example, bridge expansion joints). Record a descri

13、p-tion of the components and their general environment on aninspection form and describe areas having greater deteriora-tion, as well as any unique associated environments in the1This guide is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings, Materials, and Applications and

14、is the direct responsibility ofSubcommittee D01.46 on Industrial Protective Coatings.Current edition approved July 1, 2007. Published July 2007. Originally approvedin 1990. Last previous edition approved in 2001 as D 5065 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcon

15、tact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.4Available from Society for Protective Coatings (SSPC), 40 24th St., 6th Floor,Pittsburgh, PA 15222-4656, http:/www.sspc.org.

16、1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.remarks column.Asuggested general format for data collectionis shown in Fig. 1. Modification of the form (for example,adding or deleting specific items) will be required for eachspecifi

17、c application.5.2 Based upon the knowledge of what constitutes typicaldeterioration for each component as determined in the initialsurvey, examine the condition of the coating on a representa-tive sample of each component. Rate the condition of thecoatings using the appropriate ASTM visual standard

18、for rustbreakthrough (Test Method D 610), blistering (Test MethodD 714), peeling (use Test Methods D 610 to report amount),chalking (Test Methods D 4214), and cracking/checking (TestMethod D 660) of the coating film or other appropriateprocedures as agreed upon between interested parties. Recordthe

19、rating in the appropriate column of the report form for eachcomponent. Determine and record the type of peeling, forexample, intercoat delamination. Rate the condition in enoughareas to ensure that for each component the coating evaluationis representative of the condition over the entire structure.

20、 Ifadditional areas of greater deterioration are detected during thisassessment, make note of them in the remarks column.NOTE 2For the purpose of an initial general assessment, cracking andchecking can be assessed as one type of failure, using the pictorialstandards in Test Method D 660 to define ty

21、pe and extent.5.3 When rusting beneath an intact coating film is sus-pected, remove the coating and examine the condition of theunderlying substrate. Remove apparently intact coatings usingchemical strippers or closely spaced parallel knife cuts. Forstructural steel, determine the type of previous s

22、urface prepa-ration from the presence of millscale or profile. Identifyevidence of corrosion from the presence of pits, black anodicspots or corrosion scale. Record the results of the examinationon the report form.5.4 Using one of the procedures described in PracticeD 7091, determine the coating thi

23、ckness in enough areas ofeach component (refer to SSPC-PA-2 for guidance) to ensure arepresentative measure. Record the measured thicknesses.5.5 If a measure of coating adhesion is desired, use one ofthe procedures described in Test Methods D 3359 or D 4541.Determine coating adhesion in enough areas

24、 of each compo-nent to ensure a representative measure. Record the adhesionreading and the type of procedure and equipment used.NOTE 3The number of areas in which coating thickness and adhesionis measured will depend upon the desired precision of the measurement.More measurements would be made on st

25、ructures in which preciseknowledge of the thickness and adhesion of the coating is required.SSPC-PA-2 states the required number of thickness measurements as afunction of coating area for conformance of thickness to a specification.5.6 If required for a maintenance decision, identify thegeneric type

26、s) of the existing coating film component fromrecords or by analyzing a sample of paint in the laboratory.Collect the paint sample in accordance with Practice D 6206.To the extent possible, each layer of the film should becharacterized.5.7 If required for a maintenance decision, determine theconcen

27、tration of heavy metals in the coating from a fieldsample. Collect the paint samples in accordance with therequirements of Practice D 5702.6. Report6.1 Prepare an inspection report. Fig. 1 provides an exampleof the types of information to be included.7. Keywords7.1 assessment; coatings; condition; f

28、ield; paint; weatheredCondition AssessmentStructure Date Inspector Overall EnvironmentOriginalCoating System1st MaintenanceCoating System2nd MaintenanceCoating SystemSurface Preparation Surface Preparation Surface PreparationYear Applied Year Applied Year AppliedPrimer Primer PrimerMidcoat Midcoat M

29、idcoatMidcoat Midcoat MidcoatTopcoat Topcoat TopcoatStructure Description Ratings MeasurementsComponentLocal Environ-mentRustAUnder filmConditionAPeeling Blistering Cracking Chalking Thickness Adhesion RemarksARusting corresponds to Test Methods D 610, that is, that observed upon visual inspection o

30、f the coated surface while underfilm condition corresponds to substratecondition under an intact coating as described in Section 4.FIG. 1 Example 1 Report FormD5065072ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin th

31、is 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 must b

32、e reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theres

33、ponsible 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).D5065073