ASTM D5065-2013 Standard Guide for Assessing the Condition of Aged Coatings on Steel Surfaces《钢表面老化涂层状况评定的标准指南》.pdf

1、Designation: D5065 13Standard Guide forAssessing the Condition of Aged Coatings on SteelSurfaces1This standard is issued under the fixed designation D5065; 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 () 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 and

3、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 the

4、 percent of the surface rusted, but not theseverity, condition, or cause of such rusting.NOTE 1A more comprehensive condition assessment procedure,Practice F1130, has been developed for determining the condition ofcoatings on a ship.1.3 This standard does not purport to address all of thesafety conc

5、erns, 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:2D610 Practice for Evaluating Degree of

6、Rusting on PaintedSteel SurfacesD660 Test Method for Evaluating Degree of Checking ofExterior PaintsD714 Test Method for Evaluating Degree of Blistering ofPaintsD3359 Test Methods for Measuring Adhesion by Tape TestD4214 Test Methods for Evaluating the Degree of Chalkingof Exterior Paint FilmsD4541

7、Test Method for Pull-Off Strength of Coatings UsingPortable Adhesion TestersD5702 Practice for Field Sampling of Coating Films forAnalysis for Heavy MetalsD6206 Practice for Sampling of Coating FilmsD6677 Test Method for Evaluating Adhesion by KnifeD7091 Practice for Nondestructive Measurement of Dr

8、yFilm Thickness of Nonmagnetic Coatings Applied toFerrous Metals and Nonmagnetic, Nonconductive Coat-ings Applied to Non-Ferrous MetalsF1130 Practice for Inspecting the Coating System of a Ship2.2 Steel Structures Painting Council Standard:3SSPC-PA-2 Procedure for Determining Conformance to DryCoati

9、ng Thickness Requirements3. Summary of Practice3.1 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 vis

10、ual standards and simple evaluation tools.A form for 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 isrequired, aids in the selection of effective co

11、ating maintenanceprocedures, and provides a means 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 en

12、vironment for each, (2) visually identify areashaving 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 these1This guide i

13、s under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings, Materials, and Applications and is the direct responsibility ofSubcommittee D01.46 on Industrial Protective Coatings.Current edition approved June 1, 2013. Published June 2013. Originallyapproved in 1990. Last previous edit

14、ion approved in 2007 as D5065 07. DOI:10.1520/D5065-13.2For 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.3Avail

15、able from Society for Protective Coatings (SSPC), 40 24th St., 6th Floor,Pittsburgh, PA 15222-4656, http:/www.sspc.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1areas (for example, bridge expansion joints). Record a descrip-tion

16、 of the components and their general environment on aninspection form and describe areas having greaterdeterioration, as well as any unique associated environments inthe remarks column. A suggested general format for datacollection is shown in Fig. 1. Modification of the form (forexample, adding or

17、deleting specific items) will be required foreach specific 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 o

18、f thecoatings using the appropriate ASTM visual standard for rustbreakthrough (Test Method D610), blistering (Test MethodD714), peeling (use Test Methods D610 to report amount),chalking (Test Methods D4214), and cracking/checking (TestMethod D660) of the coating film or other appropriate proce-dures

19、 as agreed upon between interested parties. Record therating 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 repr

20、esentative of the condition over the entire structure. 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 th

21、e pictorialstandards in Test Method D660 to define type and extent.5.3 When rusting beneath an intact coating film issuspected, remove the coating and examine the condition of theunderlying substrate. Remove apparently intact coatings usingchemical strippers or closely spaced parallel knife cuts. Fo

22、rstructural steel, determine the type of previous surface 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 des

23、cribed in PracticeD7091, determine the coating thickness 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 D3359, D4

24、541,orD6677. Determine coating adhesion in enough areas of eachcomponent to ensure a representative measure. Record theadhesion reading and the type of procedure and equipmentused.NOTE 3The number of areas in which coating thickness and adhesionis measured will depend upon the desired precision of t

25、he measurement.More measurements would be made on structures 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

26、for a maintenance decision, identify thegeneric type(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 D6206.Tothe extent possible, each layer of the film should be character-ized.5.7 If requ

27、ired for a maintenance decision, determine theconcentration of heavy metals in the coating from a fieldsample. Collect the paint samples in accordance with therequirements of Practice D5702.6. Report6.1 Prepare an inspection report. Fig. 1 provides an exampleof the types of information to be include

28、d.7. Keywords7.1 assessment; coatings; condition; field; paint; weatheredCondition AssessmentStructure Date Inspector Overall EnvironmentOriginalCoating System1st MaintenanceCoating System2nd MaintenanceCoating SystemSurface Preparation Surface Preparation Surface PreparationYear Applied Year Applie

29、d Year AppliedPrimer Primer PrimerMidcoat Midcoat MidcoatMidcoat Midcoat MidcoatTopcoat Topcoat TopcoatStructure Description Ratings MeasurementsComponentLocal Environ-mentRustAUnder filmConditionAPeeling Blistering Cracking Chalking Thickness Adhesion RemarksARusting corresponds to Test Methods D61

30、0, that is, that observed upon visual inspection of the coated surface while underfilm condition corresponds to substratecondition under an intact coating as described in Section 4.FIG. 1 Example 1 Report FormD5065 132ASTM International takes no position respecting the validity of any patent rights

31、asserted in connection with any item mentionedin 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 tim

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33、eceive careful consideration at a meeting of theresponsible 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 I

34、nternational, 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D5065 133