1、Designation: D5065 17Standard 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 determining the structuralcondition of a steel substrate. It provides procedures todetermine the percent of the s
4、urface rusted, but not the severity,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 concerns, if any, ass
5、ociated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally r
6、ecognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D610 Practice for
7、 Evaluating Degree of Rusting on PaintedSteel SurfacesD660 Test Method for Evaluating Degree of Checking ofExterior PaintsD714 Test Method for Evaluating Degree of Blistering ofPaintsD3359 Test Methods for Rating Adhesion by Tape TestD4214 Test Methods for Evaluating the Degree of Chalkingof Exterio
8、r Paint FilmsD4541 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 Nondestructiv
9、e Measurement of DryFilm 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 Society for Protective Coatings:3SSPC Technology Update No. 3 Overcoating3. Summary
10、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 substrate rusting usingvisual guides and evaluation tools. A form for recordi
11、ng theresults 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 coating maintenanceprocedures, and provides a means to charact
12、erize performanceof coating systems. SSPC Technology Update No. 3 discussesthe risks associated with selecting overcoating as a mainte-nance strategy, particularly without performing visual assess-ments and evaluating the physical properties of the existingcoating system(s) described in Section 5.5.
13、 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 service1This guide is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings, Materials, and Appl
14、ications and is the direct responsibility ofSubcommittee D01.46 on Industrial Protective Coatings.Current edition approved Dec. 1, 2017. Published December 2017. Originallyapproved in 1990. Last previous edition approved in 2013 as D5065 13. DOI:10.1520/D5065-17.2For referenced ASTM standards, visit
15、 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.3Available from The Society for Protective Coatings (SSPC), 800 TrumbullDrive, Pittsburgh, PA 1520
16、5-4365, http:/www.sspc.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles
17、for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1exposure environment for each, (2) visually identify areashaving a typical level of coating deterioration and rust break-through for each comp
18、onent and (3) identify areas having amuch greater visual level of deterioration than typical andunique environmental conditions that may correspond to theseareas (for example, beneath bridge deck expansion joints).Record a description of the components and their generalenvironment on an inspection f
19、orm and describe areas havinggreater deterioration, as well as any unique associated environ-ments in the remarks column. A suggested general format fordata collection is shown in Fig. 1. Modification of the form (forexample, adding or deleting specific items) will be required foreach specific appli
20、cation.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 for rus
21、tbreakthrough (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 as agreed upon between interested parties. Record therating in
22、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. Ifadditio
23、nal 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 D660 to define type and exte
24、nt.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. Forstructural steel, determine the type of previous surface prepa-
25、ration evidenced by the presence of millscale or surface profile(from abrasive blast cleaning). Identify evidence of corrosionfrom the presence of pits, black anodic spots or corrosion scale.Record the results of the examination on the report form.5.4 Using one of the procedures described in Practic
26、eD7091, determine the coating thickness in enough areas ofeach component to ensure a representative sample. Record themeasured thicknesses.5.5 If a measure of coating adhesion is desired, use one ofthe procedures described in Test Methods D3359, D4541,orD6677. Determine coating adhesion in enough ar
27、eas of eachcomponent to ensure a representative sample. Record theadhesion rating or value, the procedure and equipment used.NOTE 3The number of areas that coating thickness and adhesion ismeasured will depend upon the desired precision of the measurement.More measurements would be made on structure
28、s in which knowledge ofthe coating thickness and adhesion variability across the component orstructure is required.5.6 If required 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 th
29、e paint sample in accordance with Practice D6206.Tothe extent possible, each layer of the film should be character-ized.5.7 If required for a maintenance decision, determine theconcentration of heavy metals in the coating from a fieldsample. Collect the paint samples in accordance with therequiremen
30、ts of Practice D5702.6. Report6.1 Prepare an inspection report. Fig. 1 provides an exampleof the types of information to be included.7. Keywords7.1 assessment; coatings; condition; field; overcoating;paintCondition AssessmentStructure Date Inspector Overall EnvironmentOriginalCoating System1st Maint
31、enanceCoating System2nd MaintenanceCoating SystemSurface Preparation Surface Preparation Surface PreparationYear Applied Year Applied Year AppliedPrimer Primer PrimerMidcoat Midcoat MidcoatMidcoat Midcoat MidcoatTopcoat Topcoat TopcoatStructure Description Ratings MeasurementsComponentLocal Environ-
32、mentRustAUnder filmConditionAPeeling Blistering Cracking Chalking Thickness Adhesion RemarksARusting corresponds to Test Methods D610, that is, that which is observed upon visual inspection of the coated surface while underfilm condition corresponds to substratecondition under an intact coating as d
33、escribed in Section 5.3.FIG. 1 Example 1 Report FormD5065 172ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such p
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36、r 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 sta
37、ndard 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 173
