ASTM D610-2008 Standard Practice for Evaluating Degree of Rusting on Painted Steel Surfaces《涂漆钢表面锈蚀程度评价的试验方法》.pdf

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1、Designation: D 610 08Society for Protective CoatingsSSPC-VIS-2Standard Practice forEvaluating Degree of Rusting on Painted Steel Surfaces1This standard is issued under the fixed designation D 610; the number immediately following the designation indicates the year oforiginal adoption or, in the case

2、 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This pract

3、ice covers the evaluation of the degree ofrusting on painted steel surfaces. The visual examples whichdepict the percentage of rusting given in the written specifica-tions form part of the standard. In the event of a dispute, thewritten definition prevails. These visual examples were devel-oped in c

4、ooperation with SSPC: The Society for ProtectiveCoatings to further standardization of methods. The photo-graphs can be used to estimate the percentage of other coatingdefects on various substrates. This standard does not includeevaluation of rust propagation around an initially preparedscribe, scor

5、e, or holiday.1.2 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 limitations prior to use.2

6、. Referenced Documents2.1 ASTM Adjunct/SSPC: The Society for Protective Coat-ings:SSPC-VIS 2/ASTM D 610 Standard Method of EvaluatingDegrees of Rusting on Painted Steel Surfaces23. Significance and Use3.1 The amount of rusting beneath or through a paint film isa significant factor in determining whe

7、ther a coating systemshould be repaired or replaced. This practice provides astandardized means for quantifying the amount and distributionof visible surface rust.3.2 The degree of rusting is evaluated using a zero to tenscale based on the percentage of visible surface rust.3.3 The distribution of t

8、he rust is classified as spot rust,general rust, pinpoint rust or hybrid rust.4. Interferences4.1 The visual examples that are part of this practice and theassociated rust-grade scale cover only rusting evidenced byvisible surface rust.4.2 The use of the visual examples requires the followingcaution

9、s:4.2.1 Some finishes are stained by rust. This staining mustnot be confused with the actual rusting involved.4.2.2 Accumulated dirt or other material may make accuratedetermination of the degree of rusting difficult.4.2.3 Certain types of deposited dirt that contain iron or ironcompounds may cause

10、surface discoloration that should not bemistaken for corrosion.4.2.4 Failure may vary over a given area. Discretion musttherefore be used when selecting a single rust grade or rustdistribution that is to be representative of a large area orstructure, or in subdividing a structure for evaluation.4.2.

11、5 The color of the finish coating should be taken intoaccount in evaluating surfaces as failures will be more apparenton a finish that shows color contrast with rust, such as used inthese reference standards, than on a similar color, such as aniron oxide finish.5. Procedure5.1 Select an area to be e

12、valuated.5.2 Determine the type of rust distribution using definitionsin Table 1 and visual examples in Fig. 1, Fig. 2, and Fig. 3.5.3 Estimate percentage of surface area rusted using thevisual examples in Fig. 1, Fig. 2, and Fig. 3 or SSPC-VIS 2,orboth, by electronic scanning techniques or other me

13、thod agreedupon by contracting parties.5.4 Do not consider flow of corrosion products onto thesurface of intact coating (that is, “rust bleed” or staining) aspart of the surface area rust. It may be helpful to wipe thesurface with a damp cloth to remove the rust bleed beforeevaluating.1This practice

14、 is 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.This practice has been jointly approved by ASTM and SSPC: The Society forProtective Coatings.Current edi

15、tion approved Feb. 1, 2008. Published March 2008. Originallyapproved in 1941. Last previous edition approved in 2007 as D 610 07.2Colored visual examples are available at a nominal cost from ASTM Interna-tional Headquarters (request Adjunct ADJD0610A), SSPC Publication No. 00-08from The Society for

16、Protective Coatings (SSPC), 40 24th St., 6th Floor, Pittsburgh,PA 15222-4656, http:/www.sspc.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.5 Use percentage of surface area rusted to identify rustgrade (see Table 1). Assign ru

17、st rating using rust grade of 0-10followed by the type of rust distribution identified by S forspot, G for general, P for pinpoint or H for Hybrid.NOTE 1The numerical rust grade scale is an exponential function ofthe area of rust. Plotting the rust grade versus area of rust results in astraight line

18、 in semilogarithmic coordinates. The slope of the line changesat 10 % of the area rusted to allow it to resolve differences below 10 %across rust grades from 10 to 4 while including 10 to 100 % in rust grades3 through 0.5.6 The visual examples are not required for use of therust-grade scale since th

19、e scale is based upon the percent of thearea rusted and any method of assessing area rust may be usedto determine the rust grade.6. Report6.1 Identify sample or area evaluated.6.2 Report rust grade using rating of 0-10.6.3 Report rust distribution using S for Spot, G for General,P for Pinpoint and H

20、 for Hybrid.7. Precision and Bias7.1 No precision or bias statement can be made for thispractice.8. Keywords8.1 corrosion; rustingTABLE 1 Scale and Description of Rust RatingsVisual ExamplesRust Grade Percent of Surface Rusted Spot(s) General (G) Pinpoint (P)10 Less than or equal to 0.01 percent Non

21、e9 Greater than 0.01 percent and up to 0.03 percent 9S 9G 9P8 Greater than 0.03 percent and up to 0.1 percent 8S 8G 8P7 Greater than 0.1 percent and up to 0.3 percent 7S 7G 7P6 Greater than 0.3 percent and up to 1.0 percent 6S 6G 6P5 Greater than 1.0 percent and up to 3.0 percent 5S 5G 5P4 Greater t

22、han 3.0 percent and up to 10.0 percent 4S 4G 4P3 Greater than 10.0 percent and up to 16.0 percent 3S 3G 3P2 Greater than 16.0 percent and up to 33.0 percent 2S 2G 2P1 Greater than 33.0 percent and up to 50.0 percent 1S 1G 1P0 Greater than 50 percent NoneRust Distribution Types:S: Spot RustingSpot ru

23、sting occurs when the bulk of the rusting is concentrated in a few localized areas of the painted surface. The visual examples depicting thistype of rusting are labeled 9-S through 1-S (See Fig. 1, Fig. 2, and Fig. 3).G: General RustingGeneral rusting occurs when various size rust spots are randomly

24、 distributed across the surface. The visual examples depicting this type of rustingare labeled 9-G through 1-G. (See Fig. 1, Fig. 2, and Fig. 3).P: Pinpoint RustingPinpoint rusting occurs when the rust is distributed across the surface as very small individual specks of rust. The visual examples dep

25、icting thistype of rusting are labeled 9-P through 1-P. (See Fig. 1, Fig. 2, and Fig. 3).H: Hybrid RustingAn actual rusting surface may be a hybrid of the types of rust distribution depicted in the visual examples. In this case, report the total percent ofrust to classify the surface. 9-H through 1-

26、H.D610082FIG. 1 Examples of Area PercentagesD610083FIG. 2 Examples of Area PercentagesD610084FIG. 3 Examples of Area PercentagesD610085ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this stand

27、ard 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 be reviewed every five years andi

28、f 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 theresponsible technical committee, wh

29、ich 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).D610086