1、Designation:D699005(Reapproved 2011)Standard Practice forEvaluating Biofouling Resistance and Physical Performanceof Marine Coating Systems1This standard is issued under the fixed designation D6990;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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice establishes a practice for evaluating degreeof biofouling settlement on and physical
3、 performance ofmarine coating systems when panels coated with such coatingsystems are subjected to immersion conditions in a marineenvironment.Guidance for preparation or exposure and han-dling of test specimens can be found in related ASTMstandards as noted below(see Section 2).1.2 This practice an
4、d related exposure methodologies aredesigned as tools for the relative assessment of coatingperformance,and in no way are to be used as an absoluteindicator of long-term performance under all conditions and inall environments.There can be high variability among andwithin exposure sites with respect
5、to water quality and popu-lation or species of fouling organisms,and coating perfor-mance may vary with these and other properties.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 This standard does not purport to address
6、 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.A specific hazardstatement is given in Section 6.2.Referenced D
7、ocuments2.1 ASTM Standards:2Recommended ASTM Methods and Practices for evaluationof antifouling coatings via panel exposure under a variety ofexposure conditions:D3623 Test Method for Testing Antifouling Panels in Shal-low SubmergenceD4938 Test Method for Erosion Testing of AntifoulingPaints Using H
8、igh Velocity WaterD4939 Test Method for Subjecting MarineAntifouling Coat-ing to Biofouling and Fluid Shear Forces in NaturalSeawaterD5479 Practice for Testing Biofouling Resistance of MarineCoatings Partially ImmersedD5618 Test Method for Measurement of Barnacle AdhesionStrength in ShearG141 Guide
9、for Addressing Variability in Exposure Testingof Nonmetallic Materials3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 biofilm,nmatrix-enclosed populations of microor-ganisms adherent to each other or to surfaces,or both,orinterfaces.3.1.2 biofouling adhesion,nqualitative or qua
10、ntitativeforce required for the successful and complete removal ofmarine fouling attached to the antifouling coating surface(forexample,reference Test Method D5618 for barnacles).3.1.3 corrosion eruptions,nbuild up of oxides,exitingthrough protective paint film.3.1.4 damage,nlimited destruction of p
11、ortions of paintfilm due to impact with a foreign article.3.1.5 digging,na term used to describe hard foulingmacroorganisms that are growing“into”the coating.That is,where its calcareous shell penetrates/breaks through the coat-ing surface causing physical damage to the coating.3.1.6 macroorganism,n
12、organisms large enough to be seenwith the naked eye and thus would be noted when growing onsubmerged surfaces.3.1.7 microorganism,norganisms too small to be seenwith the naked eye,which generally include bacteria,protozoa,fungi and microalgae(sometimes collectively called“slime”).3.1.8 peeling,nthe
13、phenomenon manifested in paint filmswhere a portion of a film,when pulled,can be removed instrips or relatively large intact pieces,or both.1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcom
14、mittee D01.45 on Marine Coatings.Current edition approved June 1,2011.Published June 2011.Originallyapproved in 2003.Last previous edition approved in 2005 as D6990 05.DOI:10.1520/D6990-05R11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servic
15、eastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.9 silt,nsedimentary material consisting especially ofmineral
16、 particles intermediate in size between those of sandand clay.3.1.10 softness,advthe phenomenon manifested by paintsin transferring some of its pigmentation to a foreign item orsubstance,upon encountering friction on its surface.3.1.11 wearing,ngradual loss of the paint film caused byuse or exposure to the environment.4.Summary of Practice4.1 Test specimens or panels are coated with marine coatingsystems and exposed to marine immersion conditions for aspecified amount of time and under specific