ASTM D6990-05
(Practice)Standard Practice for Evaluating Biofouling Resistance and Physical Performance of Marine Coating Systems
Standard Practice for Evaluating Biofouling Resistance and Physical Performance of Marine Coating Systems
SIGNIFICANCE AND USE
This practice is designed to provide guidance to a panel inspector for quantitative and consistent evaluation of coating performance from test panels coated with marine antifouling coating systems. The practice assesses performance of coating systems based on both antifouling and physical properties.
The user is cautioned that the results are representative for the specific region and time of year in which the specimens are immersed. It shall be noted that interpretation of results will depend on the geographical location where the test is conducted, whether the coated specimens are exposed either totally or partially immersed, under static or dynamic conditions, and position and orientation.
Simultaneous testing of a proven standard antifouling coating system (known to minimize fouling accumulation, for example, containing biocide or active agent(s) to prevent fouling settlement/growth) in the specific marine environment shall be included as a reference to assist in interpretation of results. In addition, a negative control (inert surface susceptible to heavy fouling) shall be included on a regular basis. For the exposure to be valid, the surface of the negative control should show heavy fouling relative to the standard system(s).
Marine coating systems that produce positive results relevant to the standard system(s) show potential for use in protecting underwater marine structures.
The format can be utilized independent of exposure protocol and coating type, and provides the end user with a consistent practice and format for reporting of performance rating.
SCOPE
1.1 This method establishes a practice for evaluating degree of biofouling settlement on and physical performance of marine coating systems when panels coated with such coating systems are subjected to immersion conditions in a marine environment. Guidance for preparation or exposure and handling of test specimens can be found in related ASTM standards as noted below (see Section ).
1.2 This practice and related exposure methodologies are designed as tools for the relative assessment of coating performance, and in no way are to be used as an absolute indicator of long-term performance under all conditions and in all environments. There can be high variability among and within exposure sites with respect to water quality and population or species of fouling organisms, and coating performance may vary with these and other properties.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. A specific hazard statement is given in Section .
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D6990–05
Standard Practice for
Evaluating Biofouling Resistance and Physical Performance
1
of Marine Coating Systems
This standard is issued under the fixed designation D6990; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D3623 Test Method for TestingAntifouling Panels in Shal-
low Submergence
1.1 Thispracticeestablishesapracticeforevaluatingdegree
D4938 Test Method for Erosion Testing of Antifouling
of biofouling settlement on and physical performance of
Paints Using High Velocity Water
marine coating systems when panels coated with such coating
D4939 Test Method for Subjecting Marine Antifouling
systems are subjected to immersion conditions in a marine
Coating to Biofouling and Fluid Shear Forces in Natural
environment. Guidance for preparation or exposure and han-
Seawater
dling of test specimens can be found in related ASTM
D5479 PracticeforTestingBiofoulingResistanceofMarine
standards as noted below (see Section 2).
Coatings Partially Immersed
1.2 This practice and related exposure methodologies are
D5618 Test Method for Measurement of BarnacleAdhesion
designed as tools for the relative assessment of coating
Strength in Shear
performance, and in no way are to be used as an absolute
G141 Guide forAddressing Variability in Exposure Testing
indicator of long-term performance under all conditions and in
of Nonmetallic Materials
all environments. There can be high variability among and
within exposure sites with respect to water quality and popu-
3. Terminology
lation or species of fouling organisms, and coating perfor-
3.1 Definitions of Terms Specific to This Standard:
mance may vary with these and other properties.
3.1.1 biofilm, n—matrix-enclosed populations of microor-
1.3 The values stated in SI units are to be regarded as the
ganisms adherent to each other or to surfaces, or both, or
standard. The values given in parentheses are for information
interfaces.
only.
3.1.2 biofouling adhesion, n—qualitative or quantitative
1.4 This standard does not purport to address all of the
force required for the successful and complete removal of
safety concerns, if any, associated with its use. It is the
marine fouling attached to the antifouling coating surface (for
responsibility of the user of this standard to establish appro-
example, reference Test Method D5618 for barnacles).
priate safety and health practices and determine the applica-
3.1.3 corrosion eruptions, n—build up of oxides, exiting
bility of regulatory limitations prior to use. A specific hazard
through protective paint film.
statement is given in Section 6.
3.1.4 damage, n—limited destruction of portions of paint
2. Referenced Documents film due to impact with a foreign article.
2 3.1.5 digging, n—a term used to describe hard fouling
2.1 ASTM Standards:
macroorganisms that are growing “into” the coating. That is,
RecommendedASTM Methods and Practices for evaluation
where its calcareous shell penetrates/breaks through the coat-
of antifouling coatings via panel exposure under a variety of
ing surface causing physical damage to the coating.
exposure conditions:
3.1.6 macroorganism, n—organisms large enough to be
seen with the naked eye and thus would be noted when
1
This practice is under the jurisdiction of ASTM Committee D01 on Paint and
growing on submerged surfaces.
Related Coatings, Materials, and Applications and is the direct responsibility of
3.1.7 microorganism, n—organisms too small to be seen
Subcommittee D01.45 on Marine Coatings.
with the naked eye, which generally include bacteria, protozoa,
Current edition approved Jan. 1, 2005. Published February 2005. Originally
approved in 2003. Last previous edition approved in 2003 as D6990 – 03. DOI:
fungi and microalgae (sometimes collectively called “slime”).
10.1520/D6990-05.
3.1.8 peeling, n—the phenomenon manifested in paint films
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
where a portion of a film, when pulled, can be removed in
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on strips or relatively large intact pieces, or both.
the ASTM website.
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D6990–05
3.1.9 silt, n—sedimentary material consisting especially of dling of panels coated with various types of marine paints, the
mineral particles intermediate in size between those of sand use of appropriate prote
...
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