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ASTM D6442-05

(Test Method)

Standard Test Method for Determination of Copper Release Rate From Antifouling Coatings in Substitute Ocean Water

Standard Test Method for Determination of Copper Release Rate From Antifouling Coatings in Substitute Ocean Water

SCOPE
1.1 This test method covers the laboratory determination of the rate at which copper is released from an antifouling coating in substitute ocean water. The practical limits for quantifying copper release rates by this method are from 1.8 to 500 g cm-2d-1. This range may be extended to 0.2 to 500 g cm-2d -1  if the analytical procedure described in is followed.
1.2 The procedure contains the preparation steps for the release rate determination of copper from antifouling paints including apparatus, reagents, holding tank conditions, and sampling point details. Analysis for the concentration of copper in substitute ocean water requires the accurate determination of copper at the low parts g L-1 (parts per billion, ppb) level. To detect and correct for reagent impurities, acceptable analytical precision standards are necessary. Therefore, the limit of quantitation (LOQ) for copper in substitute ocean water for the analytical method shall be 10 g L-1 (10 ppb) or less. The procedure for determining the LOQ for copper in substitute ocean water for the analytical method is found in .
1.3 A suitable method is described in (graphite furnace atomic absorption spectroscopy, GF-AAS). Other analytical methods may be utilized with relevant procedural changes, as needed, to accommodate selected specific methods. Such methods must meet the limit of quantitation for copper in substitute ocean water of 10 g L-1(10 ppb) or less. See 1.2.
1.4 This test method has not been validated to reflect in situ copper release rates for antifouling products and, therefore should not be used in the process of generating environmental risk assessments. In-service release rates of antifouling (AF) coatings change with natural variability in seawater chemistry, temperature, and hydrodynamic regime.
1.5 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.6 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 practices and to determine the applicability of regulatory limits prior to use. For specific hazard statements, see Section 7.

General Information

Status
Historical
Publication Date
30-Jun-2005
ICS
87.040 - Paints and varnishes
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.45 - Marine Coatings
Current Stage
Ref Project

Relations

Replaces
ASTM D6442-03 - Standard Test Method for Determination of Copper Release Rate From Antifouling Coating Systems in Artificial Seawater
Effective Date
01-Jul-2005
Replaced By
ASTM D6442-06 - Standard Test Method for Determination of Copper Release Rate From Antifouling Coatings in Substitute Ocean Water
Effective Date
01-Jun-2006
Referred By
ASTM D6903-07(2020) - Standard Test Method for Determination of Organic Biocide Release Rate From Antifouling Coatings in Substitute Ocean Water
Effective Date
01-Jul-2005

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ASTM D6442-05 - Standard Test Method for Determination of Copper Release Rate From Antifouling Coatings in Substitute Ocean WaterASTM D6442-05 - Standard Test Method for Determination of Copper Release Rate From Antifouling Coatings in Substitute Ocean Water
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ASTM D6442-05 - Standard Test Method for Determination of Copper Release Rate From Antifouling Coatings in Substitute Ocean Water
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D 6442 – 05
Standard Test Method for
Determination of Copper Release Rate From Antifouling
1
Coatings in Substitute Ocean Water
This standard is issued under the fixed designation D 6442; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope* responsibility of the user of this standard to establish appro-
priate safety practices and to determine the applicability of
1.1 This test method covers the laboratory determination of
regulatory limits prior to use. For specific hazard statements,
the rate at which copper is released from an antifouling coating
see Section 7.
in substitute ocean water. The practical limits for quantifying
copper release rates by this method are from 1.8 to 500 µg
2. Referenced Documents
-2 -1 -2 -1
cm d . This range may be extended to 0.2 to 500 µg cm d
2
2.1 ASTM Standards:
if the analytical procedure described in Appendix X1 is
D 1005 Test Method for Measurement of Dry-Film Thick-
followed.
ness of Organic Coatings Using Micrometers
1.2 The procedure contains the preparation steps for the
D 1141 Practice for the Preparation of Substitute Ocean
release rate determination of copper from antifouling paints
Water
including apparatus, reagents, holding tank conditions, and
D 1193 Specification for Reagent Water
samplingpointdetails.Analysisfortheconcentrationofcopper
insubstituteoceanwaterrequirestheaccuratedeterminationof
3. Summary of Test Method
-1
copper at the low parts µg L (parts per billion, ppb) level. To
3.1 The candidate paint is applied to cylindrical test speci-
detect and correct for reagent impurities, acceptable analytical
mens. The coated specimens are placed in a tank of substitute
precision standards are necessary. Therefore, the limit of
-1
ocean water where the copper levels are kept below 100 µg L
quantitation (LOQ) for copper in substitute ocean water for the
-1 by circulating the substitute ocean water through a suitable
analytical method shall be 10 µg L (10 ppb) or less. The
filtration system (see 5.3). At specified intervals, each speci-
procedure for determining the LOQ for copper in substitute
men is placed in 1500 mL of substitute ocean water (see
ocean water for the analytical method is found in Annex A2.
Section 9 for details) and rotated at 60 revolutions per minute
1.3 A suitable method is described in Appendix X1 (graph-
(rpm) for 1 h (or less, see 9.8 for further explanation and
ite furnace atomic absorption spectroscopy, GF-AAS). Other
instruction). The rate of copper release from the paint is
analytical methods may be utilized with relevant procedural
determined by measuring copper concentrations of the substi-
changes,asneeded,toaccommodateselectedspecificmethods.
tute ocean water in the individual measuring containers.
Such methods must meet the limit of quantitation for copper in
-1 3.2 Appendix X1 provides an analytical procedure for
substitute ocean water of 10 µg L (10 ppb) or less. See 1.2.
measuring copper concentrations in substitute ocean water.
1.4 This test method has not been validated to reflect in situ
copper release rates for antifouling products and, therefore
4. Significance and Use
should not be used in the process of generating environmental
4.1 This test method is designed to provide a laboratory
risk assessments. In-service release rates of antifouling (AF)
procedure to measure changes in the release rates of copper
coatings change with natural variability in seawater chemistry,
that occur during a period of immersion under specified
temperature, and hydrodynamic regime.
conditions of constant temperature, pH, salinity, and low
1.5 The values stated in SI units are to be regarded as the
copper concentrations in the surrounding substitute ocean
standard. The values given in parentheses are for information
water. Quantitative measurement of the release rate is neces-
only.
sary to help in selection of materials, in providing quality
1.6 This standard does not purport to address all of the
control, and in understanding the performance mechanism.
safety concerns, if any, associated with its use. It is the
4.2 This test method serves only as a guide for character-
ization of the early release pattern as well as estimating the
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
2
and Related Coatings, Materials, andApplications and is the direct responsibility of For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Subcommittee D01.45 on Marine Coatings. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved July 1, 2005. Publishe
...

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