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ASTM D5618-20

(Test Method)

Standard Test Method for Measurement of Barnacle Adhesion Strength in Shear

Standard Test Method for Measurement of Barnacle Adhesion Strength in Shear

SIGNIFICANCE AND USE
4.1 This test method is designed as a screening test in the evaluation of coating systems and other materials designed to resist biofouling attachment.  
4.2 The degree and type of barnacle fouling will vary according to the geographic location of test sites and the time of year when tests are implemented. Surfaces with known barnacle adhesive shear strength should be exposed to provide comparative data.
SCOPE
1.1 This test method covers the measurement of barnacle adhesion in shear to surfaces exposed in the marine environment. It is used to establish the ability of a surface to reduce biofouling adhesion. Surfaces with known barnacle adhesion strengths are included to serve as controls.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Published
Publication Date
31-Aug-2020
ICS
25.220.01 - Surface treatment and coating in general
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

Refers
ASTM D3623-78a(2020) - Standard Test Method for Testing Antifouling Panels in Shallow Submergence
Effective Date
01-Aug-2020
Referred By
ASTM D6990-20 - Standard Practice for Evaluating Biofouling Resistance and Physical Performance of Marine Coating Systems
Effective Date
01-Sep-2020

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ASTM D5618-20 - Standard Test Method for Measurement of Barnacle Adhesion Strength in ShearASTM D5618-20 - Standard Test Method for Measurement of Barnacle Adhesion Strength in Shear
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ASTM D5618-20 - Standard Test Method for Measurement of Barnacle Adhesion Strength in Shear
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5618 − 20
Standard Test Method for
1
Measurement of Barnacle Adhesion Strength in Shear
This standard is issued under the fixed designation D5618; 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 3. Summary of Test Method
3.1 Test surfaces and coatings are immersed in the marine
1.1 This test method covers the measurement of barnacle
environmentaccordingtoTestMethodD3623.Whenbarnacles
adhesion in shear to surfaces exposed in the marine environ-
are observed to have settled on the surface, the strength of
ment. It is used to establish the ability of a surface to reduce
adhesion of individuals is measured. Barnacle adhesive shear
biofouling adhesion. Surfaces with known barnacle adhesion
strength is calculated by dividing the shear force required to
strengths are included to serve as controls.
remove the barnacle by the surface area of the barnacle base
1.2 The values stated in SI units are to be regarded as the
plate. This test method is most suited to small barnacles
standard. The values given in parentheses are for information
(generally with base diameters between 5 to 20 mm).
only.
3.2 The diameter of the barnacle base is measured and an
1.3 This standard does not purport to address all of the
increasing shear force is applied to the base of the barnacle
safety concerns, if any, associated with its use. It is the
until it is removed from the surface.
responsibility of the user of this standard to establish appro-
4. Significance and Use
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use.
4.1 This test method is designed as a screening test in the
1.4 This international standard was developed in accor- evaluation of coating systems and other materials designed to
resist biofouling attachment.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4.2 The degree and type of barnacle fouling will vary
Development of International Standards, Guides and Recom-
according to the geographic location of test sites and the time
mendations issued by the World Trade Organization Technical
of year when tests are implemented. Surfaces with known
Barriers to Trade (TBT) Committee.
barnacle adhesive shear strength should be exposed to provide
comparative data.
2. Referenced Documents
4
5. Interferences
2
2.1 ASTM Standards:
5.1 Variations in barnacle adhesion strength may occur due
D3623 Test Method for Testing Antifouling Panels in Shal-
to differences in species, age, and physical condition.
low Submergence
5.2 Incomplete removal of the barnacle base plate from the
2.2 U.S. Military Specifications:
surface during testing may lead to erroneous adhesion values.
MIL-P-24441/1 Primer, Epoxy (Formula 150, Formula
3
Sheet 24441/1)
5.3 Care must be taken not to dislodge the barnacle during
base diameter measurements.
6. Apparatus
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
6.1 Hand-Held Probe, used to apply force to the barnacle
Subcommittee D01.45 on Marine Coatings.
base. It is recommended that a 14- by 14-mm stainless steel
Current edition approved Sept. 1, 2020. Published September 2020. Originally
plate be attached to the end of a 8-mm diameter stainless steel
approved in 1994. Last previous edition approved in 2011 as D5618 – 94 (2011)
rod that is attached to a force measuring device (see Fig. 1).
which was withdrawn in January 2020 and reinstated in September 2020. DOI:
10.1520/D5618-20.
6.2 Force Measuring Device, maybe a spring scale or force
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
transducer.
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
the ASTM website.
3 4
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Swain, G. W. J., Griffith, J., Bultman, D., and Vincent, H., “ BarnacleAdhesion
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:// Measurements for the Field Evaluation of Candidate Antifouling Surfaces,
dodssp.daps.dla.mil. Biofouling,” Vol 6, 1992, pp. 105–114.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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Test Method for Shrinkage Temperature of Wet Blue and Wet White

SIGNIFICANCE AND USE
5.1 This test method is designed to determine the temperature at which the Wet Blue or Wet White specimen experiences shrinkage. In this test method, shrinkage occurs as a result of hydrothermal denaturation of the collagen protein molecules which make up the fiber structure of the Wet Blue or Wet White. The shrinkage temperature of Wet Blue or Wet White is influenced by many different factors, most of which appear to affect the number and nature of crosslinking interactions between adjacent polypeptide chains of the collagen protein molecules. The value of the shrinkage temperature of Wet Blue or Wet White is commonly used as an indicator of the type of tannage or the degree of tannage, or both, of that particular Wet Blue or Wet White (especially for the more hydrothermally stable tannages such as chrome tannage).
SCOPE
1.1 This test method covers the determination of the shrinkage temperature of all types of Wet Blue and Wet White. The heating medium is water when the shrinkage temperature is at or below 98 °C. The heating medium is a glycerine-water solution when the shrinkage temperature is above 98 °C.  
1.2 The values stated in SI units are to be regarded as the standard. The values in parentheses are for information only.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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