||Input Sought for Evaluation of Antifouling Coatings for Marine
Chemical antifouling coatings are applied to the hulls of ships
to control marine-life growth. ASTM Subcommittee D01.45 on Marine
Coatings seeks input from stakeholders as they develop standards
for these coatings.
Antifouling coating technology is in a state of transition,
said Subcommittee Chairman Elizabeth Haslbeck, a materials scientist
with Naval Surface Warfare Center, Md. Environmental regulations
are driving the technology to more benign, non-toxic approaches.
On a global scale, the International Maritime Organization (IMO)
is currently considering a worldwide ban on the use of the very
effective organotin compounds. Even the most widely used active
agent, copper, is coming under scrutiny and limitations are being
placed on its use in some countries including Canada and Sweden.
New, environmentally friendly, coating formulations and concepts
are continually being introduced, she explained, in hopes of
matching or exceeding the effective formulations that have been
on the market for decades. Some of the newer formulations are
based on non-toxic technologies, some on toxic but non-persistent
or reduced-toxicity biocides. This transition to new coating technologies
is prompting a new look at marine-coating evaluation protocols,
techniques, and standards.
Eleven ASTM standards address antifouling, such as D 6442, Standard Test Method for Copper Release Rates of Antifouling
Coating Systems in Seawater (approved in 1999) and D 5618, Standard Test Method for Measurement of Barnacle Adhesion Strength
in Shear (reapproved in 2000).
ASTM D01.45 [is] in the process of developing standards for determination
of biocide release rates, introducing revised methods for the
field evaluation of coatings for the control of biofouling accumulation,
and creating new methods for the determination of biocide in liquid
paint, continued Haslbeck. Standards, guides, and methods for
other aspects of marine coatings are continually being considered.
If you have an interest in this area, our subcommittee would like
your input, ideas, and contributions.
Contact Elizabeth Haslbeck, Naval Surface Warfare Center, West Bethesda, Md. (phone: 301/227-4784).
ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications meets
June 10-13, Pittsburgh, Pa. For further information about meetings
or membership, contact Staff Manager Tim Brooke, ASTM (phone: 610/832-9729). //
Copyright 2001, ASTM