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Last Updated: Jan 13, 2022
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ASTM D4938-89(2013)
Standard Test Method for Erosion Testing of Antifouling Paints Using High Velocity Water (Withdrawn 2022)
Standard Test Method for Erosion Testing of Antifouling Paints Using High Velocity Water (Withdrawn 2022)
D4938-89R13
ASTM|D4938-89R13|en-US
Standard Test Method for Erosion Testing of Antifouling Paints Using High Velocity Water (Withdrawn 2022)
Standard
D4938 Standard Test Method for Erosion Testing of Antifouling Paints Using High Velocity Water (Withdrawn 2022)>
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Significance and Use
4.1 This test method is intended to measure the erosion rates of ablative antifouling paint systems exposed to flowing water at velocities designed to subject the paint system to shear stresses experienced in service.
4.2 Measurement of erosion rates are necessary to help in the assessment of ablative antifouling paint film thicknesses required for fouling control between scheduled drydockings of ships, in the selection of materials, in producing quality assurance, and in understanding the performance mechanism.
4.3 The test data is intended to serve as a guide for predicting the service life of ablative antifouling paints in order to calculate the necessary paint thickness to fit specified deployment cycles. Erosion rates of antifouling paints in service will vary depending on such factors as: berthing location, geographic area of operation, salinity, pH, and temperature of seawater. It should also be recognized that some areas of the ship are subject to different erosion rates.
Scope
1.1 This test method covers the determination of erosion rates for marine antifouling paint systems immersed in flowing natural seawater.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 and health practices and determine the applicability of regulatory limitations prior to use. For a specific hazard statement, see Section 7.