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  • ASTM
    D4938-89(2013) Standard Test Method for Erosion Testing of Antifouling Paints Using High Velocity Water
    Edition: 2013
    $91.10
    Unlimited Users per year

Description of ASTM-D4938 2013

ASTM D4938 - 89(2013)

Standard Test Method for Erosion Testing of Antifouling Paints Using High Velocity Water

Active Standard ASTM D4938 | Developed by Subcommittee: D01.45

Book of Standards Volume: 06.02




ASTM D4938

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.

4.4 The degree of correlation between results obtained from this test method and shipboard service has not been determined.

1. 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 .


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

U.S. Military Specifications

DOD-P-24647 Paint, Antifouling, Ship Hull (Metric) DOD-P-24655 Paint, Underwater Hull, Anticorrosion (Metric) MIL-P-24441 Paint, Epoxy-Polyamide

ASTM Standards

A569/A569M Specification for Steel, Carbon (0.15 Maximum, Percent), Hot-Rolled Sheet and Strip Commercial

D823 Practices for Producing Films of Uniform Thickness of Paint, Varnish, and Related Products on Test Panels

D1889 Test Method for Turbidity of Water

D2200 Practice for Use of Pictorial Surface Preparation Standards and Guides for Painting Steel Surfaces


Keywords

antifouling paints; erosion testing; high velocity water; seawater;


ICS Code

ICS Number Code 47.020.05 (Materials and components for shipbuilding)


DOI: 10.1520/D4938

ASTM International is a member of CrossRef.

ASTM D4938

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About ASTM

ASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide.
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