ASTM D662-93(2019)
(Test Method)Standard Test Method for Evaluating Degree of Erosion of Exterior Paints
Standard Test Method for Evaluating Degree of Erosion of Exterior Paints
SIGNIFICANCE AND USE
4.1 Erosion failure of paint films can occur in use. This test method provides a mean of evaluating the degree of failure by comparing to pictorial standards.
SCOPE
1.1 This test method covers the evaluation of the degree of erosion of exterior paints by comparison with photographic standards.
1.2 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
- 30-Sep-2019
- Technical Committee
- D01 - Paint and Related Coatings, Materials, and Applications
- Drafting Committee
- D01.25 - Evaluation of Weathering Effects
Relations
- Replaces
ASTM D662-93(2011) - Standard Test Method for Evaluating Degree of Erosion of Exterior Paints - Effective Date
- 01-Oct-2019
- Refers
ASTM D4214-23 - Standard Test Methods for Evaluating the Degree of Chalking of Exterior Paint Films - Effective Date
- 01-Oct-2023
- Effective Date
- 01-Jun-2015
- Refers
ASTM D4214-07 - Standard Test Methods for Evaluating the Degree of Chalking of Exterior Paint Films - Effective Date
- 01-Jul-2007
- Effective Date
- 10-Aug-1998
- Effective Date
- 01-Oct-2019
- Referred By
ASTM D6763-16(2022) - Standard Guide for Testing Exterior Wood Stains and Clear Water Repellents - Effective Date
- 01-Oct-2019
- Effective Date
- 01-Oct-2019
- Effective Date
- 01-Oct-2019
- Effective Date
- 01-Oct-2019
- Effective Date
- 01-Oct-2019
- Effective Date
- 01-Oct-2019
- Effective Date
- 01-Oct-2019
- Effective Date
- 01-Oct-2019
- Effective Date
- 01-Oct-2019
Overview
ASTM D662-93(2019): Standard Test Method for Evaluating Degree of Erosion of Exterior Paints is a widely recognized international standard established by ASTM International. This standard defines a consistent approach for assessing the degree of erosion in exterior paint films by comparing tested surfaces to photographic reference standards. Designed to assist professionals in industries such as construction, coatings manufacturing, and maintenance, ASTM D662-93(2019) contributes to improved quality control, durability assessment, and maintenance scheduling for protective paint coatings.
Key Topics
- Erosion Evaluation: The standard outlines a method to evaluate erosion by direct visual comparison of exterior paint films with established photographic reference standards, ensuring uniform assessment procedures.
- Photographic Reference Standards: Accurate assessment depends on comparing affected surfaces to high-quality pictorial standards, primarily found in the Pictorial Standards of Coating Defects Handbook.
- Types of Erosion: The test identifies erosion as the wearing away of paint exposing the substrate or undercoat, often as a result of chalking-another form of weathering.
- Assessment Procedures:
- Evaluate an average portion of the surface to account for variable wear.
- Use several locations for larger surfaces and report both mean and range.
- Exercise care to distinguish erosion from other types of coating failure.
- Damp vs. dry evaluation may be considered, as erosion can be more visible on a damp surface.
- Data Recording: Results should be recorded using standardized forms agreed upon between involved parties to ensure consistent communication.
Applications
ASTM D662-93(2019) is essential in various settings where the long-term performance of exterior paint is critical:
- Quality Control in Manufacturing: Paint and coatings manufacturers use this method to routinely assess the resistance of products to environmental erosion, supporting product development and batch quality verification.
- Construction & Facility Maintenance: Building managers and maintenance teams rely on this standard to evaluate the remaining life of exterior coatings, schedule repainting, and ensure substrate protection.
- Comparative Performance Studies: Researchers and product testers apply ASTM D662-93(2019) to compare the durability of various paint formulations under natural or accelerated weathering conditions.
- Compliance & Contracts: The method serves as an objective reference in project specifications, warranty assessments, and contractual obligations involving painted substrates.
Related Standards
For comprehensive paint and coating evaluation, ASTM D662-93(2019) is often used alongside related standards:
- ASTM D4214: Test methods for evaluating the degree of chalking of exterior paint films, which is closely linked to the erosion process.
- Pictorial Standards of Coating Defects Handbook: Provides primary photographic standards for accurate erosion assessment.
- Additional ASTM Paint and Coating Standards: Referenced for broader testing protocols and material comparisons.
Practical Value
Adopting ASTM D662-93(2019) ensures that the assessment of exterior paint erosion is repeatable, objective, and aligned with internationally recognized principles, including the WTO Technical Barriers to Trade (TBT) Committee guidelines. This not only supports compliance with regulatory requirements but also enhances the reliability of maintenance schedules and the performance of coated surfaces across diverse industry applications.
Keywords: ASTM D662, erosion evaluation, exterior paint failure, paint coatings, photographic reference standards, quality control, maintenance, international standard
Frequently Asked Questions
ASTM D662-93(2019) is a standard published by ASTM International. Its full title is "Standard Test Method for Evaluating Degree of Erosion of Exterior Paints". This standard covers: SIGNIFICANCE AND USE 4.1 Erosion failure of paint films can occur in use. This test method provides a mean of evaluating the degree of failure by comparing to pictorial standards. SCOPE 1.1 This test method covers the evaluation of the degree of erosion of exterior paints by comparison with photographic standards. 1.2 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.
SIGNIFICANCE AND USE 4.1 Erosion failure of paint films can occur in use. This test method provides a mean of evaluating the degree of failure by comparing to pictorial standards. SCOPE 1.1 This test method covers the evaluation of the degree of erosion of exterior paints by comparison with photographic standards. 1.2 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.
ASTM D662-93(2019) is classified under the following ICS (International Classification for Standards) categories: 87.040 - Paints and varnishes. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM D662-93(2019) has the following relationships with other standards: It is inter standard links to ASTM D662-93(2011), ASTM D4214-23, ASTM D4214-07(2015), ASTM D4214-07, ASTM D4214-98, ASTM D5146-10(2019), ASTM D6763-16(2022), ASTM D6577-15(2019), ASTM D5722-20, ASTM D3451-06(2017), ASTM D4587-23, ASTM D7254-21, ASTM D333-01(2021), ASTM D7856-21, ASTM D1014-18. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM D662-93(2019) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
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: D662 − 93 (Reapproved 2019)
Standard Test Method for
Evaluating Degree of Erosion of Exterior Paints
This standard is issued under the fixed designation D662; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 4. Significance and Use
1.1 This test method covers the evaluation of the degree of
4.1 Erosion failure of paint films can occur in use. This test
erosion of exterior paints by comparison with photographic method provides a mean of evaluating the degree of failure by
standards.
comparing to pictorial standards.
1.2 This international standard was developed in accor-
5. Types of Erosion
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5.1 Only one type of erosion is recognized, as defined in
Development of International Standards, Guides and Recom-
Section 3.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
6. Use of Photographic Reference Standards
6.1 The photographic reference standards that are part of
2. Referenced Documents
this test method and are provided in the Pictorial Standards of
2.1 ASTM Standards:
Coating Defects Handbook are representative of the degree of
D4214 Test Methods for Evaluating the Degree of Chalking
erosion of exterior paint films. Fig. 1 is for illustration purposes
of Exterior Paint Films
only and should not be used for evaluation.
2.2 Other Standards:
6.2 The use of the photographic reference standards illus-
Pictorial Standards of Coating Defects Handbook
trated in Fig. 1 requires the following precautions:
6.2.1 Care must be taken not to confuse various types of
3. Terminology
failure that may be present on the same surface.
3.1 Definitions of Terms Specific to This Standard:
6.2.2 It must be realized that the degree of failure will vary
3.1.1 erosion,n—thatphenomenonmanifestedinpaintfilms
over any given area. Therefore, an average portion of the film
by the wearing away of the finish to expose the substrate or
should be used for comparison. On larger surfaces it is
undercoat.
recommended that ratings be made at several locations and the
3.1.1.1 Discussion—The degree of failure is dependent on
mean and range reported.
the amount of substrate or undercoat visible. Erosion occurs as
6.2.3 The photographic standards used represent various
the result of chalking. (See Test Methods D4214 for evaluation
degrees of erosion of a white brushing type paint over a dark
of chalking.)
primer. This system was necessary to provide sufficient con-
trast for photographic purposes. The erosion of a film to its
normal substrate is, however, readily visible to the naked eye
This test method is under the jurisdiction of ASTM Committee D01 on Paint
so it may easily be compared to the standards and given a
and Related Coatings, Materials, andApplic
...
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