ASTM D1649-01(2019)

Standard Specification for Strontium Chromate Pigment

ABSTRACT
This specification covers strontium chromate pigment for use in the manufacture of protective or decorative coatings. The pigment shall be commercially pure strontium chromate and free from extenders and organic materials. Mass color, tint character, and tinting strength shall be within the limits of the standard. The pigment shall be tested for chemical analysis and water content.
SCOPE
1.1 This specification covers the pigment commercially known as strontium chromate which is suitable for use in the manufacture of protective or decorative coatings.  
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 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
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.31 - Pigment Specifications

Relations

• Replaces: ASTM D1649-01(2012) - Standard Specification for Strontium Chromate Pigment
• Effective Date: 01-Oct-2019
• Refers: ASTM D1845-86(2020) - Standard Test Methods for Chemical Analysis of Strontium Chromate Pigment
• Effective Date: 01-Jun-2020
• Refers: ASTM D1208-96(2019) - Standard Test Methods for Common Properties of Certain Pigments
• Effective Date: 01-Jun-2019
• Refers: ASTM D1845-86(2014) - Standard Test Methods for Chemical Analysis of Strontium Chromate Pigment
• Effective Date: 01-Dec-2014
• Refers: ASTM D1208-96(2012) - Standard Test Methods for Common Properties of Certain Pigments
• Effective Date: 01-Nov-2012
• Refers: ASTM D387-00(2008) - Standard Test Method for Color and Strength of Chromatic Pigments with a Mechanical Muller
• Effective Date: 01-Feb-2008
• Refers: ASTM D1845-86(2008) - Standard Test Methods for Chemical Analysis of Strontium Chromate Pigment
• Effective Date: 01-Feb-2008
• Refers: ASTM D1208-96(2007) - Standard Test Methods for Common Properties of Certain Pigments
• Effective Date: 01-Jun-2007
• Refers: ASTM D1845-86(2003) - Standard Test Methods for Chemical Analysis of Strontium Chromate Pigment
• Effective Date: 01-Dec-2003
• Refers: ASTM D387-00 - Standard Test Method for Color and Strength of Chromatic Pigments with a Mechanical Muller
• Effective Date: 10-Jun-2000
• Refers: ASTM D1845-86(1999) - Standard Test Methods for Chemical Analysis of Strontium Chromate Pigment
• Effective Date: 10-Jul-1999
• Refers: ASTM D1208-96(2002) - Standard Test Methods for Common Properties of Certain Pigments
• Effective Date: 10-Nov-1996
• Refers: ASTM D1208-96 - Standard Test Methods for Common Properties of Certain Pigments
• Effective Date: 10-Nov-1996

Overview

ASTM D1649-01(2019) is the internationally recognized Standard Specification for Strontium Chromate Pigment, published by ASTM International. This specification sets the criteria for the composition, purity, and performance characteristics of strontium chromate pigment intended for use in protective and decorative coatings. The standard ensures that strontium chromate produced for industrial use meets stringent requirements regarding purity, particle size, color characteristics, and chemical composition. Following the principles of the World Trade Organization Technical Barriers to Trade (TBT) Committee, this standard supports global uniformity and trade.

Key Topics

• Material Purity: The pigment must be commercially pure strontium chromate, free from extenders and organic materials, ensuring high performance in applications.
• Chemical Composition: Minimum percentages of strontium and chromium, and strict limits on chlorides, sulfates, and water content, are specified for product quality and consistency.
• Physical Properties: Requirements include mass color, tint character, tinting strength, and maximum allowable residue on a fine 45-μm sieve, ensuring predictability in final coatings.
• Testing and Sampling: Clear protocols are established for sampling batches and for the chemical analysis of pigment purity and water content, leveraging referenced ASTM test methods.
• Quality Assurance and Mutual Agreement: The color and tinting properties must meet mutually agreed upon standards between the purchaser and the seller, promoting flexibility in application while maintaining quality.

Applications

Strontium chromate pigment is widely used for its exceptional properties as a pigment and corrosion inhibitor in specialized coatings, such as:

• Protective coatings: Offers excellent corrosion resistance, making it a reliable choice for use in industrial, automotive, and aerospace protective paints.
• Decorative coatings: Ensures vibrant color and long-lasting tint in a wide range of decorative applications, especially where yellow pigmentation is desired.
• Metal surface primers: Used as a key ingredient in primers for aluminum and other metals, enhancing adhesion and durability.
• Industrial paint systems: Incorporated in heavy-duty paint systems where resistance to harsh environments is critical.

By adhering to ASTM D1649, manufacturers and specifiers can be confident in the reliability, safety, and performance of strontium chromate-based products.

Related Standards

• ASTM D387: Test Method for Color and Strength of Chromatic Pigments with a Mechanical Muller
• ASTM D1208: Test Methods for Common Properties of Certain Pigments
• ASTM D1845: Test Methods for Chemical Analysis of Strontium Chromate Pigment

These related ASTM standards provide the necessary test methods and analytical procedures to ensure compliance with ASTM D1649-01(2019) requirements.

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Adherence to ASTM D1649-01(2019) not only assures product quality and safety but also supports international commerce and best practices in the use of strontium chromate pigment for coatings and related applications. For further details and access to these standards, consult the ASTM website or contact ASTM International.

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: D1649 −01 (Reapproved 2019)
Standard Specification for
Strontium Chromate Pigment
This standard is issued under the fixed designation D1649; 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 which the pigment is used. The pigment shall conform to the
following requirements:
1.1 This specification covers the pigment commercially
percent
known as strontium chromate which is suitable for use in the
manufacture of protective or decorative coatings.
Strontium as SrO, min 48
Chromium as CrO ,min 47
1.2 The values stated in SI units are to be regarded as the
Chloride as Cl, max 0.1
standard. The values given in parentheses are for information
Sulfate as SO , max 0.2
Water content, max 0.2
only.
Coarse particles (total residue retained on No. 1.0
1.3 This international standard was developed in accor-
325 (45-µm) sieve), max
dance with internationally recognized principles on standard-
3.2 The mass color and character of the tint and tinting
ization established in the Decision on Principles for the
strength formed by a mixture with a white pigment shall be
Development of International Standards, Guides and Recom-
within mutually agreed upon limits of a standard acceptable to
mendations issued by the World Trade Organization Technical
both the purchaser and the seller when tested in accordance
Barriers to Trade (TBT) Committee.
with Test Method D387.
2. Referenced Documents
4. Sampling
2.1 ASTM Standards:
4.1 Two samples shall be taken at random from different
D387 Test Method for Color and Strength of Chromatic
packages from each lot, batch, day’s pack, or other unit of
Pigments with a Mechanical Muller
production in a shipment. When no markings distinguishing
D1208 Test Methods for Common Properties of Certain
between units of production appear, samples shall be taken
Pigments
from different packages in the ratio of two samples for each
D1845 Test Methods for Chemical Analysis of Strontium
4540 kg or 10 000 lb, except that for shipments of less than 10
Chromate Pigment
000 lb, two samples shall be taken. At the option of the
purchaser, the samples may be tested separately or after
3. Composition and Properties
blending in equal quantities the samples from the same
3.1 Dry Pigment—The pigment shall be commercially pure
production unit to form a composite
...