ASTM D478-02(2012)
(Specification)Standard Specification for Zinc Yellow (Zinc Chromate) Pigments
Standard Specification for Zinc Yellow (Zinc Chromate) Pigments
SIGNIFICANCE AND USE
3.1 Zinc yellow is used in rust-inhibiting protective coatings and metal primers for ferrous and non-ferrous metals.
SCOPE
1.1 This specification covers the pigments commercially known as zinc yellow (zinc chromate).
1.2 Two types are included:
1.2.1 Type I—High-purity, low sulfate and chloride content.
1.2.2 Type II—Regular grade.
1.3 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D478 −02 (Reapproved 2012)
Standard Specification for
Zinc Yellow (Zinc Chromate) Pigments
This standard is issued under the fixed designation D478; 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. Composition and Properties
4.1 Dry Pigment—The pigment shall be a reaction precipi-
1.1 This specification covers the pigments commercially
tate of soluble chromates and a suitable zinc compound and
known as zinc yellow (zinc chromate).
shall be free of extenders, carbonates, and organic color in any
1.2 Two types are included:
form. The pigment shall conform to the requirements for
1.2.1 Type I—High-purity, low sulfate and chloride content.
composition prescribed in Table 1.
1.2.2 Type II—Regular grade.
4.2 The mass color and character of the tint and the tinting
1.3 The values stated in SI units are to be regarded as
strength formed by a mixture with a white pigment shall be
standard. The values given in parentheses are for information
within mutually agreed upon limits of a standard acceptable to
only.
both the purchaser and the seller.
5. Sampling
2. Referenced Documents
5.1 Two samples shall be taken at random from different
2.1 ASTM Standards:
packages from each lot, batch, day’s pack, or other unit of
D185 Test Methods for Coarse Particles in Pigments
production in a shipment. When no markings distinguishing
D387 Test Method for Color and Strength of Chromatic
between units of production appear, samples shall be taken
Pigments with a Mechanical Muller
from different packages in the ratio of two samples for each
D444 Test Methods for Chemical Analysis of Zinc Yellow
4545 kg (10 000 lb), except that for shipments of less than
Pigment (Zinc Chromate Yellow)
10 000 lb two samples shall be taken. At the option of the
purchaser, the samples may be tested separately or after
3. Significance and Use
blending in equal quantities the samples from the same
production unit to form a composite sample.
3.1 Zinc yellow is used in rust-inhibiting protective coatings
and metal primers for ferrous and non-ferrous metals.
6. Test Methods
6.1 Tests shall be conducted in accordance with the follow-
ing ASTM test methods:
This specification is under the jurisdiction of ASTM Committee D01 on Paint
6.2 Chemical Analysis—Test Methods D444.
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.31 on Pigment Specifications.
6.3 Coarse Particles—Test Methods D185.
Current edition approved June 1, 2012. Published August 2012. Originally
approved in 1938. Last previous edition approved in 2006 as D478 – 02 (2006). 6.4 Mass Color and Tinting Strength—Test Method D387.
DOI: 10.1520/D0478-0
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