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ASTM D478-02(2006)

(Specification)

Standard Specification for Zinc Yellow (Zinc Chromate) Pigments

Standard Specification for Zinc Yellow (Zinc Chromate) Pigments

ABSTRACT
This specification covers zinc yellow (zinc chromate) pigments used in rust-inhibiting protective coatings and metal primers for ferrous and non-ferrous metals. The two types of pigments include: Type I and Type II. The pigment shall conform to the required composition for zinc, chromium, sulfates, chlorides, alkaline slats, matter insoluble in acetic acid, moisture and other volatile matter, and coarse particles. The following tests shall be conducted: chemical analysis, coarse particles, and mass color and tinting strength.
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 the standard. The values given in parentheses are for informaiton only.

General Information

Status
Historical
Publication Date
31-Oct-2006
ICS
87.060.10 - Pigments and extenders
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.31 - Pigment Specifications
Current Stage
Ref Project

Relations

Replaces
ASTM D478-02 - Standard Specification for Zinc Yellow (Zinc Chromate) Pigments
Effective Date
01-Nov-2006
Replaced By
ASTM D478-02(2012) - Standard Specification for Zinc Yellow (Zinc Chromate) Pigments
Effective Date
01-Jun-2012
Referred By
ASTM D444-88(2020) - Standard Test Methods for Chemical Analysis of Zinc Yellow Pigment (Zinc Chromate Yellow)
Effective Date
01-Nov-2006

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ASTM D478-02(2006) - Standard Specification for Zinc Yellow (Zinc Chromate) PigmentsASTM D478-02(2006) - Standard Specification for Zinc Yellow (Zinc Chromate) Pigments
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ASTM D478-02(2006) - Standard Specification for Zinc Yellow (Zinc Chromate) Pigments
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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(Reapproved2006)
StandardSpecification 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 Department of Defense.
1. Scope 4. Composition and Properties
1.1 This specification covers the pigments commercially
4.1 Dry Pigment—The pigment shall be a reaction precipi-
known as zinc yellow (zinc chromate).
tate of soluble chromates and a suitable zinc compound and
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.
1.2.2 Type II—Regular grade. composition prescribed in Table 1.
1.3 The values stated in SI units are to be regarded as
4.2 The mass color and character of the tint and the tinting
standard. The values given in parentheses are for information
strength formed by a mixture with a white pigment shall be
only.
within mutually agreed upon limits of a standard acceptable to
both the purchaser and the seller.
2. Referenced Documents
5. Sampling
2.1 ASTM Standards:
D185 Test Methods for Coarse Particles in Pigments
5.1 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
D444 Test Methods for Chemical Analysis of Zinc Yellow
between units of production appear, samples shall be taken
Pigment (Zinc Chromate Yellow)
from different packages in the ratio of two samples for each
4545 kg (10 000 lb), except that for shipments of less than
3. Significance and Use
10 000 lb two samples shall be taken. At the option of the
3.1 Zinc yellow is used in rust-inhibiting protective coatings
purchaser, the samples may be tested separately or after
and metal primers for ferrous and non-ferrous metals.
blending in equal quantities the samples from the same
production unit to form a composite sample.
6. Test Methods
This specification is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
6.1 Tests shall be conducted in accordance with the follow-
Subcommittee D01.31 on Pigment Specifications.
Current edition approved Nov. 1, 2006. Published November 2006. Originally ing ASTM test methods:
approved in 1938. Last previous edition approved in 2002 as D478 – 02. DOI:
10.1520/D0478-02R06.
6.2 Chemical Analysis—Test Methods D444.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service a
...

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ASTM  
Method  
Refer-  
Dry Pigments
Sections  
ences  
Moisture and Other Volatile Matter  
6  
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Moisture and Other Volatile Matter  
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