ASTM D4462-02(2019)

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:D4462 −02 (Reapproved 2019)
Standard Specification for
Zinc Hydroxy Phosphite Pigment
This standard is issued under the fixed designation D4462; 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 3.2 The mass color of the dry pigment is white. The shade
and tinting strength, when specified, shall be within mutually
1.1 This specification covers a zinc hydroxy phosphite
agreed upon limits of a reference sample acceptable by the
pigment having the general formula
purchaser and the seller as tested in an agreed test procedure.
ZnHPO ·[ZnO·2Zn(OH) ].
3 2
1.2 This international standard was developed in accor-
4. Sampling
dance with internationally recognized principles on standard-
4.1 Two samples shall be taken at random from different
ization established in the Decision on Principles for the
packages from each lot, batch, day’s pack, or other unit of
Development of International Standards, Guides and Recom-
production in a shipment. When no markings distinguishing
mendations issued by the World Trade Organization Technical
between units of production appear, samples shall be taken
Barriers to Trade (TBT) Committee.
from different packages, in the ratio of two samples for each
10 000 lb (4545 kg), except that for shipments of less than
2. Referenced Documents
10 000 lb two samples shall be taken. At the option of the
2.1 ASTM Standards:
purchaser, the samples may be tested separately or after
D185 Test Methods for Coarse Particles in Pigments
blending in equal quantities the samples from the same
D280 Test Methods for Hygroscopic Moisture (and Other
production unit to form a composite sample.
Matter Volatile Under the Test Conditions) in Pigments
D281 Test Method for Oil Absorption of Pigments by 5. Test Methods
Spatula Rub-out
5.1 Tests shall be conducted in accordance with the follow-
D4450 Test Method forAnalysis of Zinc Hydroxy Phosphite
ingASTMtestmethods.TestproceduresnotcoveredbyASTM
Pigment
test methods shall be mutually agreed upon between the
purchaser and the seller.
3. Composition and Properties
5.2 Chemical Analysis—Test Method D4450.
3.1 The pigment shall consist of zinc hydroxy phosphite and
5.3 Moisture Loss—Determine the hygroscopic moisture
shall conform to the requirements in Table 1.
loss by Method A of Test Methods D280.
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