ASTM D1978-91(1996)
(Guide)Standard Guide for Analysis of Electrocoat Bath Samples
Standard Guide for Analysis of Electrocoat Bath Samples
SCOPE
1.1 This guide covers the selection of test methods for determination of the important parameters that affect the performance of electrocoating paints.
1.2 The test methods involved are D4370, D4399, D4584, and D5145.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 1978 – 91 (Reapproved 1996)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Guide for
Analysis of Electrocoat Bath Samples
This standard is issued under the fixed designation D 1978; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope must be adjusted when deviations from the norm occur.
3.2 The test methods for electrocoat baths are unique, as the
1.1 This guide covers the selection of test methods for
aqueous samples have a nonvolatile content between 8 and
determination of the important parameters that affect the
25 %. Constant agitation must be present when the samples are
performance of electrocoating paints.
taken and during the measurement of some of the parameters.
1.2 The test methods involved are D 4370, D 4399, D 4584,
and D 5145.
4. Test Methods
2. Referenced Documents 4.1 Acid and Base Content—Test Methods D 4370 covers
the determination of acid and base milliequivalent content of
2.1 ASTM Standards:
electrocoat baths.
D 4370 Test Methods for Acid and Base Milliequivalent
2 4.2 Electrical Conductivity—Test Method D 4399 describes
Content of Electrocoat Bath Samples
the determination of the electrical conductivity of electrocoat
D 4399 Test Method for Measuring Electrical Conductivity
2 baths.
of Electrocoat Baths
4.3 pH Determination—Test Method D 4584 describes the
D 4584 Test Method for Measuring Apparent pH of Elec-
2 measurement of the apparent pH of paints and ultrafiltrates of
trocoat Baths
electrocoat baths.
D 5145 Test Method for Nonvolatile and Pigment Content
...
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1.1 These test methods cover procedures for sampling and testing solvent bearing bituminous compounds for use in roofing and waterproofing.
1.2 The test methods appear in the following order:
Section
Sampling
4
Uniformity
5
Weight per gallon
6
Nonvolatile content
7
Solubility
8
Ash content
9
Water content
10
Consistency
11
Behavior at 60 °C [140 °F]
12
Pliability at –0 °C [32 °F]
13
Aluminum content
14
Reflectance of aluminum roof coatings
15
Strength of laps of rolled roofing adhered with roof adhesive
16
Adhesion to damp, wet, or underwater surfaces
17
Mineral stabilizers and bitumen
18
Mineral matter
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Volatile organic content
20
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FIG. 1 Bored Forgings
Note 1: Sensitivity multiplication factor such that a 10 % indication at the forging bore surface will be equivalent to a 1/8 in. [3 mm] diameter flat bottom hole. Inspection frequency: 2.0 MHz or 2.25 MHz. Material velocity: 2.30 in./s × 105 in./s [5.85 cm/s × 105 cm/s].
FIG. 2 Solid Forgings
Note 1: Sensitivity multiplication factor such that a 10 % indication at the forging centerline surface will be equivalent to a 1/8 in. [3 mm] diameter flat bottom hole. Inspection frequency: 2.0 MHz or 2.25 MHz. Material velocity: 2.30 in./s × 105 in./s [5.85 cm/s × 105 cm/s].
FIG. 3 Conversion Factors to Be Used in Conjunction with Fig. 1 and Fig. 2 if a Change in the Reference Reflector Diameter is Required
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