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ASTM D4399-05(2011)

(Test Method)

Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths

Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths

SIGNIFICANCE AND USE
The conductivity of electrocoat baths results from the presence of ionic species in the bath, which come from the vehicle and from the presence of impurities present as ionizable acids, bases, salts, or combinations of these. The presence of excessive amounts of ionic impurities is detrimental to the application and performance properties of electrocoating paints. The test is suitable for use in research, production, quality control and electrocoat bath process control.
Other related methods for determining the electrical conductivity of water are described in Test Methods D1125.
SCOPE
1.1 This test method covers the determination of the electrical conductivity of electrocoat baths or ultrafiltrate samples using commercially available equipment.
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 standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-May-2011
ICS
25.220.40 - Metallic coatings
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.21 - Chemical Analysis of Paints and Paint Materials
Current Stage
Ref Project

Relations

Replaces
ASTM D4399-05e1 - Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths
Effective Date
01-Jun-2011
Referred By
ASTM D1978-91(2018) - Standard Guide for Analysis of Electrocoat Bath Samples
Effective Date
01-Jun-2011

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ASTM D4399-05(2011) - Standard Test Method for Measuring Electrical Conductivity of Electrocoat BathsASTM D4399-05(2011) - Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths
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ASTM D4399-05(2011) - Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D4399 − 05 (Reapproved 2011)
Standard Test Method for
Measuring Electrical Conductivity of Electrocoat Baths
This standard is issued under the fixed designation D4399; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope paints. The test is suitable for use in research, production,
quality control and electrocoat bath process control.
1.1 This test method covers the determination of the elec-
trical conductivity of electrocoat baths or ultrafiltrate samples
4.2 Other related methods for determining the electrical
using commercially available equipment.
conductivity of water are described in Test Methods D1125.
1.2 The values stated in SI units are to be regarded as
5. Apparatus
standard. No other units of measurement are included in this
standard.
5.1 Conductivity Bridge—Battery, or AC/DC line-operated,
1.3 This standard does not purport to address all of the capable of providing a conductivity reading almost instanta-
safety concerns, if any, associated with its use. It is the neously.
responsibility of the user of this standard to establish appro-
5.2 Conductivity Cell—Dip or fill type, cell constant of 1.0.
priate safety and health practices and determine the applica-
5.3 Thermometer—Any type capable of 0.5°C accuracy
bility of regulatory limitations prior to use.
with a−2 to 32°C range.
2. Referenced Documents
5.4 Measuring Vessel—Any suitable cylindrical container
2.1 ASTM Standards:
capable of holding sufficient electrocoat sample to cover the
D1125Test Methods for Electrical Conductivity and Resis-
electrodesoftheconductivitycell,andallowingatleast25mm
tivity of Water
between the conductivity cell and the sides of the vessel.
D1193Specification for Reagent Water
6. Reagents and Materials
3. Summary of Test Method
6.1 Purity of Water—References to water shall be under-
3.1 A specimen is placed in a conductivity cell, or con-
stood to mean water conforming to Type II of Specification
versely a conductivity cell is placed in an electrocoat material,
D1193.
and the cell is connected to a conductivity bridge. The
electrical conductivity is read directly off the meter of the 6.2 Cleaning Solvent—An appropriate solvent for the elec-
bridge as the instantaneous peak reading. trocoat material under measurement.
4. Significance and Use
7. Sampling and Sample Preparation
4.1 The conductivity of electrocoat baths results from the
7.1 The sample should be obtained while the electrocoat
presence of ionic species in the bath, which come from the
bath is under proper circulation so that a uniform sample is
vehicle and from the presence of impurities present as ioniz-
obtained. In the case of an ultrafiltrate, the material should be
able acids, bases, salts, or combinations of these.The presence
thoroughly mixed or stirred prior to sampling to ensure
of excessive amounts of ionic impurities is detrimental to the
uniformity.
application and performance properties of electrocoating
7.2 After sampling and prior to removing a test specimen, it
ismandatorythatthesamplesbeshakenorstirreduntiltheyare
This test method is under the jurisdiction of ASTM Committee D01 on Paint
homogeneous and free of any settled material. This is particu-
and Related Coatings, Materials, andApplications and is the direct responsibility of
larly important if there is a delay between sampling the bath
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.
and performing the test on the bath materials. The absence of
Current edition approved June 1, 2011. Published June 2011. Originally
ε1
settled material can be ascertained visually (in a transparent
approved in 1984. Last previous edition approved in 2005 as D4399–05 . DOI:
10.1520/D4399-05R11.
container) or by inserting a spatula, scraping the bottom of the
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
containerandmakingsurethatthereisnosettledmatter.Shake
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
or stir the sample until specimens are taken for measurement;
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. THIS POINT IS
...

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ABSTRACT
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SCOPE
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