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ASTM D4399-05e1

(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-Dec-2004
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 D4399-05 - Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths
Effective Date
01-Jan-2005
Replaced By
ASTM D4399-05(2011) - 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-Jan-2005

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ASTM D4399-05e1 - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
´1
Designation:D4399–05
Standard Test Method for
1
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
´ NOTE—An editorial correction was made in paragraph 8.6 in March 2010.
1. Scope of excessive amounts of ionic impurities is detrimental to the
application and performance properties of electrocoating
1.1 This test method covers the determination of the elec-
paints. The test is suitable for use in research, production,
trical conductivity of electrocoat baths or ultrafiltrate samples
quality control and electrocoat bath process control.
using commercially available equipment.
4.2 Other related methods for determining the electrical
1.2 The values stated in SI units are to be regarded as the
conductivity of water are described in Test Methods D1125.
standard. The values given in parentheses are for information
only.
5. Apparatus
1.3 This standard does not purport to address all of the
5.1 Conductivity Bridge—Battery, orAC/DC line-operated,
safety concerns, if any, associated with its use. It is the
capable of providing a conductivity reading almost instanta-
responsibility of the user of this standard to establish appro-
neously.
priate safety and health practices and determine the applica-
5.2 Conductivity Cell—Dip or fill type, cell constant of 1.0.
bility of regulatory limitations prior to use.
5.3 Thermometer—Any type capable of 0.5°C accuracy
2. Referenced Documents with a−2 to 32°C range.
2
5.4 Measuring Vessel—Any suitable cylindrical container
2.1 ASTM Standards:
capable of holding sufficient electrocoat sample to cover the
D1125 Test Methods for Electrical Conductivity and Resis-
electrodesoftheconductivitycell,andallowingatleast25mm
tivity of Water
between the conductivity cell and the sides of the vessel.
D1193 Specification 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
6.2 Cleaning Solvent—An appropriate solvent for the elec-
electrical conductivity is read directly off the meter of the
trocoat material under measurement.
bridge as the instantaneous peak reading.
7. Sampling and Sample Preparation
4. Significance and Use
7.1 The sample should be obtained while the electrocoat
4.1 The conductivity of electrocoat baths results from the
bath is under proper circulation so that a uniform sample is
presence of ionic species in the bath, which come from the
obtained. In the case of an ultrafiltrate, the material should be
vehicle and from the presence of impurities present as ioniz-
thoroughly mixed or stirred prior to sampling to ensure
able acids, bases, salts, or combinations of these.The presence
uniformity.
7.2 Aftersamplingandpriortoremovingatestspecimen,it
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
ismandatorythatthesamplesbeshakenorstirreduntiltheyare
and Related Coatings, Materials, andApplications and is the direct responsibility of
homogeneous and free of any settled material. This is particu-
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.
larly important if there is a delay between sampling the bath
Current edition approved Jan. 1, 2005. Published February 2005. Originally
approved in 1984. Last previous edition approved in 1999 as D4399–90(1999).
and performing the test on the bath materials. The absence of
DOI: 10.1520/D4399-05E01.
settled material can be ascertained visually (in a transparent
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
container) or by inserting a spatula, scraping the bottom of the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
containerandmakingsurethatthereisnosettledmatter.Shake
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
´1
D4399–05
or stir the sample until specimens are taken for measurement; and do not allow the dry electrocoat sample to accumulate on
THIS POINT IS VERY IMPORTANT. the interior of the cell.
9. Report
8. Procedure
9.1 Report the conductivity in terms of microsiemens (or
8.1 Calib
...

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1.4 Porosity test results (including those for gross defects) occur as chemical reaction end products. Some occur in situ, others on paper, or in a gel coating. Observations are made that are consistent with the test method, the items being tested, and the requirements of the purchaser. These may be visual inspection (unaided eye) or by 10× magnification (microscope). Other methods may involve enlarged photographs or photomicrographs.  
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This specification establishes the requirements for electrodeposited palladium-nickel (Pd-Ni) coatings for engineering applications. Composite coatings consisting of palladium-nickel and a thin gold over-plate for applications involving electrical contacts are also covered. The classification system for the coatings covered here shall be specified by the basis metal, the thickness of the underplating, the composition type and thickness class of the palladium-nickel coating, and the grade of the gold overplating. Coatings should be sampled, tested, and conform to specified requirements as to purity, appearance, thickness, composition, adhesion, ductility, and integrity (including gross defects, mechanical damage, porosity, and microcracks). Alloy composition shall be examined either by wet method, X-ray fluorescence (XRF), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), Auger or electron probe X-ray microanalysis (EPMA), or wavelength dispersive spectroscopy (WDS). Coating adhesion shall be analyzed either by bend, heat, or cutting test.
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Approximate Hardness (HK25)  
Gold  
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Platinum  
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Palladium-Nickel  
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Rhodium  
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Ruthenium  
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1.5 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.

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