Standard Active Last Updated: Jul 14, 2017
ASTM D4399-05(2017)

Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths

Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths
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Significance and Use

4.1 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.

4.2 Other related methods for determining the electrical conductivity of water are described in Test Methods D1125.


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 standard. No other units of measurement are included in this standard.

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.

1.4 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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Book of Standards Volume: 06.01
Developed by Subcommittee: D01.21
Pages: 2
DOI: 10.1520/D4399-05R17
ICS Code: 25.220.40