ASTM D1978-91(2018)

Standard Guide for Analysis of Electrocoat Bath Samples

SIGNIFICANCE AND USE
3.1 This guide indicates test procedures recommended for the maintenance of acceptable performance of the paint in an electrocoating bath. Several critical parameters must be determined throughout the operation of the bath. These parameters must be adjusted when deviations from the norm occur.  
3.2 The test methods for electrocoat baths are unique, as the aqueous samples have a nonvolatile content between 8 and 25 %. Constant agitation must be present when the samples are taken and during the measurement of some of the parameters.
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.  
1.3 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.

General Information

• Status: Published
• Publication Date: 31-May-2018
• ICS: 25.220.20 - Surface treatment
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.21 - Chemical Analysis of Paints and Paint Materials

Relations

• Replaces: ASTM D1978-91(2014) - Standard Guide for Analysis of Electrocoat Bath Samples
• Effective Date: 01-Jun-2018
• Refers: ASTM D4370-01(2012) - Standard Test Methods for Acid and Base Milliequivalent Content of Electrocoat Bath
• Effective Date: 01-Jun-2012
• Refers: ASTM D4399-05(2011) - Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths
• Effective Date: 01-Jun-2011
• Refers: ASTM D4584-05(2010) - Standard Test Method for Measuring Apparent pH of Electrocoat Baths
• Effective Date: 01-Jun-2010
• Refers: ASTM D5145-09 - Standard Test Methods for Nonvolatile and Pigment Content of Electrocoat Baths
• Effective Date: 01-Feb-2009
• Refers: ASTM D4370-01(2006) - Standard Test Methods for Acid and Base Milliequivalent Content of Electrocoat Bath
• Effective Date: 01-Jun-2006
• Refers: ASTM D4399-05 - Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths
• Effective Date: 01-Jan-2005
• Refers: ASTM D4584-05 - Standard Test Method for Measuring Apparent pH of Electrocoat Baths
• Effective Date: 01-Jan-2005
• Refers: ASTM D4399-05e1 - Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths
• Effective Date: 01-Jan-2005
• Refers: ASTM D5145-03 - Standard Test Methods for Nonvolatile and Pigment Content of Electrocoat Baths
• Effective Date: 10-Jan-2003
• Refers: ASTM D4370-01 - Standard Test Methods for Acid and Base Milliequivalent Content of Electrocoat Bath
• Effective Date: 10-Jan-2001
• Refers: ASTM D4370-84(1994) - Standard Test Methods for Acid and Base Milliequivalent Content of Electrocoat Bath
• Effective Date: 10-Jan-2001
• Refers: ASTM D4584-86(1999) - Standard Test Method for Measuring Apparent pH of Electrocoat Baths
• Effective Date: 10-May-1999
• Refers: ASTM D4399-90(1999) - Standard Test Method for Measuring Electrical Conductivity of Electrocoat Baths
• Effective Date: 10-May-1999
• Refers: ASTM D5145-90(1997) - Standard Test Methods for Nonvolatile and Pigment Content of Electrocoat Baths
• Effective Date: 10-Jun-1997

Standards Content (Sample)

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: D1978 − 91 (Reapproved 2018)
Standard Guide for
Analysis of Electrocoat Bath Samples
This standard is issued under the fixed designation D1978; 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. Significance and Use
1.1 This guide covers the selection of test methods for 3.1 This guide indicates test procedures recommended for
determination of the important parameters that affect the the maintenance of acceptable performance of the paint in an
performance of electrocoating paints. electrocoating bath. Several critical parameters must be deter-
mined throughout the operation of the bath. These parameters
1.2 The test methods involved are D4370, D4399, D4584,
must be adjusted when deviations from the norm occur.
and D5145.
3.2 The test methods for electrocoat baths are unique, as the
1.3 This international standard was developed in accor-
aqueous samples have a nonvolatile content between 8 and
dance with internationally recognized principles on standard-
25 %. Constant agitation must be present when the samples are
ization established in the Decision on Principles for the
taken and during the measurement of some of the parameters.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Test Methods
Barriers to Trade (TBT) Committee.
4.1 Acid and Base Content—Test Methods D4370 covers
the determination of acid and base milliequivalent content of
2. Referenced Documents
electrocoat baths.
2.1 ASTM Standards:
4.2 Electrical Conductivity—Test Method D4399 describes
D4370 Test Methods for Acid and Base Milliequivalent
the determination of the electrical conductivity of electrocoat
Content of Electrocoat Bath
baths.
D4399 Test Method for Measuring Electrical Conductivity
of Electrocoat Baths
4.3 pH Determination—Test Method D4584 describes the
D4584 Test Method for Measuring Apparent pH of Electro- measurement of the apparent pH of paints and ultrafiltrates of
coat Baths electrocoat baths.
D5145 Test Methods for Nonvolatile and Pigment Content
4.4 Nonvolatile and Pigment Content—Test Method D5145
of Electrocoat Baths
covers the determi
...