ASTM D5145-09
(Test Method)Standard Test Methods for Nonvolatile and Pigment Content of Electrocoat Baths
Standard Test Methods for Nonvolatile and Pigment Content of Electrocoat Baths
SIGNIFICANCE AND USE
The nonvolatile content and pigment content are measures of total solids and inorganic pigment solids, respectively, in electrocoat paints. In addition to production quality control, these properties are important in maintaining electrocoat baths in the optimum range.
Other test methods for determining nonvolatile content of paint and paint related materials are described in Guide D 2832.
SCOPE
1.1 These test methods cover the characterization of electrocoat baths through the determination of nonvolatile content of inorganic pigment content.
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.
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Designation: D5145 − 09
StandardTest Methods for
1
Nonvolatile and Pigment Content of Electrocoat Baths
This standard is issued under the fixed designation D5145; 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* in electrocoat paints. In addition to production quality control,
these properties are important in maintaining electrocoat baths
1.1 These test methods cover the characterization of elec-
in the optimum range.
trocoat baths through the determination of nonvolatile content
of inorganic pigment content.
4.2 Other test methods for determining nonvolatile content
of paint and paint related materials are described in Guide
1.2 The values stated in SI units are to be regarded as
D2832.
standard. No other units of measurement are included in this
standard.
5. Apparatus
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5.1 Analytical Balance with a sensitivity of 0.1 mg.
responsibility of the user of this standard to establish appro-
5.2 Aluminum Weighing Dishes, 57 mm in diameter and 17
priate safety and health practices and determine the applica-
mm deep. These commercial dishes may contain a lubricant
bility of regulatory limitations prior to use.
used during their manufacture. This should be removed by
2. Referenced Documents
heating the aluminum dishes on a hot plate at 300°C until
2
vapors are no longer visible. Store the dishes in a desiccator
2.1 ASTM Standards:
until needed.
D1193 Specification for Reagent Water
D2832 GuideforDeterminingVolatileandNonvolatileCon-
5.3 Syringes, 5-mL, disposable variety.
tent of Paint and Related Coatings
E180 Practice for Determining the Precision of ASTM 5.4 Oven circulating, maintained at 110 6 2°C.
Methods for Analysis and Testing of Industrial and Spe-
5.5 Muffle Furnace, maintained at 500 6 15°C.
3
cialty Chemicals (Withdrawn 2009)
3. Summary of Test Method 6. Reagents
3.1 Two specimens are accurately weighed into aluminum
6.1 Purity of Water—References to water shall be under-
weighing dishes.The dishes are placed in an oven at 110°C for
stood to mean water conforming to Type II of Specification
1 h, reweighed to obtain the nonvolatile matter content and, if
D1193.
required, placed in a muffle furnace at 500°C for2hand
weighed a third time to obtain the inorganic pigment content.
7. Sampling and Sample Preparation
4. Significance and Use
7.1 Obtain the sample while the electrocoat bath is under
proper circulation so a uniform sample is obtained. In the case
4.1 The nonvolatile content and pigment content are mea-
of a ultrafiltrate sample, the material should be thoroughly
sures of total solids and inorganic pigment solids, respectively,
mixed or stirred prior to drawing the sample, thereby ensuring
1 uniformity.
These test methods are under the jurisdiction of ASTM Committee D01 on
Paint and Related Coatings, Materials, and Applications and are the direct
7.2 Aftersampling,priortoremovingthetestspecimen,itis
responsibility of Subcommittee D01.21 on Chemical Analysis of Paints and Paint
Materials. mandatory the sample be shaken or stirred until it is homoge-
Current edition approved Feb. 1, 2009. Published March 2009. Originally
neous and free of any settled material. This is particularly
approved in 1990. Last previous edition approved in 2003 as D5145 - 03. DOI:
important if there is a delay between sampling the bath and
10.1520/D5145-09.
2
performing this test procedure. The absence of settled material
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
should be ascertained visually or by inserting a spatula and
Standards volume information, refer to the standard’s Document Summary page on
scraping the bottom of the container. Continue to shake or stir
the ASTM website.
3 the sample until specimens are taken for measurement. This
The last approved version of this historical standard is referenced on
www.astm.org. Point is Very Important.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D5145 − 09
NONVOLATILE CONTENT 10.2 Bias cannot be determined because there are no ac-
cepted standards for nonvolatile content of electrocoat baths.
8. Procedure
INORGANIC PIGMENT CONTENT
8.1 Weigh two aluminum dishes separately, each to 0.1 mg
and record as W .
1
11. Procedure
8.2 Using a syringe, withdraw 1.0
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D5145–03 Designation:D5145–09
Standard Test Methods for
1
Nonvolatile and Pigment Content of Electrocoat Baths
This standard is issued under the fixed designation D 5145; 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*
1.1 These test methods cover the characterization of electrocoat baths through the determination of nonvolatile content of
inorganic pigment content.
1.2
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.
2. Referenced Documents
2
2.1 ASTM Standards:
D 1193 Specification for Reagent Water
D 2832 Guide for Determining Volatile and Nonvolatile Content of Paint and Related Coatings
E 180 Practice for Determining the Precision ofASTM Methods forAnalysis andTesting of Industrial Chemicals and Specialty
Chemicals
3. Summary of Test Method
3.1 Two specimens are accurately weighed into aluminum weighing dishes. The dishes are placed in an oven at 110°C for 1
h, reweighed to obtain the nonvolatile matter content and, if required, placed in a muffle furnace at 500°C for 2 h and weighed
a third time to obtain the inorganic pigment content.
4. Significance and Use
4.1 The nonvolatile content and pigment content are measures of total solids and inorganic pigment solids, respectively, in
electrocoat paints. In addition to production quality control, these properties are important in maintaining electrocoat baths in the
optimum range.
4.2 Other test methods for determining nonvolatile content of paint and paint related materials are described in Guide D 2832.
5. Apparatus
5.1 Analytical Balance with a sensitivity of 0.1 mg.
5.2 Aluminum Weighing Dishes, 57 mm in diameter and 17 mm deep. These commercial dishes may contain a lubricant used
during their manufacture. This should be removed by heating the aluminum dishes on a hot plate at 300°C until vapors are no
longer visible. Store the dishes in a desiccator until needed.
5.3 Syringes, 5-mL, disposable variety.
5.4 Oven circulating, maintained at 110 6 2°C.
5.5 Muffle Furnace, maintained at 500 6 15°C.
6. Reagents
6.1 Purity of Water—References to water shall be understood to mean water conforming to Type II of Specification D 1193.
1
These test methods are under the jurisdiction of ASTM Committee D01 on Paint and Related Coatings, Materials, and Applications and are the direct responsibility of
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials .
Current edition approved Jan. 10, 2003.Feb. 1, 2009. Published March 2003.2009. Originally approved in 1990. Last previous edition approved in 19972003 as
D5145-90(1997).D 5145 - 03.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
, Vol 11.01.volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D5145–09
7. Sampling and Sample Preparation
7.1 Obtain the sample while the electrocoat bath is under proper circulation so a uniform sample is obtained. In the case of a
ultrafiltrate sample, the material should be thoroughly mixed or stirred prior to drawing the sample, thereby ensuring uniformity.
7.2 After sampling, prior to removing the test specimen, it is mandatory the sample be shaken or stirred until it is homogeneous
and free of any settled material. This is particularly important if there is a delay between sampling the bath and performing this
test procedure. The absence of settled material should be ascertained visually or by inserting a spatula and scraping the bottom of
the container. Continue to shake or stir the sample until specimens are taken for measurement. This Point is Very Important.
NONVOLATILE CONTENT
8. Procedure
8.1 Weigh two aluminum dishes separa
...
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