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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.
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 , , , and .
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D4370 Test Methods for Acid and Base Milliequivalent Content of Electrocoat Bath
D4399 Test Method for Measuring Electrical Conductivity of Electrocoat Baths
D4584 Test Method for Measuring Apparent pH of Electrocoat Baths
D5145 Test Methods for Nonvolatile and Pigment Content of Electrocoat Baths
ICS Number Code 25.220.20 (Surface treatment)
ASTM D1978-91(2014), Standard Guide for Analysis of Electrocoat Bath Samples, ASTM International, West Conshohocken, PA, 2014, www.astm.orgBack to Top