ASTM D5145-09 (2021) Standard Test Method for Nonvolatile and Pigment Content in Electrophoresis Tanks specifies an experimental method for determining the content of nonvolatile substances and pigments in electro-coating tanks. The electro-coating process is widely used in automotive and Miscellaneous metal surface coatings, and this standard provides a quantitative analysis method for key components in Electrophoresis bath fluids. By measuring the content of non-volatile matter and pigment, it is possible to effectively evaluate the use of Electrophoresis tanks and ensure the Stability and coating mass of Coating formulations.