Standard Test Method for Measuring Apparent pH of Electrocoat Baths

Importancia y uso:

4.1 The pH is the measure of the free hydrogen ion concentration of a sample, and it indicates whether an electrocoat bath is acidic, neutral, or basic. Since pH measurements of good precision are made in aqueous solutions, it is suggested that the pH measurements of electrocoat baths are only semi-quantitative, and therefore such measurements should be referred to as apparent pH measurements.

4.2 The pH of electrocoat paints is used for research, production, and quality control or electrocoat bath process control.

4.3 Other related methods for determining the pH of water or aqueous systems are described in Test Methods D1293 and E70.

Subcomité:

D01.21

Referida por:

D1978-91R24

Volúmen:

06.01

Número ICS:

25.220.40 (Metallic coatings)

Palabras clave:

electrocoat baths; pH; pH measurement; ultrafiltrates;