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ASTM G3-14

ASTM G3-14

Standard Practice for Conventions Applicable to Electrochemical Measurements in Corrosion Testing

2019-06-10 /Historical
Superseeded by:
Significance and Use:

3.1 This practice provides guidance for reporting, displaying, and plotting electrochemical corrosion data and includes recommendations on signs and conventions. Use of this practice will result in the reporting of electrochemical corrosion data in a standard format, facilitating comparison between data developed at different laboratories or at different times. The recommendations outlined in this standard may be utilized when recording and reporting corrosion data obtained from electrochemical tests such as potentiostatic and potentiodynamic polarization, polarization resistance, electrochemical impedance and admittance measurements, galvanic corrosion, and open circuit potential measurements.


1.1 This practice covers conventions for reporting and displaying electrochemical corrosion data. Conventions for potential, current density, electrochemical impedance and admittance, as well as conventions for graphical presentation of such data are included.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. See also 7.4.

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.

ac impedance; Bode; convention; electrochemical impedance spectroscopy; electrochemical measurement; electrode potential; linear polarization; Nyquist; polarization resistance; potentiodynamic polarization; reference electrode;
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