ASTM G102-89(2015)e1
Standard Practice for Calculation of Corrosion Rates and Related Information from Electrochemical Measurements

Standard No.

ASTM G102-89(2015)e1

Release Date

1989

Published By

American Society for Testing and Materials (ASTM)

Status

Be replaced

Replace By

ASTM G102-23

Latest

ASTM G102-23

Scope

3.1 Electrochemical corrosion rate measurements often provide results in terms of electrical current. Although the conversion of these current values into mass loss rates or penetration rates is based on Faraday's Law, the calculations can be complicated for alloys and metals with elements having multiple valence values. This practice is intended to provide guidance in calculating mass loss and penetration rates for such alloys. Some typical values of equivalent weights for a variety of metals and alloys are provided.

3.2 Electrochemical corrosion rate measurements may provide results in terms of electrical resistance. The conversion of these results to either mass loss or penetration rates requires additional electrochemical information. Some approaches for estimating this information are given.

3.3 Use of this practice will aid in producing more consistent corrosion rate data from electrochemical results. This will make results from different studies more comparable and minimize calculation errors that may occur in transforming electrochemical results to corrosion rate values.

1.1 This practice covers the providing of guidance in converting the results of electrochemical measurements to rates of uniform corrosion. Calculation methods for converting corrosion current density values to either mass loss rates or average penetration rates are given for most engineering alloys. In addition, some guidelines for converting polarization resistance values to corrosion rates are provided.

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

ASTM G102-89(2015)e1 Referenced Document

• ASTM D2776 Standard Test Methods for Corrosivity of Water in the Absence of Heat Transfer (Electrical Methods)
• ASTM G1 Standard Practice for Preparing, Cleaning, and Evaluating Corrosion Test Specimens*， 1999-01-01 Update
• ASTM G5 Standard Reference Test Method for Making Potentiostatic and Potentiodynamic Anodic Polarization Measurements*， 1994-04-20 Update
• ASTM G59 Standard Test Method for Conducting Potentiodynamic Polarization Resistance Measurements*， 1997-04-20 Update

ASTM G102-89(2015)e1 history

• 2023 ASTM G102-23 Standard Practice for Calculation of Corrosion Rates and Related Information from Electrochemical Measurements
• 1989 ASTM G102-89(2015)e1 Standard Practice for Calculation of Corrosion Rates and Related Information from Electrochemical Measurements
• 2010 ASTM G102-89(2010) Standard Practice for Calculation of Corrosion Rates and Related Information from Electrochemical Measurements
• 1989 ASTM G102-89(2004)e1 Standard Practice for Calculation of Corrosion Rates and Related Information from Electrochemical Measurements
• 1989 ASTM G102-89(1999) Standard Practice for Calculation of Corrosion Rates and Related Information from Electrochemical Measurements