ASTM G148 is the ASTM standard titled Standard Practice for Evaluation of Hydrogen Uptake, Permeation, and Transport in Metals by an Electrochemical Technique. It provides a practical framework for assessing how hydrogen moves into and through metals, which matters because hydrogen behavior can influence material performance and reliability. By using an electrochemical approach, the standard helps support more consistent evaluation of metallic materials in testing, engineering, and quality control applications.

What is ASTM G148?

This standard practice describes an electrochemical technique for evaluating hydrogen uptake, permeation, and transport in metals. ASTM G148 is intended to help users measure and compare hydrogen-related behavior in a controlled way, which can be important when assessing how a metal may respond in service or during processing. As a practice, it supports repeatable testing and more consistent interpretation of results for engineering and materials evaluation.

Where is ASTM G148 used?

ASTM G148 is commonly used in laboratories and technical environments that evaluate metallic materials for hydrogen-related performance. It is relevant where electrochemical testing is used to study hydrogen entry and movement through metals, such as in materials development, failure analysis, and product qualification workflows. The standard is a useful reference for teams that need a structured method for comparing test results across different metals, surface conditions, or exposure scenarios.

Why is ASTM G148 important?

This standard helps improve consistency in hydrogen testing and supports better decision-making during material selection and evaluation. ASTM G148 is valuable because hydrogen uptake and permeation can affect performance in ways that are difficult to assess without a defined method. Using a recognized ASTM practice can support compliance efforts, quality control, and procurement review while reducing uncertainty in technical comparisons and product qualification.

• Electrochemical evaluation of hydrogen behavior
• Assessment of uptake, permeation, and transport
• Metal testing for engineering and quality control
• Consistent results for comparative material review
• Useful support for qualification and compliance workflows