Pitting Corrosion Test
Determines the resistance to pitting corrosion.
Overview
Localized corrosion resistance in aggressive media
Pitting and crevice corrosion tests conducted in accordance with ASTM G48 are essential for manufacturing industries as they assess a material’s resistance to localized corrosion in aggressive environments.
ISO/IEC 17025:2017 accredited practices and reporting.
Assessment
What these tests assess
Samples are exposed to a corrosive environment—often ferric chloride solutions—to identify susceptibility to pitting and crevice attack. Results are complemented by a standardized method for evaluating the degree of general corrosion with detailed guidelines for interpretation. Together, these tests help ensure components resist localized degradation effectively.
Methods
Six methods in ASTM G48
Crevice Corrosion Test
Assesses resistance by introducing a crevice to the sample.
Critical Pitting Temperature Test
Determines the critical temperature above which pitting initiates.
Critical Crevice Temperature Test
Determines the temperature for crevice corrosion initiation.
CPT Ranking Test
Establishes a ranking system for materials based on pitting resistance.
CCT Evaluation Test
Evaluates materials for critical crevice corrosion resistance in one test.
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Share alloy, form, and pass/fail criteria. We’ll confirm the appropriate G48 method and reporting plan.