ISO 21608:2012 PDF

Corrosion of metals and alloys — Test method for isothermal-exposure oxidation testing under high-temperature corrosion conditions for metallic materials

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Title (English):

ISO 21608:2012

Corrosion of metals and alloys — Test method for isothermal-exposure oxidation testing under high-temperature corrosion conditions for metallic materials

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 14
Publication date:: March 12, 2012
Edition:: ISO IS 21608 edition 1 version 1
ICS:: 77.060

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Description (English):

L'ISO 21608:2012 spécifie la méthode pour conduire les essais d'exposition de matériaux métalliques à des environnements gazeux corrosifs à haute température et en conditions isothermes continus (un seul mesurage de masse après exposition, sur chaque éprouvette d'une série d'éprouvettes sans refroidissement intermédiaire) et discontinus (série de mesurages de masse sur une seule éprouvette avec refroidissement intermédiaire à des instants prédéterminés pas nécessairement réguliers et relativement peu nombreux). Par contre, les essais cycliques d'oxydation thermique (série de mesurages de masse sur une seule éprouvette avec refroidissement régulier fréquent de manière à accélérer la corrosion à haute température) ne sont pas inclus dans l'ISO 21608:2012.

Technical details

Technical committee: ISO/TC 156 - Corrosion of metals and alloys
SKU: ISO 21608:2012

Abstract

Overview

ISO 21608:2012 specifies a laboratory test method for isothermal-exposure oxidation testing of metallic materials under high‑temperature corrosion conditions in gaseous environments. It defines how to run continuous or discontinuous isothermal exposures (single or repeated mass measurements) to determine oxidation kinetics, mass-change behaviour (gross and net), and phenomena such as scale formation and breakaway. Thermal‑cycling oxidation tests are explicitly excluded.

Key topics and technical requirements

Test types
- Continuous: single post‑exposure mass measurement for a series of specimens.
- Discontinuous: repeated mass measurements on a specimen with controlled intermediate cooling.
Specimens (test pieces)
- Typical shapes: rectangular plate, disc or cylinder; minimum thickness stated (1.5 mm) and surface finish using abrasives with mean particle diameter ≈15 µm.
- Final machining and cleaning (ultrasonic degreasing with iso‑propanol or ethanol) required; mass measured with high precision (repeat measurements within 0.05 mg).
Exposure scheduling
- Use several exposure times to define oxidation kinetics; duplicate specimens recommended and progressively increasing time intervals (example series shown in the standard).
Test atmosphere and gas supply
- Closed systems (preferred) with controlled gas flow, humidifying regulator and hygrometer; deionized water (

Related standards

Other ISO standards

Overview

Key topics and technical requirements

Test types
- Continuous: single post‑exposure mass measurement for a series of specimens.
- Discontinuous: repeated mass measurements on a specimen with controlled intermediate cooling.
Specimens (test pieces)
- Typical shapes: rectangular plate, disc or cylinder; minimum thickness stated (1.5 mm) and surface finish using abrasives with mean particle diameter ≈15 µm.
- Final machining and cleaning (ultrasonic degreasing with iso‑propanol or ethanol) required; mass measured with high precision (repeat measurements within 0.05 mg).
Exposure scheduling
- Use several exposure times to define oxidation kinetics; duplicate specimens recommended and progressively increasing time intervals (example series shown in the standard).
Test atmosphere and gas supply
- Closed systems (preferred) with controlled gas flow, humidifying regulator and hygrometer; deionized water (

ISO 21608:2012 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

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Abstract

Overview

Key topics and technical requirements

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