Solution: Exposure testing
Solution: Exposure testing
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Exposure testing
About Exposure Testing
Exposure and corrosion testing are commonly performed in the context of material selection for metals and alloys, quality control (e.g. Streicher or Huey tests), and product classification (e.g. ADR/CLP regulations).
In addition, corrosion testing and analysis are carried out when there is uncertainty regarding the corrosion risk of a specific material–environment combination, following an initial assessment based on literature data and expert knowledge.
Parameters in Exposure Testing
In a corrosion test or exposure test, coupons (test panels) of the material to be investigated (metal, plastic, coating) are exposed either to process conditions or to standardized conditions. The exposure period typically varies from several weeks to several months. Depending on the objective, the actual conditions are approximated as closely as possible, worst case conditions are imposed, or the materials are exposed to standardized conditions to qualify their use for a specific application.
Some of the parameters that need to be considered in exposure testing are:
- Material (surface condition, presence of a weld, …)
- Medium
- Phase (liquid, interface, gas)
- Aeration
- Temperature / pressure
- Agitation (movement, flow)
Wide range of testing possibilities and standards
We have a well-equipped laboratory in which, in addition to the classical exposure tests, simulations and pilot-scale tests are also developed and carried out specifically tailored to the customer. Below is a selection of exposure tests and corresponding standards that can be performed in the laboratory. This list is not exhaustive.
Examples of tests and relevant standards
- Exposure tests to determine degradation phenomena and (local) rate of attack in liquid phase / interface / gas phase – ASTM G1, ASTM G31
- Pitting corrosion tests – ASTM G48-A, ASTM G48-E
- Crevice corrosion tests – ASTM G78, ASTM G48-B
- Stress corrosion tests (including ‘drop evaporation test (DET)’)
- Galvanic (contact) corrosion tests
- HPHT corrosion test (autoclave corrosion test)
- Atmospheric corrosion tests (using salt spray tests, cyclic corrosion tests, condensation chambers, climate chambers) – ISO 9227, ASTM B117, Kesternich test, …
- Tests for evaluating corrosion under insulation (CUI) – ASTM G189, ASTM C795, ASTM C1617
- Tests according to ADR legislation (CLP guidelines, section 37.4.3)
- Quality tests such as Huey, Streicher and Strauss tests – ASTM A262, ASTM G28, ISO 3651
- Tests for evaluating corrosion inhibitors
- Cyclic polarization tests and electrochemical impedance spectroscopy (EIS)
Did not find what you are looking for?
If the test or standard you need is not listed here, please feel free to contact us. We are happy to look at your specific situation and assess which possibilities we can offer.
From Testing to Actionable Insights
Exposure testing provides valuable insights into:
- Corrosion mechanisms
- Material performance
- Expected service life
- Operational risks
TÜV AUSTRIA Belgium supports not only the execution of tests but also the interpretation of results and the formulation of practical recommendations for material selection, design, and maintenance strategies.
Contact
Would you like to define a tailored exposure testing program or receive expert advice? Contact us to discuss your requirements.
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