Contact person
Peter Eriksson
Forskare
Contact PeterAccelerated Corrosion tests with corrosive gas
Corrosion tests with corrosive gases are used when the corrosive atmosphere not solely is constituted of moisture and salts but also inorganic aggressive gases. The ambient environment is usually not only constituted of inorganic gases but also moisture and salts. In these cases, RISE may use both corrosive gas and salt mist.
Purpose
Accelerated corrosion testing with aggressive inorganic gases are utilized to simulate in-use conditions. A good estimation regarding the lifetime of products and technical systems is gained if a strong acceleration of the in-use conditions is used and the correct degradation mechanisms are proven.
To secure that the proper simulation of in-use conditions is used in the corrosion test, a verification of the degradation accuracy must be conducted. RISE use comparators, in this case metal coupons, to decide on type of test and corrosive level of the corrosion test to satisfy the needs of our customers.
These tests may be used both for comparable test, i.e., developing a new surface coating as well as estimate the life-time of new products.
Method
The tests are performed in climatic chambers using well defined parameters such as; temperature (T) / Relative Humidity (RH) / gas concentrations etc. In order to secure the correctness of the levels of the present parameters all instruments are calibrated.
In our tests copper coupons are included to measure that the strength of the tests have been at the right level, i.e. corrosive gases, T and RH. Even for the corrosion standards copper coupons is the criterion for a well-performed test.
We perform chemical/physical analysis after the conclusion of the corrosion tests according to the customer’s needs. Surface analysis and thoroughly inspections of the tested objects are included in the commission established between the customer and RISE prior to start of the test. Test objects can also be biased with current or voltage during the test exposure, however, the effect of this bias should not affect testing conditions, i.e. affect temperature and relative humidity. This would mean that the standard in question is used incorrectly.
The following standard accredited test methods are used at our laboratory:
- ISO 21207
- IEC 60068-2-60, method 1-4
- IEC 60068-2-42, 43
- ISO 10062
In addition to common available tests on the market, other tests including the following corrosive gases could be performed at RISE, such as SO2, NO2, H2S, Cl2 and NH3.
Delivery
The results are delivered in a RISE report, eventually added data could be added according to the customer’s desire.
