Corrosion tests
CETIM-CERMAT is able to respond to your questions relating to corrosion tests, whether in terms of a standardised service provision, in terms of choice of material(s) or coating(s), or in terms of technical support to define and implement specific tests.
Standardised corrosion tests:
These tests are perfectly defined through standards (ISO, AFNOR, ASTM and NACE) or specifications. The following can be mentioned:
Atmospheric corrosion tests:
- Salt spray, Cass test,
- Kesternich test (SO2 atmosphere),
-- Cyclical test (BS – T° - %HR): 3C, ECC1, etc.
- Immersion tests with measurement of weight losses, etc.
Salt spray test
Tests of resistance to a given form of corrosion:
- Corrosion under stress (MgCl2, NaCl, etc.)
- Intergranular corrosion (Huey, Monypenny Strauss, etc.)
- Corrosion by pitting,
- Selective corrosion (dezincification, etc.)
- Exfoliation corrosion, etc.
Dezincification test
Electrochemical tests performed in a given environment:
These tests allow access to certain parameters characteristic of the various forms of corrosion :
- Polarisation curves and plot of TAFEL straight lines (generalised corrosion),
- Polarisation resistance measurements (corrosion speed),
- Corrosion potential,
- Pitting and repassivation potential (corrosion by pitting),
- Galvanic coupling,
Electrochemical impedance meter allowing coating behaviour to be qualified (passivation layer, varnish, paint, metallic coating, etc.) especially by determination of charge coupled resistance.
Special, tailor-made tests:
These tests are defined after having studied the risks of corrosion (what form(s) of corrosion and what zone(s) in relation to conditions for use.
In this case, anything can be considered, whether in terms of duration or set-up.
CETIM-CERMAT / 21, rue de Chemnitz BP 2278 - 68068 Mulhouse Cedex
Tél : 03 89 32 72 20 / Fax : 03 89 59 97 87