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Corrosion Monitoring
Every system which involves the exposure to corrosive environments should have an organized program of corrosion monitoring. Techniques which can be utilized in corrosion monitoring vary greatly depending on the nature of the system and the need for reliability. They are usually aimed at monitoring changes in the severity of service environment, determining the nature of corrosion (i.e. uniform or localized corrosion), or establishing a trend of corrosion rate for use in service life prediction. These techniques can include the following:
- Exposure and examination of corrosion coupons.
- Corrosion Problems using electrical resistance or linear polarization methods (or other more sophisticated electrochemical techniques).
- Ultrasonic Testing (UT) of materials thickness or crack growth by SCC.
- Hydrogen Probes (in hydrogen sulfide or other hydrogenating environments).
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