Corrosion

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Corrosion

Corrosion is an imminent danger for containments in which a corrosive medium is stored. Advanced corrosion leads to leakage and in its worst case even loss of integrity. Any such failure implies loss of asset and the risk of additional damage compensation costs. A leaking medium may pollute environment and be hazardous for people. Hence it is vital for an operator to know the condition of storage containments in order to schedule maintenance.

AE-testing is a method for screening active corrosion and active leakage in storage containments. The test method exploits acoustic emissions of corrosion process or leaking medium. It is a non-intrusive method without the need of opening and cleaning the storage containment prior to inspection. The result of an AE-test poses a recommendation for a maximum operation period until a subsequent inspection is necessary.

Corrosion of the flat bottom of above ground storage tanks have been screened with AE for many years now. By analyzing AE-data corrosion sources can be located and classified into classes of different severity. The operation period until next inspection is based on a corrosion source’s severity.

Typical System Configuration:

Chassis

MB19 in single chassis or multi chassis configuration

AE-signal processor board

ASIP-2/S and TR-2/512 (transient recorder memory modules

AE-sensors

VS30-SIC-46dB or AEP4H-ISTB with VS30-V

Analysis software

VisualAE, VTR

Location modules

Tank bottom location and 3D location for small diameter tanks

Additional modules

ECP to program own analysis routines or license routines of others
VisualClass for transient pattern recognition

 

Resources for more information

Technical details can be found in the AMSY-6 System Specification