Electrical isolation method improves cathodic protection

Journal Article · Fri Aug 01 00:00:00 EDT 1997 · Materials Performance

OSTI ID:566685

Tachick, H N ^[1]

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1. Dairyland Electrical Industries, Stoughton, WI (United States)

Cathodically protected structures often require seemingly incompatible requirements. Ideally, a cathodically protected system should be isolated; yet if the system contains electrical equipment, it must also be grounded. Isolation and grounding are conflicting demands inherent in any system that contains electrical equipment and uses cathodic protection (CP) to mitigate corrosion. Cathodic protection of many structures can be greatly simplified by the proper use of direct current (DC) isolating/alternate current (AC) coupling devices. An example is DC isolation of cathodically protected structures from electrical grounding systems while retaining AC continuity with those systems as required by electrical codes.

• OSTI ID: 566685
• Journal Information: Materials Performance, Vol. 36, Issue 8; Other Information: PBD: Aug 1997
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
03 NATURAL GAS
02 PETROLEUM
PIPELINES
STEELS
CATHODIC PROTECTION
ELECTRIC GROUNDS
PUMPS
GAS COMPRESSORS
NATURAL GAS
PETROLEUM
TRANSPORT
SAFETY STANDARDS
METERS
VALVES