Internal cathodic protection of seawater piping system by the use of the RCP method
Conference
·
OSTI ID:379705
- CorrOcean as, Trondheim (Norway)
- SINTEF Corrosion Centre, Trondheim (Norway)
Since the early eighties high alloyed stainless steels like austenitic steels with about 6% molybdenum (called 6Mo-steel) and duplex stainless steels with 25% Cr (called super duplex) have been widely used in seawater systems in connection with oil- and gas production. During the last ten years high alloyed stainless steels with 6% molybdenum (6Mo) or 25%Cr (super duplex) have been the most popular materials for seawater systems on offshore installations in the North Sea. The basis for this material selection was to obtain maintenance free systems with long lifetime. However, practical experience has shown that corrosion failures can occur. This paper presents a simple and economical method to avoid corrosion problems internally in piping systems transporting chlorinated seawater. The method is called RCP--Resistor controlled Cathodic Protection. Principles of the method including protection potential, current density requirements and anode design in addition to different practical applications are described.
- OSTI ID:
- 379705
- Report Number(s):
- CONF-960389--
- Country of Publication:
- United States
- Language:
- English
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