Application and guidelines for use of cathodic protection in titanium-tubed condensers

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:405481

Peroni, B M ^[1]; Billemeyer, G W ^[2]; Mountford, Jr, J A ^[3]

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1. Florida Power & Light Co., Juno Beach, FL (United States)
2. Norton Corrosion Limited, Inc., Freehold, NJ (United States)
3. TIMET, Toronto, OH (United States)

The use of dissimilar metals in power plant condensers often dictates the need for cathodic protection (C.P.) of the more electrochemically active metal(s). Coatings are also used to control corrosion on some tube sheets and water boxes. In these cases, the intent of the C.P. is to protect the metal substrate at the coating voids or holidays. Proper design and application is necessary not only to mitigate corrosion of the active metals, but also to prevent to metals such as titanium and ferritic stainless steels. Improper application of cathodic protection potentials can lead to severe corrosion or unwanted hydrogen absorption by these materials. Proper design and control of C.P. systems implies a balance between obtaining a potential sufficient for corrosion protection while at the same time achieving minimal hydrogen production. This paper will update the history of cathodic protection used at a large utility, as well as present relevant and practical guidelines for trouble-free use of cathodic protection. In addition, the impact of new technology, such as tube sheet reference electrodes, will be addressed. The main focus will be on titanium tubing because of its ever-increasing, large scale use, and because the majority of condenser systems using titanium also require a cathodic protection system.

• OSTI ID: 405481
• Report Number(s): CONF-951208--
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
22 GENERAL STUDIES OF NUCLEAR REACTORS
42 ENGINEERING
CATHODIC PROTECTION
FOSSIL-FUEL POWER PLANTS
NUCLEAR POWER PLANTS
STEAM CONDENSERS
TITANIUM ALLOYS
TUBES