Effect of mechanical cleaning on seawater corrosion of candidate OTEC heat exchanger materials. Part 1. Tests with M. A. N. brushes
Corrosion evaluations were conducted on 3003 Alclad, 5052 aluminum, C7 0600 copper-nickel, AL-6X stainless steel, and commercially-pure titanium in natural seawater under simulated OTEC heat exchanger conditions to investigate the erosion-corrosion effects of mechanical tube cleaning. Test conditions of M.A.N. brush cleaning and M.A.N. brush cleaning + chlorination were compared with no mechanical cleaning over a seven month period. M.A.N. brushing significantly accelerated corrosion of 5052 aluminum and C7 0600 copper-nickel. Chlorination significantly accelerated erosion-corrosion of 3003 Alclad and 5052 aluminium. Chlorination somewhat decreased erosion-corrosion of C7 0600 copper-nickel. There was no detectable effect of M.A.N. brushing or chlorination on AL-6X stainless steel or titanium, although AL-6X exhibited crevice corrosion at tubing connections. 3003 Alclad and 5052 aluminum exhibited piting corrosion in all 3 test environments.
- Research Organization:
- LaQue Center for Corrosion Technology, Inc., Wrightsville Beach, NC (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-31-109-ENG-38
- OSTI ID:
- 6728251
- Report Number(s):
- ANL/OTEC-BCM-013
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
CORROSION
SURFACE CLEANING
COPPER BASE ALLOYS
HEAT EXCHANGERS
MATERIALS TESTING
NICKEL ALLOYS
OCEAN THERMAL POWER PLANTS
SEAWATER
CORROSIVE EFFECTS
STAINLESS STEELS
TITANIUM
CHLORINATION
EROSION
EXPERIMENTAL DATA
MECHANICAL POLISHING
PITTING CORROSION
TABLES
TUBES
WEIGHT MEASUREMENT
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CLEANING
COPPER ALLOYS
CORROSION RESISTANT ALLOYS
DATA
ELEMENTS
HALOGENATION
HYDROGEN COMPOUNDS
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
METALS
NUMERICAL DATA
OXYGEN COMPOUNDS
POLISHING
POWER PLANTS
SOLAR POWER PLANTS
STEELS
SURFACE FINISHING
TESTING
THERMAL POWER PLANTS
TRANSITION ELEMENTS
WATER
140800* - Solar Energy- Ocean Energy Systems
360105 - Metals & Alloys- Corrosion & Erosion