Effect of mechanical cleaning on seawater corrosion of candidate OTEC heat exchanger materials. Part 2. Tests with Amertap sponge rubber balls

Technical Report · Mon Jun 01 04:00:00 EDT 1981

OSTI ID:6172629

Tipton, D G

Corrosion evaluations were conducted on 3003 Alclad, C70600 copper-nickel, and commercially-pure titanium in natural seawater under simulated OTEC heat exchanger conditions to investigate the erosion-corrosion effects of mechanical tube cleaning under aggressive over-cleaning conditions. Test conditions for 3003 Alclad included Amertap soft sponge ball cleaning with and without chlorination. Amertap abrasive sponge ball cleaning with and without chlorination, and no mechanical cleaning as a control. C70600 was exposed to Amertap soft sponge ball cleaning with and without chlorination and with no mechanical cleaning as a control. Titanium was cleaned by abrasive Amertap sponge balls with and without chlorination and compared to no mechanical cleaning as a control. Test exposures of 8, 16, 30, 60, 90 and 180 days were made. The sequence of Amertap sponge ball cleaning utilized in the present tests significantly accelerated corrosion of 3003 Alclad. Chlorination brought about a further acceleration of erosion-corrosion of Alclad. Amertap soft sponge ball cleaning of C70600 caused significant acceleration of corrosion under these over-cleaning conditions. Chlorination somewhat decreased erosion corrosion of C70600. Titanium showed no substantial effect of Amertap abrasive sponge ball cleaning on corrosion, although measurable weight losses were incurred. Chlorination had no measurable effect on erosion-corrosion of titanium.

• Research Organization: Argonne National Lab., IL (USA)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 6172629
• Report Number(s): ANL/OTEC-BCM-018; ON: DE81029953
• Country of Publication: United States
• Language: English

Related Subjects

14 SOLAR ENERGY
140800* -- Solar Energy-- Ocean Energy Systems
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL REACTIONS
CHLORINATION
CLEANING
COPPER ALLOYS
CORROSION
CORROSIVE EFFECTS
ELEMENTS
EROSION
HALOGENATION
HEAT EXCHANGERS
HYDROGEN COMPOUNDS
MANGANESE ADDITIONS
MANGANESE ALLOYS
MATERIALS TESTING
METALS
NICKEL ALLOYS
OXYGEN COMPOUNDS
SEAWATER
TESTING
TITANIUM
TRANSITION ELEMENTS
WATER
ZINC ADDITIONS
ZINC ALLOYS