The Effect of Velocity on Sulfide-Induced Corrosion of Copper-Base Condenser Alloys in Aerated Seawater.
Abstract
The combined influence of low-level sulfide pollution in seawater and water velocity on several copper base condenser alloys was investigated. The alloys studied included 90-10 copper-nickel (C70600), 70-30 copper-nickel (C71500), IN838 (C72200), and aluminum-brass (C68700). Thin specimens of these alloys were exposed in a nonrecirculating test loop to aerated natural seawater containing additions of sodium sulfide. Sulfide concentrations were 0.0, 0.01, 0.05, and 0.10 milligram per liter and dissolved oxygen levels were nominally 80% of air-saturated values. The effect of change in flow velocity in the range of 0.5 to 4.0 meters per second on sulfide-induced accelerated corrosion was studied over test durations of 30-90 days. The amount of sulfide-induced corrosion on C70600 and C71500 was found to depend primarily on the interaction between sulfide concentration and velocity, with the effect of either variable being minimumwhen the other was low. The variation of sulfide induced corrosion of C72200 and C68700 with sulfide concentration and velocity was found to be much more complex, possibly due to the chromium, aluminum or zinc additions. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1980
- Accession Number
- ADA090035
Entities
People
- D. G. Tipton
- David W Taylor
- HP Hack
- T. S. Lee