The use of nickel alloys in marine applications has generally evolved from the need for greater resistance to turbulence and velocity effects in seawater than could be obtained in copper alloys. Examples of such applications are the use of nickel-copper alloy for the trim of bronze seawater valves and for impellers and wear rings in bronze seawater pumps. The resistance to erosion and impingement of nickel-base alloys has been associated with their ability to remain passive and inert at velocities with their ability to remain passive and inert at velocities that strip protective films from copper alloys.1,2  In more recent years, more extensive studies of corrosion-erosion behavior of wider varieties of alloys, including test in seawater at velocities exceeding 100 fps, have provided further evidence of the excellent erosion resistance of the noble or passive alloys which includes titanium alloys and stainless steels as well as other nickel alloys.

Subject
Corrosion resistant alloys, Nickel based alloys, Molybdenum alloys, Nickel chromium molybdenum alloys, Seawater, Crevices, Corrosion attacks, Corrosion behavior, Crevice corrosion, Copper nickel alloys, Pitting, Alloys, Types of corrosion
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1970
Association for Materials Protection and Performance (AMPP)
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