A CASE HISTORY ON THE PHENOMENAL CORROSION OF MARINE PROPELLERS IN FISHING BOATS

Abstract

Although high tensile brassess of copper-zinc alloys (Manganese
bronze) find extensive use in all marine applications, under
aggressive sea-water, marine propellers cast out of such an alloy
frequently suffer heavy corrosion damages due to dezincification.
An interesting case history where a number of propellers have
undergone dezincification in the Cochin back-waters is narrated in
this paper.