Naval electrochemical corrosion reducer

Patent · Tue Oct 01 00:00:00 EDT 1991

OSTI ID:868003

Clark, Howard L ^[1]

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1. Ballston Lake, NY

A corrosion reducer for use with ships having a hull, a propeller mounted a propeller shaft and extending through the hull, bearings supporting the shaft, at least one thrust bearing and one seal. The improvement includes a current collector and a current reduction assembly for reducing the voltage between the hull and shaft in order to reduce corrosion due to electrolytic action. The current reduction assembly includes an electrical contact, the current collector, and the hull. The current reduction assembly further includes a device for sensing and measuring the voltage between the hull and the shaft and a device for applying a reverse voltage between the hull and the shaft so that the resulting voltage differential is from 0 to 0.05 volts. The current reduction assembly further includes a differential amplifier having a voltage differential between the hull and the shaft. The current reduction assembly further includes an amplifier and a power output circuit receiving signals from the differential amplifier and being supplied by at least one current supply. The current selector includes a brush assembly in contact with a slip ring over the shaft so that its potential may be applied to the differential amplifier.

• Assignee: United States of America as represented by Secretary of Navy (Washington, DC)
• Patent Number(s): US 5052962
• Application Number: 07/527,965
• OSTI ID: 868003
• Country of Publication: United States
• Language: English

Related Subjects

naval
electrochemical
corrosion
reducer
ships
hull
propeller
mounted
shaft
extending
bearings
supporting
thrust
bearing
seal
improvement
current
collector
reduction
assembly
reducing
voltage
reduce
due
electrolytic
action
electrical
contact
device
sensing
measuring
applying
reverse
resulting
differential
05
volts
amplifier
power
output
circuit
receiving
signals
supplied
supply
selector
brush
slip
potential
applied
differential amplifier
power output
current collector
electrical contact
thrust bearing
receiving signals
output circuit
chemical corrosion
electrochemical corrosion
corrosion reducer
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