Naval electrochemical corrosion reducer

Patent · 01 October 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

/440/204/
05
action
amplifier
applied
applying
assembly
bearing
bearings
brush
chemical corrosion
circuit
collector
contact
corrosion
corrosion reducer
current
current collector
device
differential
differential amplifier
due
electrical
electrical contact
electrochemical
electrochemical corrosion
electrolytic
extending
hull
improvement
measuring
mounted
naval
output
output circuit
potential
power
power output
propeller
receiving
receiving signals
reduce
reducer
reducing
reduction
resulting
reverse
seal
selector
sensing
shaft
ships
signals
slip
supplied
supply
supporting
thrust
thrust bearing
voltage
volts