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96632 IN-SITU CORROSIVITY MONITORING OF MILITARY HARDWARE ENVIRONMENTS

Picture for 96632 IN-SITU CORROSIVITY MONITORING OF MILITARY
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Product Number: 51300-96632-SG
ISBN: 96632 1996 CP
Author: Vinod S. Agarwala
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A method to monitor corrosive conditions (environments) for military equipment was developed. The concept is based on the electrochemical principles of galvanic corrosion. It consisted of a novel thin film device (interdigitized bimetallic strips on a kapton polymer ) which was galvanically coupled or short circuited through a zero resistance ammeter (ZRA) and interfaced to a custom design data acquisition system called Corrosion Monitoring System (CMS). The sensor’s unique design allowed the use of any metal as the active element or anode to form the galvanic couple, which enhanced sensor’s versatility and usefulness in almost any application. In most applications Cd- Au sensor was used. For in-situ corrosivity monitoring sensors were installed in the interior of the aircraft, hidden structures, avionics bays, and embedded under coatings and sealants. The test sites included: military bases, aircraft carrier flight decks, marine atmosphere and operational aircraft and weapons storage areas. The results show a significant correlation between the output of the sensors and the corrosive conditions present, and may become a basis for condition based maintenance of military hardware in the future. Keywords: thin-film sensors, environmental corrosivity, electrochemical, galvanic couples, corrosion currents, aircraft preservation, corrosion monitoring system (CMS), military bases, aircraft carrier.
A method to monitor corrosive conditions (environments) for military equipment was developed. The concept is based on the electrochemical principles of galvanic corrosion. It consisted of a novel thin film device (interdigitized bimetallic strips on a kapton polymer ) which was galvanically coupled or short circuited through a zero resistance ammeter (ZRA) and interfaced to a custom design data acquisition system called Corrosion Monitoring System (CMS). The sensor’s unique design allowed the use of any metal as the active element or anode to form the galvanic couple, which enhanced sensor’s versatility and usefulness in almost any application. In most applications Cd- Au sensor was used. For in-situ corrosivity monitoring sensors were installed in the interior of the aircraft, hidden structures, avionics bays, and embedded under coatings and sealants. The test sites included: military bases, aircraft carrier flight decks, marine atmosphere and operational aircraft and weapons storage areas. The results show a significant correlation between the output of the sensors and the corrosive conditions present, and may become a basis for condition based maintenance of military hardware in the future. Keywords: thin-film sensors, environmental corrosivity, electrochemical, galvanic couples, corrosion currents, aircraft preservation, corrosion monitoring system (CMS), military bases, aircraft carrier.
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