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51313-02801-Innovative Approach for Predicting Galvanic Corrosion Effects on Airframe Systems

Product Number: 51313-02801-SG
ISBN: 02801 2013 CP
Author: Alan Rose
Publication Date: 2013
$0.00
$20.00
$20.00

Alan Rose
Corrdesa LLC
176 Millard Farmer Industrial Boulevard
Newnan Georgia 30263
arose@corrdesa.com

Christophe Baeté
Elsyca nv
Vaartdijk 3/603
3018 Wijgmaal (Leuven)
Belgium
christophe.baete@elsyca.com

Keith O. Legg
Corrdesa LLC
1590 S. Milwaukee Ave Suite 205
Libertyville IL 60048
klegg@corrdesa.com

ABSTRACT
Naval aircraft typically comprise multiple materials each exhibiting unique electrochemical properties. When exposed to harsh marine environments the difference in material properties can lead to severe galvanic corrosion resulting in safety risks costly repair and reduced readiness.
Current design tools do not have the capabilities to account for this corrosion degradation. The accepted approach is to minimize galvanic corrosion by introducing sealants coatings and other barrier materials but these technical solutions degrade over time and eventually corrosion attack is inevitable.
In this paper a new physics-based corrosion prediction software tool is shown to assess and mitigate potential uniform and galvanic corrosion problems in the design phase. The electrochemical properties of the materials are derived from laboratory testing and are directly used as input in a 3-D computational CAD model of any complex airframe structure. The corrosion prediction software tool is very comprehensive and is usable by designers with restricted knowledge of corrosion and finite element analysis
An SBIR project funded by the Office of Naval Research (ONR) demonstrated that this new modeling approach could identify and quantify the severity of several corrosion issues already observed in some aircraft systems. This can be avoided up-front by assessing the applicability of new material combinations and surface finishes. In this way downtime and maintenance cost of the naval air fleet can be significantly reduced.
Keywords: galvanic corrosion naval aircraft structures simulation software

Alan Rose
Corrdesa LLC
176 Millard Farmer Industrial Boulevard
Newnan Georgia 30263
arose@corrdesa.com

Christophe Baeté
Elsyca nv
Vaartdijk 3/603
3018 Wijgmaal (Leuven)
Belgium
christophe.baete@elsyca.com

Keith O. Legg
Corrdesa LLC
1590 S. Milwaukee Ave Suite 205
Libertyville IL 60048
klegg@corrdesa.com

ABSTRACT
Naval aircraft typically comprise multiple materials each exhibiting unique electrochemical properties. When exposed to harsh marine environments the difference in material properties can lead to severe galvanic corrosion resulting in safety risks costly repair and reduced readiness.
Current design tools do not have the capabilities to account for this corrosion degradation. The accepted approach is to minimize galvanic corrosion by introducing sealants coatings and other barrier materials but these technical solutions degrade over time and eventually corrosion attack is inevitable.
In this paper a new physics-based corrosion prediction software tool is shown to assess and mitigate potential uniform and galvanic corrosion problems in the design phase. The electrochemical properties of the materials are derived from laboratory testing and are directly used as input in a 3-D computational CAD model of any complex airframe structure. The corrosion prediction software tool is very comprehensive and is usable by designers with restricted knowledge of corrosion and finite element analysis
An SBIR project funded by the Office of Naval Research (ONR) demonstrated that this new modeling approach could identify and quantify the severity of several corrosion issues already observed in some aircraft systems. This can be avoided up-front by assessing the applicability of new material combinations and surface finishes. In this way downtime and maintenance cost of the naval air fleet can be significantly reduced.
Keywords: galvanic corrosion naval aircraft structures simulation software

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