TY - GEN
T1 - Cathodic protection tests for the galvanic corrosion of airframe grade CFRP/Al systems
AU - Morimoto, Tetsuya
AU - Koyanagi, Jun
N1 - Publisher Copyright:
© 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2016
Y1 - 2016
N2 - This paper reports on cathodic protection tests for airframe Alclad grade pure aluminum under galvanic corrosion risk by nobler carbon fiber reinforced plastics (CFRPs). Ti-bolt fastened aluminum Al-1050 and CFRP T800S/3900-2B (TORAY) has been subjected to salt water splay test to show that the sacrificial grids of AZ-31 and AZX-612 protect the Al passivation layer, even though the difference in potential of anodic Al-1050 and T800S/300-2B CFRPs, which contains cathodic graphite fibers, was found sufficient to trigger the galvanic corrosion. Even though electrical insulators, such as glass fiber reinforced plastics (GFRPs) and caulking resin layers, have been applied for the protection of galvanic corrosion, the impacts of both the airframe weight and the maintenance cost have been detrimental to the lightweight CFRPs; in addition, there is a need of conductive jumper design for the lightning arc prevention around propulsion systems, fuel systems and electricity systems. Therefore, the sacrificial grid for cathodic protection, which can attain both corrosion prevention and a reasonable conductivity, is an effective option for CFRP/Al airframe protection from galvanic corrosion.
AB - This paper reports on cathodic protection tests for airframe Alclad grade pure aluminum under galvanic corrosion risk by nobler carbon fiber reinforced plastics (CFRPs). Ti-bolt fastened aluminum Al-1050 and CFRP T800S/3900-2B (TORAY) has been subjected to salt water splay test to show that the sacrificial grids of AZ-31 and AZX-612 protect the Al passivation layer, even though the difference in potential of anodic Al-1050 and T800S/300-2B CFRPs, which contains cathodic graphite fibers, was found sufficient to trigger the galvanic corrosion. Even though electrical insulators, such as glass fiber reinforced plastics (GFRPs) and caulking resin layers, have been applied for the protection of galvanic corrosion, the impacts of both the airframe weight and the maintenance cost have been detrimental to the lightweight CFRPs; in addition, there is a need of conductive jumper design for the lightning arc prevention around propulsion systems, fuel systems and electricity systems. Therefore, the sacrificial grid for cathodic protection, which can attain both corrosion prevention and a reasonable conductivity, is an effective option for CFRP/Al airframe protection from galvanic corrosion.
UR - http://www.scopus.com/inward/record.url?scp=85088356405&partnerID=8YFLogxK
U2 - 10.2514/6.2016-1654
DO - 10.2514/6.2016-1654
M3 - Conference contribution
AN - SCOPUS:85088356405
SN - 9781624103926
T3 - 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
BT - 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, 2016
Y2 - 4 January 2016 through 8 January 2016
ER -