Accession Number:

ADA331066

Title:

Studies on Corrosion of Aluminum Alloys by JP-1O Fuel Using Electrochemical Impedance Spectroscopy.

Descriptive Note:

Conference proceedings,

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION LAS CRUCES NM WHITE SANDS TESTFACILITY

Personal Author(s):

• Bhardwaj, Ramesh
• Gunaji, Mohan
• Beeson, Harold D.

Report Date:

1994-06-23

Pagination or Media Count:

14.0

Abstract:

A Government Industry Data Exchange Program alert has been issued that states that the fuel system icing inhibitor FSII in JP-10 fuel is corroding aluminum components in missile fuel systems during long-term storage under an anhydrous nitrogen atmosphere. Previous investigations into fuel-system corrosion have used extreme conditions such as high FSII concentration or temperature to accelerate corrosion. To better understand the effects of fuel additives on corrosion of aluminum alloy components, electrochemical impedance spectroscopy EIS was used to determine the corrosion rate as a function of additive type and concentration under conditions similar to those found in actual use. This paper presents the EIS results of corrosion studies conducted on Al 2024, Al 6061, Al A357, and Al 7075. The effects of concentration of the FSII, presence and absence of butylated hydroxytoluene, effect of water concentration, effect of temperature, and effects of coating on corrosion rates of these alloys will be presented and discussed in detail.

Descriptors:

• *FUEL SYSTEMS
• *SYMPOSIA
• *ALUMINUM ALLOYS
• *CORROSION RESISTANCE
• GUIDED MISSILES
• TEMPERATURE
• ELECTROCHEMISTRY
• PROTECTIVE COATINGS
• ACCELERATED TESTING
• FUEL ADDITIVES
• ICE PREVENTION

Subject Categories:

• Properties of Metals and Alloys
• Fuels
• Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE