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Effects of Wash-Rinse Intervals On Corrosion; Early Results Of A Ground Based Study

Introduction. Why Do We Presently Wash Aircraft ?Corrosion Control ?Cosmetics ?Present Policy Is To Wash At Specified Intervals Based On Environmental Severity (ESI)Recent But Cursory Studies Suggest That This Policy Should Be Examined Further. Study Objectives. Develop Quantitative Data On Effe

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Effects of Wash-Rinse Intervals On Corrosion; Early Results Of A Ground Based Study

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    1. Effects of Wash-Rinse Intervals On Corrosion; Early Results Of A Ground Based Study W.H. Abbott; Battelle-Columbus Richard Kinzie; AFCPO; Warner Robins

    2. Introduction Why Do We Presently Wash Aircraft ? Corrosion Control ? Cosmetics ? Present Policy Is To Wash At Specified Intervals Based On Environmental Severity (ESI) Recent But Cursory Studies Suggest That This Policy Should Be Examined Further

    3. Study Objectives Develop Quantitative Data On Effects Of Wash-Rinse Intervals On Corrosion Rates Study In Real Environments Study At Different Severity/ESI Levels Use Realistic Wash and Rinse Procedures Obtain Real-Time Corrosion Rate Data Using Corrosion Sensor technology

    4. Experimental Approach Utilize Metallic Corrosion Sensors As Test Vehicle Same Sensors As Being Flight Tested Mounted Vertically In Multiple, Outdoor Environments Differing Widely In Severity Wash And Rinse Independent Sensors At Fixed Intervals Wash With 5% B&B Regel In Local Tap Water Rinse By Spray With Local Tap Water Air Dry Naturally Measure Monthly As Electrical Output=Cumulative Corrosion

    5. Experimental (Contd) Exposure Locations ESI (percentile) Daytona Beach (75 meters) 95(very severe) Daytona Beach (1/4 mile inland) 75 (severe) Central Ohio (WPAFB ESI) 50 (moderate) Warner Robins 30 (mild) Wash Intervals Studied = No Wash, 1,2,4,7,14,28 days Photo= Typical Samples On Fence 3 sets Duplicate Samples (0,1,2 days) ESI Test Rack (not washed)

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