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Corrosion Suppression Technologies and Techniques Print E-mail
Dec 01 2006
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Since Operation DESERT SHIELD in 1990, the AF has continued to operate extensively in a desert environment. These extended desert operations have resulted in the substantial intrusion of very fine sand and dust into aircraft, weapons systems, support equipment, and communications/ electronic equipment. The degree of this environmentally inflicted intrusion extends beyond what modern AF systems and equipment have previously experienced. Basically, the abrasive properties of the sand and dust are causing premature parts replacement due to wear. In fact, random sampling of contaminated equipment reveals high levels of corrosive anions, which accelerate the rate of corrosion in a wide variety of materials.

In response, the AFCPCO team is performing in-depth analysis in the areas of corrosion, erosion, and dust intrusion; corrosion prevention and control policies; the use of corrosion prevention compounds (CPC); the effectiveness and frequency of wash cycles; and cleaning methods. During its research, the team observed that soft-film CPCs allowed contaminants to adhere to surfaces, a condition that could impair the CPC’s effectiveness. Consequently, the researchers determined that hard-film coatings may be more effective as temporary coating replacements for nonmoving parts. The team subsequently provided recommendations involving cleaning equipment and the reapplication of CPCs in a sheltered environment instead of an open area. The researchers also offered advice regarding more frequent cleaning cycles, including both the removal and reapplication of coatings and the removal of excess coatings.

The team’s assessment also indicated an initial lack of aircraft exterior washing and clear-water rinse cycles in specific SWA forward areas. Additionally, the team noticed that technicians were generally not cleaning an aircraft’s interior surfaces until the asset returned to its home station. Despite poor water quality, a lack of adequate wash facilities and equipment, and an increased operational tempo, the proper removal of dust and grit contamination is nonetheless imperative to preventing corrosion, insulation erosion, air filter clogging, electrical switch and circuit breaker binding, and a variety of other adverse effects.



 

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