TM 5-3805-296-23-1
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EROSION: Results when a moving fluid (liquid or gas) flows across a metal surface, particularly when solid
particles are present in the fluid. Corrosion actually occurs on the surface of the metal, but the moving fluid washes
away the corrosion and exposes a new metal surface, which also corrodes.
FRETTING: Occurs as result of small, repetitive movements (e.g., vibration) between two surfaces in contact with
each other. It's usually identified by a black powder corrosion product or pits on the surface.
GALVANIC: Occurs when two different types of metal come in contact with each other, like steel bolts on
aluminum, for example. This is a common problem on aircraft because of their mix of metals.
STRESS: Term used to describe corrosion cracking and corrosion fatigue. Where an item is not ready/available
due to one of these forms of corrosion, it shall be recorded as a corrosion failure in the inspection record and the
appropriate code (170) for corrosion shall be used when requesting/performing maintenance.
SF Form 368, Product Quality Deficiency Report should be submitted to the address specified in DA PAM
750-8, The Army Maintenance Management System (TAMMS) Users Manual.
DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE
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For destruction of Army materiel to prevent enemy use, refer to TM 750-244-3.
PREPARATION FOR STORAGE AND SHIPMENT
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Refer to Operator's Manual (TM 5-3805-296-10) for information on preparation for storage and shipment, and
preparation for transport.
WARRANTY INFORMATION
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The Military 621G Scraper is warranted for 12 months. The warranty starts on the date found in block 23 of DA
Form 2408-9, Equipment Control Record. Report all defects to your supervisor, who will take appropriate action.
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