CORROSION PREVENTION AND CONTROL (CPC) - Continued
INTERGRANULAR: Metal deterioration caused by corrosion on the bonds between or across the grain
boundaries of the metal. The metal will appear to be peeling off in sheets, flaking, or being pushed apart by
layers. A particular type of intergranular corrosion is exfoliation.
PITTING: This can result from conditions similar to those for crevice corrosion. Pits can develop on various
materials due to their composition. Rifle boxes are big victims of pitting.
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 a 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, PQDR should be submitted to the address specified in DA PAM 750-8.
OZONE DEPLETING SUBSTANCES (ODS)
The use of Class 1 ODS for new acquisitions has been curtailed by Section 326 of the National Defense
Authorization Act of Fiscal Year 1993 (Public Law 102, 484) and related Army policy. Ozone depleting substances
are listed in Title VI of the Clean Air Act. For systems procured and fielded prior to the effectiveness of the above
law (June 1993) that use a Class 1 ODS, a listing of those substances required to operate and maintain the
system shall be included in the manual. This requirement applies to any system procured or fielded after
June 1993 that requires the use of a Class 1 ODS, where the use of the ODS has been properly documented and
waived. The procuring activity will provide a list of Class 1 ODS on request.
DESTRUCTION OF ARMY MATERIEL TO PREVENT ENEMY USE
The procedures for destruction of Army materiel to prevent enemy use are contained in Technical
Manual (TM) 750-244-6.
PREPARATION FOR STORAGE OR SHIPMENT
Refer to TM 55-1925-205-10, WP 0119 for storage or shipment information.
LIST OF ABBREVIATIONS/ACRONYMS
Army Oil Analysis Program
Basic Issue Item
Commercial and Government Entity Code