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TO 1-1-700 - Robins Air Force Base

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<strong>TO</strong> 1-1-<strong>700</strong><br />

CHAPTER 7<br />

PREVENTATIVE MAINTENANCE AND REFINISHING ON<br />

STRUCTURAL COMPONENTS<br />

7.1 PURPOSE.<br />

This technical manual is intended for use by depot and field<br />

level maintenance personnel in the requirement and determination<br />

of the quality and acceptability of work performed for<br />

cleaning, corrosion prevention and control, and repair of<br />

Ground Communication, Electronics, and Meteorological<br />

Equipment (C-E-M) and its protective shelters, vans, and<br />

radomes.<br />

7.1.1 Interpretation. Nothing in this technical manual shall<br />

be interpreted as specifying the extent of repair or refinish<br />

except when noted defects affect the operational characteristics<br />

or tolerances of a piece of equipment.<br />

7.1.2 Technical Manuals. All activities involved with<br />

cleaning, corrosion prevention and control, and repair of C-E-<br />

M equipment or inspection and/or testing of the repaired or<br />

refurbished equipment shall use this technical manual in conjunction<br />

with <strong>TO</strong>s 1-1-8, 1-1-689-series, 1-1-691, and equipment<br />

system specific maintenance manuals as a guide for<br />

cleaning, corrosion prevention and control, and refinishing/<br />

touchup operations.<br />

7.2 CORROSION PROTECTION.<br />

All structural metals will corrode to some extent in a natural<br />

environment. When a metal corrodes, the metal atoms lose<br />

electrons and become positively charged metal ions in the<br />

electrolyte. In solution, the positively charged metal ions can<br />

combine with negatively charged ions to form corrosion products,<br />

such as metallic chlorides, oxides, hydroxides, sulfides,<br />

etc.<br />

7.3 PREVENTATIVE MAINTENANCE.<br />

As directed by AFI 21-116, the prevention and control of corrosion<br />

communications equipment is a command responsibility.<br />

Each command must place special emphasis on the<br />

importance of the corrosion control program and lend its full<br />

support to ensure that control receives sufficient priority to be<br />

accomplished along with other maintenance.<br />

7.3.1 Cleaning. Maintain the exterior and interior of equipment<br />

and components such that they will be free of grease,<br />

dirt, dust, corrosion, fungus, mold, and any other extraneous/<br />

foreign matter. Use only those cleaning processes that have no<br />

harmful or damaging effect on the equipment being cleaned.<br />

Observe all the warnings, cautions, and notes listed below as<br />

well as in other published specific cleaning procedures during<br />

all cleaning operations.<br />

• Do not use unauthorized cleaners. Although other<br />

commercial cleaners may appear to perform as<br />

well as, or better than approved products, these<br />

materials may be corrosive to metal alloys used in<br />

C-E-M equipment. They can accelerate degradation<br />

of non-metallic materials causing material<br />

failures, which may result in corrosion of surrounding<br />

metals, electrical shorts, crazing, and/or<br />

mechanical/electrical failure.<br />

• Ozone depleting substances (ODS) such as, but not<br />

limited to, 1.1.1 trichloroethane (MIL-T-81533)<br />

and trichlorotrifluoroethane (MIL-C-81302) solvents,<br />

as well as products containing them, are still<br />

used in some maintenance processes. Alternate<br />

materials continue to be identified; and wherever<br />

possible, specifications are being changed to eliminate<br />

their use automatically. Some products that<br />

have been reformulated are now flammable, so pay<br />

close attention to all CAUTION/WARNING labels<br />

on solvents and solvent-based products as well as<br />

in their MSDSs.<br />

Figure 7-1. Corroded Hardware<br />

7-1

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