TO 1-1-700 - Robins Air Force Base
TO 1-1-700 - Robins Air Force Base
TO 1-1-700 - Robins Air Force Base
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<strong>TO</strong> 1-1-<strong>700</strong><br />
either spray, dip, flow-on, brush, rag, or sponge and are<br />
always rinsed off with water, preferably hot.<br />
b. Type II materials are applied by either brush, rag, or<br />
sponge and do not have to be rinsed off with water, but<br />
are wiped off with clean, damp rags followed by wiping<br />
with clean, dry rags prior to painting. Type II materials<br />
leave a light, gray-white coating/film on the surface that<br />
acts as a pretreatment for painting.<br />
11.13.3.2.1.2 Type III (Inhibited). Type III materials are<br />
intended for corrosion/rust removal from chromium plated ferrous<br />
alloy surfaces and those bare ferrous alloy surfaces<br />
requiring very close dimensional tolerances. Remove very<br />
heavy rust incrustations by an appropriate mechanical method<br />
in this chapter, and heavy grease, oil, and contamination per<br />
Chapter 7 of this manual as directed by paragraph 11.13.3.1 or<br />
by vapor degreasing before application of these materials.<br />
a. Type III materials are applied by, spray, dip, flow-on,<br />
brush, or by full immersion in a tank containing the<br />
material. Parts are left in the solution tank or the solution<br />
is left on the surface of the part until the rust is<br />
dissolved or loosened sufficiently to permit easy<br />
removal, and then the residue is rinsed off the surface<br />
with fresh, tap water, preferably hot, and the part is<br />
dried. It is then ready for application of the required<br />
corrosion preventive treatment or paint system application.<br />
11.13.3.2.1.3 Type IV (Non-Foaming). Type IV materials<br />
are very similar to Type I, except that non-foaming detergents<br />
are included in the mixture. It is intended for use in pressurized<br />
spray systems at temperatures up to 150 °F (66 °C) maximum,<br />
after which it is rinsed off with fresh, tap water.<br />
11.13.3.2.1.4 Type V (Immersion Tank). Type V materials<br />
are also very similar to Type I, except no grease removing<br />
solvents are used in these materials, so they are only suitable<br />
for use on surfaces from which all grease, oil, and contamination<br />
have been completely removed by cleaning per Chapter 7<br />
of this manual as directed by paragraph 11.13.3.1. It is<br />
intended for use in immersion tanks either at ambient temperatures<br />
or at temperatures up to 140 °F (60 °C) maximum.<br />
11.13.3.2.1.5 Type VI (Brush, Spray, or Dip). Type VI<br />
materials are surface pretreatments and/or rust converters for<br />
application on either newly sand blasted or corroded/rusty<br />
steel surfaces by spray, brush, or dipping. All old grease, oil,<br />
and dirt must be removed as well as all loose and scaly rust<br />
before applying these materials. After application, they are<br />
allowed to dwell on the surface for a minimum of six hours to<br />
form a pretreatment coating on corrosion free ferrous alloys or<br />
to convert the rust on a corroded ferrous surface to a protective,<br />
pretreatment film. After a dwell time of six hours, the<br />
excess materials are rinsed off, the surface is allowed to air<br />
dry, and then the surface can be primed and painted or treated<br />
with a CPC.<br />
MIL-C-10578, COMPOUND, CORROSION REMOVING<br />
AND METAL CONDITIONING 20<br />
• High strength steel parts, those heat-treated above<br />
Rockwell C40 (180,000 PSI) tensile strength, are<br />
subject to hydrogen embrittlement when exposed<br />
to acids, therefore, use of acid rust/corrosion removers<br />
on these parts is prohibited.<br />
• Do not use acidic rust/corrosion removers if there<br />
is a danger of entrapping the materials in crevices<br />
or recesses, as they can cause corrosion in these<br />
areas.<br />
11.13.3.2.1.6 Application and Use of MIL-C-10578 Corrosion<br />
Removing Compounds. The directions for application<br />
and use of types I through type VI materials can be found<br />
in Chapter 5 of <strong>TO</strong> 1-1-691.<br />
A-A-59260 (MIL-C-14460, TYPE I), CORROSION<br />
REMOVING COMPOUND 6<br />
11.13.3.2.2 A-A-59260 (MIL-C-14460, Type I) Corrosion<br />
Removing Compound, Sodium Hydroxide <strong>Base</strong>; for<br />
Electrolytic or Immersion Application. This is a highly<br />
alkaline chemical corrosion/rust removing compound suitable<br />
for rust removal by immersion of the parts in the solution. It<br />
doesn't cause dimensional change of critical or machined surfaces,<br />
and it is safe to use on high strength steels as it will not<br />
cause hydrogen embrittlement. It can be used on small parts<br />
with or without paint, grease, or other surface coatings. The<br />
directions for application and use of these materials can be<br />
found in Chapter 5 of <strong>TO</strong> 1-1-691.<br />
11.13.4 Stainless Steel (CRES) and Nickel <strong>Base</strong>d<br />
Alloys. The following paragraphs outline chemical corrosion<br />
removal procedures for stainless steel (CRES) and nickel<br />
based alloy parts and assemblies. Table 11-5 provides procedures<br />
for removing specific types of corrosion. Chemical corrosion<br />
removal is recommended for severely corroded areas<br />
11-15