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 />
MIL-DTL-81706 (ALODINE), COATING, CHEMICAL<br />
CONVERSION 23<br />
not Liquid Oxygen (LOX) compatible. This material is a liquid<br />
concentrate material which shall be mixed with an equal<br />
volume of tap water before use; further dilution renders it<br />
ineffective. This material has a shelf life of one year from the<br />
date of manufacture; discard any of the material which has<br />
reached or exceeded its shelf life.<br />
SERMCO PASA-JELL 102, CHEMICAL CONVERSION<br />
REMOVAL FOR ALUMINUM ALLOYS 56<br />
11.13.1.2 Chemical Corrosion Removal Materials for<br />
Aluminum Alloys. SAE AMS-1640 (MIL-C-38334, Type I)<br />
Corrosion Removal Compound for <strong>Air</strong>craft Surfaces, is the<br />
authorized general chemical remover for removing corrosion<br />
products from aluminum alloys, in particular on larger areas.<br />
Limited area corrosion removal can also be accomplished by<br />
using MIL-DTL-81706 (MIL-C-81706), Class 1A Chemical<br />
Conversion Coating Solution or Semco® Pasa-Jell 102 gel<br />
type aluminum corrosion remover in conjunction with A-A-<br />
58054, Type I, Grade B or C Abrasive Mats. See Table 11-3<br />
for typical chemical corrosion removal procedures.<br />
o<br />
11.13.1.2.1.1 Application and Use of SAE AMS-1640<br />
(MIL-C-38334, Type I). The procedure for application and<br />
use of SAE AMS-1640 (MIL-C-38334, Type I) materials can<br />
be found in Chapter 5 of <strong>TO</strong> 1-1-691. After each solution<br />
application and rinse, examine the area being worked, aided<br />
with a 10X magnifier for pitting, to determine if all corrosion<br />
products have been removed. If not, repeat this process a maximum<br />
of three more times. If corrosion products remain after<br />
the fourth application of this chemical remover, use an appropriate<br />
mechanical method described in this chapter to remove<br />
the remaining corrosion products.<br />
SEMCO PASA-JELL 102, CHEMICAL CORROSION<br />
REMOVAL FOR ALUMINUM ALLOYS 56<br />
SAE AMS-1640 (MIL-C-38334), CORROSION REMOVING<br />
COMPOUND 60<br />
Do not use aluminum or any type of steel wool to<br />
apply or agitate Semco® Pasa-Jell 102 or fire will<br />
result.<br />
• Protect all magnesium surfaces from contact with<br />
SAE AMS-1640 (MIL-C-38334) corrosion removal<br />
compound and treat later, as prescribed in this<br />
manual. Steel and cadmium plated parts should<br />
also be protected from this compound, but protection<br />
of all steel and cadmium plated steel fastener<br />
heads in large structures is impractical and need<br />
not be done.<br />
• Do not allow these chemical corrosion removers to<br />
contact high strength steel. Hydrogen embrittlement<br />
may occur and cause a catastrophic failure.<br />
11.13.1.2.1 SAE AMS-1640 (MIL-C-38334, Type I) Corrosion<br />
Removing Compound Uses and Mixing Instructions.<br />
SAE AMS-1640 (MIL-C-38334, Type I) is used as a<br />
general chemical corrosion remover to remove surface and<br />
pitting corrosion products from aluminum alloy surfaces. It is<br />
Excessive use of abrasive materials and Semco®<br />
Pasa-Jell 102 can cause removal of protective cladding<br />
(Alclad) and/or excessive metal removal.<br />
11.13.1.2.2 Uses for Semco® Pasa-Jell 102. This material<br />
is a gel type chemical corrosion remover for use on aluminum<br />
alloys in limited areas, in particular where LOX<br />
compatibility is required, to remove pitting and surface corrosion<br />
or etching/oxidation. Pasa-Jell 102 is a relatively strong<br />
acid mixture that can be detrimental to equipment or components<br />
if improperly used. Therefore, it shall be used only in<br />
small areas and primarily where LOX compatibility is an<br />
essential requirement. Personnel must be properly trained and<br />
qualified to use this material for corrosion removal. The procedure<br />
for application and use of Semco® Pasa-Jell 102 material<br />
can be found in Chapter 5 of <strong>TO</strong> 1-1-691.<br />
11-11