TO 1-1-700 - Robins Air Force Base

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TO 1-1-700 11.12.2 Mechanical Damage. • Do not use rotary files to remove corrosion from installed fasteners. • Use only non-powered abrasive paper, cloth, or mat, powered flap brushes or wheels, or abrasive blasting to remove corrosion from high strength steels. Other power tools can cause local overheating and/or formation of notches which can generate fatigue or stress corrosion cracking failures. • Do not use flap brushes down to within two inches from the center of the hub. Continued use beyond this limit may cause gouging due to loss of flexibility of the fiber. Follow direction of rotation, as indicated by arrow imprinted on side surface of the core. • Excessive pressure on flap brushes will cause polyurethane paint to melt, gum up, and streak around the area being worked • Protect areas adjacent to corrosion removal operations from chips, dust, and other debris which could produce dissimilar metal corrosion on previously un-corroded surfaces. • Use only those materials recommended in Tables 11-1 and 11-2 to prevent dissimilar metal particles from becoming embedded in surfaces and generating rapid galvanic corrosion. • Be careful when removing corrosion from soft plated surfaces (zinc, cadmium, etc.). Soft plating is easily damaged or removed by mechanical methods. 11.12.3 Non-Powered Tool Corrosion Removal Procedures. Remove corrosion by abrading the corroded surface with hand held tools or abrasives. This method is normally used to remove surface corrosion and other forms of mild to moderate corrosion by scraping or wearing away the corrosion products along with a minor amount of base metal. The basic steps in this procedure can be found in Chapter 5 of TO 1-1- 691 11.12.4 Powered Tool Corrosion Removal. Powered tool corrosion removal is generally done using pneumatic drills with flap brush, rotary file, sanding pad or abrasive wheel attachments. This method is normally used to remove heavy corrosion by wearing away the corrosion products. Part of the base metal is abraded away with the corrosion products using this procedure. The basic steps in corrosion removal can be found in Chapter 5 of TO 1-1-691 11.13 CHEMICAL CORROSION REMOVAL. The following paragraphs discuss chemical removal procedures for use on equipment, parts/components, and assemblies. Each type of metal alloy requires specific chemicals for removal of the different types of corrosion that are encountered on the metal alloy. The authorized chemical corrosion removal materials and procedures for their usage for each of the various metal alloys used on Air Force equipment is discussed separately for each metal alloy. Refer to Appendixes A and B in TO 1-1-691 for procurement information. 11.13.1 Aluminum Alloys. These paragraphs outline chemical corrosion removal procedures for aluminum alloy parts and assemblies of C-E-M equipment. Table 11-3 provides procedures for chemical removal of specific types of corrosion from aluminum alloys. 11.13.1.1 Preparation. Before starting chemical removal of corrosion products, perform the following procedures: a. Clean all dirt, grease, oil, and other contamination from surfaces to be worked in accordance with Chapter 7 of this manual. b. Inspect the equipment to determine which area(s) are and should be treated with a chemical corrosion removal compound. c. Mask all lap joints, hinges, faying surfaces, access doors, air scoops, and other openings that would allow the corrosion removal compound to enter interior areas or crevices, or contact unprotected magnesium, steel, and cadmium plated parts. Mask with MIL-PRF-131, Class 1 Water and Vapor Proof Barrier Material (plastic side toward the surface) and SAE AMS-T-23397, Type II (MIL-T-23397, Type II) Masking Tape. 3M Co. part No. 425 tape is the most effective tape for extensive operations, such as chemical corrosion removal and surface preparation on large structures such as aircraft exteriors during depot repaint operations. SAE AMS-1640 (MIL-C-38334), CORROSION REMOVING COMPOUND 60 11-10
TO 1-1-700 MIL-DTL-81706 (ALODINE), COATING, CHEMICAL CONVERSION 23 not Liquid Oxygen (LOX) compatible. This material is a liquid concentrate material which shall be mixed with an equal volume of tap water before use; further dilution renders it ineffective. This material has a shelf life of one year from the date of manufacture; discard any of the material which has reached or exceeded its shelf life. SERMCO PASA-JELL 102, CHEMICAL CONVERSION REMOVAL FOR ALUMINUM ALLOYS 56 11.13.1.2 Chemical Corrosion Removal Materials for Aluminum Alloys. SAE AMS-1640 (MIL-C-38334, Type I) Corrosion Removal Compound for Aircraft Surfaces, is the authorized general chemical remover for removing corrosion products from aluminum alloys, in particular on larger areas. Limited area corrosion removal can also be accomplished by using MIL-DTL-81706 (MIL-C-81706), Class 1A Chemical Conversion Coating Solution or Semco® Pasa-Jell 102 gel type aluminum corrosion remover in conjunction with A-A- 58054, Type I, Grade B or C Abrasive Mats. See Table 11-3 for typical chemical corrosion removal procedures. o 11.13.1.2.1.1 Application and Use of SAE AMS-1640 (MIL-C-38334, Type I). The procedure for application and use of SAE AMS-1640 (MIL-C-38334, Type I) materials can be found in Chapter 5 of TO 1-1-691. After each solution application and rinse, examine the area being worked, aided with a 10X magnifier for pitting, to determine if all corrosion products have been removed. If not, repeat this process a maximum of three more times. If corrosion products remain after the fourth application of this chemical remover, use an appropriate mechanical method described in this chapter to remove the remaining corrosion products. SEMCO PASA-JELL 102, CHEMICAL CORROSION REMOVAL FOR ALUMINUM ALLOYS 56 SAE AMS-1640 (MIL-C-38334), CORROSION REMOVING COMPOUND 60 Do not use aluminum or any type of steel wool to apply or agitate Semco® Pasa-Jell 102 or fire will result. • Protect all magnesium surfaces from contact with SAE AMS-1640 (MIL-C-38334) corrosion removal compound and treat later, as prescribed in this manual. Steel and cadmium plated parts should also be protected from this compound, but protection of all steel and cadmium plated steel fastener heads in large structures is impractical and need not be done. • Do not allow these chemical corrosion removers to contact high strength steel. Hydrogen embrittlement may occur and cause a catastrophic failure. 11.13.1.2.1 SAE AMS-1640 (MIL-C-38334, Type I) Corrosion Removing Compound Uses and Mixing Instructions. SAE AMS-1640 (MIL-C-38334, Type I) is used as a general chemical corrosion remover to remove surface and pitting corrosion products from aluminum alloy surfaces. It is Excessive use of abrasive materials and Semco® Pasa-Jell 102 can cause removal of protective cladding (Alclad) and/or excessive metal removal. 11.13.1.2.2 Uses for Semco® Pasa-Jell 102. This material is a gel type chemical corrosion remover for use on aluminum alloys in limited areas, in particular where LOX compatibility is required, to remove pitting and surface corrosion or etching/oxidation. Pasa-Jell 102 is a relatively strong acid mixture that can be detrimental to equipment or components if improperly used. Therefore, it shall be used only in small areas and primarily where LOX compatibility is an essential requirement. Personnel must be properly trained and qualified to use this material for corrosion removal. The procedure for application and use of Semco® Pasa-Jell 102 material can be found in Chapter 5 of TO 1-1-691. 11-11
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TO 1-1-700 TECHNICAL MANUAL CORROSI
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TO 1-1-700 TABLE OF CONTENTS Chapte
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TO 1-1-700 TABLE OF CONTENTS - CONT
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TO 1-1-700 LIST OF ILLUSTRATIONS -
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TO 1-1-700 FOREWORD 1. PURPOSE. The
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TO 1-1-700 List of Related Publicat
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TO 1-1-700 SAFETY SUMMARY 1. GENERA
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TO 1-1-700 AMS-G-6032, GREASE, PLUG
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TO 1-1-700 MIL-DTL-64159, COATING,
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TO 1-1-700 MIL-PRF-27617, GREASE, A
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TO 1-1-700 O-L-164, DRESSING, LEATH
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TO 1-1-700 MIL-T-81772, THINNER, PO
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TO 1-1-700 tronics equipment and th
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TO 1-1-700 cleaning situation, syst
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TO 1-1-700 c. Riveted joints shall
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TO 1-1-700 c. Remove and replace an
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TO 1-1-700 MIL-L-87177, LUBRICANT,
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TO 1-1-700 Figure 3-1. Simplified C
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TO 1-1-700 resistant, and also at t
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TO 1-1-700 is first noticeable as a
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TO 1-1-700 3.7.8 Oxygen Concentrati
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TO 1-1-700 Figure 3-14. Concentrati
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TO 1-1-700 Figure 3-17. Galvanic Se
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TO 1-1-700 Figure 3-20. Aluminum Su
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TO 1-1-700 3.8.7 CRES/Stainless Ste
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TO 1-1-700 3.9.10 Climate. Warm, mo
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TO 1-1-700 3.11 PREVENTATIVE MAINTE
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TO 1-1-700 CHAPTER 4 COMPOSITE AND
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TO 1-1-700 4.4.4.4 Glass parts shal
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TO 1-1-700 CHAPTER 5 PACKAGING (STO
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TO 1-1-700 extent of damage dependi
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TO 1-1-700 5.15 PRECAUTIONS FOR VCI
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TO 1-1-700 c. Secure the desiccant
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TO 1-1-700 Figure 5-8. Shock Isolat
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TO 1-1-700 Figure 5-9. Examples of
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TO 1-1-700 5.24.10 Rigid or Flexibl
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TO 1-1-700 CHAPTER 6 MOISTURE AND F
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TO 1-1-700 c. 6.2.6 Felt. Examine f
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TO 1-1-700 a. After first directing
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TO 1-1-700 6.4.5.14 Terminals, scre
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TO 1-1-700 NOTE • Authorized clea
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TO 1-1-700 Table 7-1. Cleaning of S
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TO 1-1-700 7.3.1.2.3 Portable, 45 g
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TO 1-1-700 Table 7-2. Common Milita
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TO 1-1-700 inactivity, storage, or
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TO 1-1-700 7.5.6.5.1 Grade 1 - A th
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TO 1-1-700 Table 7-4. Corrosion Pre
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TO 1-1-700 Table 7-5. Preservation
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TO 1-1-700 either case, MIL-PRF-269
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TO 1-1-700 MIL-PRF-85285, COATING,
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TO 1-1-700 c. Cadmium plated surfac
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TO 1-1-700 a. Scuff sand and feathe
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TO 1-1-700 7.7.7.2 If surface is no
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TO 1-1-700 7.7.9.2 Where only parti
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TO 1-1-700 7.8.1 Type I Application
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TO 1-1-700 Extend (Loctite) 32150 J
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TO 1-1-700 There are three ways to
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TO 1-1-700 vulnerable surfaces clea
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TO 1-1-700 Table 8-2. Materials, Th
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TO 1-1-700 Table 8-4. Electronic Cl
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Page 150 and 151: TO 1-1-700 Table 8-5. Accessories o
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Page 154 and 155: TO 1-1-700 f. Devices with permanen
Page 156 and 157: TO 1-1-700 Table 8-7. Cleaning and
Page 158 and 159: TO 1-1-700 MIL-PRF-87937, CLEANING
Page 160 and 161: TO 1-1-700 of contamination). Maint
Page 162 and 163: TO 1-1-700 8.8.2 Protective Coating
Page 164 and 165: TO 1-1-700 • Tube clamps. • Min
Page 166 and 167: TO 1-1-700 a. For bonding/grounding
Page 168 and 169: TO 1-1-700 vertently destroy the mo
Page 170 and 171: TO 1-1-700 doors, and other corrosi
Page 173 and 174: TO 1-1-700 CHAPTER 10 CORROSION PRO
Page 175 and 176: TO 1-1-700 MIL-PRF-81733, SEALING A
Page 177 and 178: TO 1-1-700 d. After corrosion is re
Page 179 and 180: TO 1-1-700 (3) Stainless/CRES steel
Page 181 and 182: TO 1-1-700 10.9 WATER ENTRAPMENT AR
Page 183 and 184: TO 1-1-700 f. Shield equipment from
Page 185 and 186: TO 1-1-700 b. Use e-inch rivnuts of
Page 187 and 188: TO 1-1-700 10.17.3 If the plating s
Page 189: TO 1-1-700 Figure 10-16. Dissipatio
Page 192 and 193: TO 1-1-700 (2) If allowable damage
Page 194 and 195: TO 1-1-700 Table 11-1. Recommended
Page 196 and 197: TO 1-1-700 11.6 3M CO. SCOTCH-BRITE
Page 198 and 199: TO 1-1-700 11.11.2 Control of Mecha
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Page 204 and 205: TO 1-1-700 11.13.2.3 Application of
Page 206 and 207: TO 1-1-700 only when there is no da
Page 208 and 209: TO 1-1-700 NOTE SEMCO PASA-JELL 101
Page 210 and 211: TO 1-1-700 (CRES), lead, ceramic, g
Page 212 and 213: TO 1-1-700 11.13.7.2 Treatment of C
Page 214 and 215: TO 1-1-700 MIL-A-46106, ADHESIVE/SE
Page 216 and 217: TO 1-1-700 Table 12-1. Sealing Comp
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Page 226 and 227: TO 1-1-700 Figure 12-2. Sealant App
Page 228 and 229: TO 1-1-700 Figure 12-4. Rivet Appli
Page 230 and 231: TO 1-1-700 Figure 12-6. Sealant Inj
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Page 238 and 239: TO 1-1-700 of 20 to 25 seconds in a
Page 240 and 241: TO 1-1-700 d. Remove all uncured se
Page 246 and 247: TO 1-1-700 Figure 12-12. Typical Me
Page 248 and 249: TO 1-1-700 may be used for low temp
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TO 1-1-700 Figure 12-14. Sealing Pr
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TO 1-1-700 - Robins Air Force Base

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