TO 1-1-700 - Robins Air Force Base

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TO 1-1-700 MIL-DTL-81706 (ALODINE), COATING, CHEMICAL CONVERSION 23 NOTE MIL-DTL-81706 (MIL-C-81706)/MIL-DTL-5541, Class 1A Chemical Chromate Conversion Coating, shall be applied immediately after the final rinse when corrosion removal is the last process of a rework operation, or when the item or area will be painted. 11.13.1.2.3 MIL-DTL-81706 (MIL-C-81706), Class 1A, Uses and Mixing Instructions. Chemical chromate conversion coating solutions are used for limited area corrosion removal from aluminum alloy surfaces while simultaneously applying a chemical chromate conversion coating. a. This can be accomplished by using a MIL-DTL-81706 (MIL-C-81706), Class 1A solution in conjunction with an A-A-58054, Type I, Grade C Abrasive Mat. This material helps to clean an area by oxidizing all organic soils on the aluminum alloy surface, while the abrasive mat acts to remove the corrosion products, and then the solution forms a chemical chromate conversion coating film on the aluminum alloy surface. If organic soils are present, they will turn green upon application of the solution. b. The green residue and the solution contaminated with the residue should be wiped from the surface and discarded. Mix the MIL-DTL-81706, Class 1A solution in accordance with the manufacturer's instructions and Section II of Chapter 5 in TO 1-1-691. c. It is recommended that the technician practice on some condemned components or parts prior to using this material on serviceable aircraft, missile, or equipment aluminum alloy parts. Table 11-3. Typical Chemical Corrosion Removal Procedures for Aluminum Alloy Parts and Assemblies Type of Corrosion Step 1 Corrosion Removal Step 2 Surface Treatment (When applicable) Step 3 Final Protective Paint Finish (When applicable) Light or heavy pitting or etching of aluminum alloys (clad) Remove corrosion with SAE AMS-1640 (MIL- C-38334, Type I) per Chapter 5 in TO 1-1-691 MIL-DTL-81706/MIL-DTL- 5541, Class 1A per Section II of Chapter 5 in TO 1-1-691 See TO 1-1-8 and equipment system specific maintenance manuals for paint system Light or heavy pitting or etching of aluminum alloys (non-clad) Remove corrosion with SAE AMS-1640 (MIL- C-38334, Type I) per Chapter 5 in TO 1-1-691 followed by appropriate mechanical methods in this chapter if necessary As above As above Intergranular or exfoliation corrosion of aluminum alloys Not applicable. Remove corrosion by appropriate mechanical methods in this chapter As above As above Light or heavy pitting or etching on small aluminum alloy parts which can be removed for treatment Remove corrosion and/or oxide film by immersion in a SAE AMS-1640 (MIL-C- 38334, Type I) prepared per Chapter 5 in TO 1-1-691 Immersion in MIL-DTL- 81706, Class 1A solution per Section II of Chapter 5 in TO 1-1-691 As above 11-12 Change 1
TO 1-1-700 11.13.1.2.3.1 Application of MIL-DTL-81706 (MIL-C- 81706), Class 1A Solutions for Corrosion Removal. The procedures for application of these materials for corrosion removal are the same as those cited in Section II of Chapter 5 in TO 1-1-691 for the standard chemical chromate conversion coating solutions, except as follows: a. The small area requiring corrosion removal and surface treatment can be cleaned with the chemical chromate conversion coating solution instead of cleaning with cleaning solutions, rinsing, and drying before application of the solution. Thoroughly wet or flood the area being worked with the solution and keep it wet with solution until all phases of the process are completed and the final film is formed to prevent streaking and/or powdering on the surface. Lightly abrade the surface while wet with the solution using a A-A-58054, Type I, Grade C Abrasive Mat. b. If the solution turns green, continue to abrade the entire area until it is completely cleaned, and then wipe all dirty solution from the surface with a sponge. This should leave a bright, shiny surface. If dark spots or lines are seen in the area, this indicates the presence of residual spots of moderate to severe corrosion. c. Reapply the solution and vigorously agitate the wetted area with an abrasive mat as before. If the corrosion is not completely removed after this second application of solution, remove the remaining corrosion using an appropriate mechanical method in this chapter. MIL-DTL-81706 (ALODINE), COATING, CHEMICAL CONVERSION 23 d. After corrosion removal is complete and the dirty solution is removed, reapply MIL-DTL-81706, Class 1A to form a MIL-DTL-5541, Class 1A film on the surface and allow the film to form in accordance with procedures in Section II of Chapter 5 in TO 1-1-691. 11.13.2 Magnesium Alloys. The following paragraphs outline chemical corrosion removal procedures for the removal of corrosion from magnesium alloy parts. Table 11-4 provides procedures for the removal of specific types of corrosion. NOTE Removable parts can be treated more effectively by applying one of the electro-deposition conversion coatings, such as Type IV or VII of SAE AMS-M- 3171 (MIL-M-3171) after corrosion removal instead of the brush on Type VI coating specified for coating repair after corrosion removal from small areas discussed here. 11.13.2.1 Preparation. Before starting chemical removal of corrosion products remove paint from the area per TO 1-1-8 and clean all grease, oil, and other contamination from surfaces to be worked in accordance with Chapter 7 of this manual. If practical, use one of the procedures for cleaning magnesium alloys by immersion, spray, or vapor blast included in SAE AMS-M-3171 (MIL-M-3171). A-A-55827, CHROMIUM TRIOXIDE 2 Do not allow rags, brushes, abrasive mats, or any other item soaked with A-A-55827 chromic acid or the chromic acid pickle solution prepared with it to come in contact with any organic solvent (MEK, acetone, paint thinner, A-A-59601/MIL-PRF-680 dry cleaning solvent, etc.) or fire will result. Do not allow excessive amounts of anions such as chlorides, sulfates, or fluorides to build up in the solution; they tend to coat or etch the metal surface rather than removing corrosion products. Do not reuse old solutions; prepare fresh solutions for each separate removal operation. 11.13.2.2 Chemical Corrosion Removal Materials for Magnesium Alloys. Chromic acid pickle solution which is a mixture of A-A-55827, Chromium Trioxide, in water may be used to remove surface oxidation and light corrosion from magnesium alloy surfaces. The procedure for application and use of chrome pickle solution, a mixture of A-A-55827 Chromium Trioxide in water, can be found in Chapter 5 of TO 1-1- 691. NOTE Chromic acid pickle is not adequate for removal of deep pitting, heavy corrosion, sand or other blast media residue, or the effects of blasting which will require use of one of the mechanical methods described in this chapter. If properly used, this chemical method removes much less metal causing much less reduction of sectional thickness than mechanical methods, but it shall not be used on parts containing copper or steel inserts unless they are completely masked off. Change 1 11-13
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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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TO 1-1-700 Table 8-5. Accessories o
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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
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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 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 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 - Robins Air Force Base

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