TO 1-1-700 - Robins Air Force Base

More documents

Recommendations

Info

TO 1-1-700 MIL-L-87177, LUBRICANT, CORROSION PREVENTIVE COMPOUND, WATER DISPLACING 32 MIL-PRF-81309, LUBRICANT, CORROSION PREVEN- TIVE COMPOUND 46 2.3.24 Protection for Spare Connectors and/or Receptacles. Installed spare and/or unused connectors/receptacles with attached protective mating covers shall have these covers installed on them while they are not being used after spraying the connector/receptacle with a film of MIL-L-87177, Type I, Class B or MIL-PRF-81309, Type III, Class 2 avionics grade, water displacing, corrosion preventive compound (CPC). This will prevent corrosion and/or damage to the connectors/receptacles while not in use. 2.3.25 Moisture and Fungus Proofing. C-E-M equipment and its shelters, vans, and radomes shall be moisture proofed per procedures in Chapter 6 of this manual to prevent damage and subsequent corrosion caused by mildew, fungus, and microorganisms in tropical environments. 2-8
TO 1-1-700 CHAPTER 3 CORROSION THEORY 3.1 PURPOSE. This chapter is an introduction to corrosion theory, the causes of corrosion, and the factors which influence its development. The various forms of corrosion and the effect of corrosive environments on equipment and metals are described. The purpose of this discussion is to provide maintenance personnel with the background knowledge necessary to understand the causes of corrosion and to minimize corrosion damage. 3.2 DEFINITION OF CORROSION. Corrosion is the electrochemical deterioration of a metal because of its chemical reaction with the surrounding environment. This reaction occurs due to the tendency of metals to return to their naturally occurring states, usually oxide or sulfide ores. For example, iron in the presence of moisture and air will return to its natural state, iron oxide or rust. Aluminum and magnesium form corrosion products that are white oxides or hydroxides. When a water solution containing soluble salts is present, corrosion of many alloys can occur easily at ambient temperatures. This type of corrosion can be treated effectively by maintenance personnel as discussed in this manual. Corrosion can also occur in the absence of water, but only at high temperatures such as those found in gas turbine engines. However, the most common type of corrosion (and the one that can be most effectively treated by maintenance personnel) is electrochemical corrosion. 3.3 CHEMICAL DEFINITIONS. 3.3.1 Atom. An atom is the smallest unit of an element. There are over 100 elements, including metals such as gold, platinum, silver, carbon, titanium, copper, nickel, chromium, iron, tin, lead, uranium, aluminum, cadmium, beryllium, zinc, magnesium, and non-metals such as sulfur, hydrogen, oxygen, nitrogen, chlorine, helium, and boron. 3.3.2 Electron. An electron is a negatively charged particle much smaller than an atom. An electric current occurs when electrons are forced to move through metal conductors. Electrons flow through water solutions only in the presence of ions. 3.3.3 Ions. Atoms or groups of atoms bound together which are either positively or negatively charged. An electric current occurs when ions are forced to move through water solutions. Ions cannot move through metal conductors. 3.3.4 Electrolyte. An electrolyte is a liquid (usually water) solution containing ions. Salt water is an electrolyte; an aqueous (water) solution of sodium ions and chloride ions. Electorchemistry is the branch of chemistry concerned with chemical reactions at surfaces in contact with electrolytes. 3.4 THEORY OF CORROSION. All structural metals will corrode to some extent in a natural environment. When a metal corrodes, the metal atoms lose electrons and become positively charged metal ions in the electrolyte. In solution, the positively charged metal ions can combine with negatively charged ions to form corrosion products, such as metallic chlorides, oxides, hydroxides, sulfides, etc. Four conditions must exist before this type of corrosion can occur. • A metal which has a tendency to corrode must be present (the corroding metal is known as the anode). • A dissimilar conductive material (the cathode) which has less tendency to corrode than the anode must be present (such as a different metal, a protected part of the same metal, or conductive plastics). • A conductive liquid (electrolyte) must connect the anode and cathode (so that ions can carry electric current between them). • Electrical contact between the anode and cathode (usually in the form of metal-to-metal contact) must exist so that electrons can move from the anode, where they are released, to the cathode. Eliminating any one of the four conditions (see Figure 3-1) stops corrosion. For example: a paint film on a metal surface prevents the conducting liquid (electrolyte) from connecting the anode and cathode and stops the electric current (see Figure 3-2). Another example: two connected dissimilar metal parts placed in distilled water corrode very slowly due to a lack of ions in solution to conduct the electric current; in sea water the corrosion reaction is accelerated by a factor of 1000 or more (see Figure 3-3). 3-1
Page 1 and 2: TO 1-1-700 TECHNICAL MANUAL CORROSI
Page 3 and 4: TO 1-1-700 TABLE OF CONTENTS Chapte
Page 5 and 6: TO 1-1-700 TABLE OF CONTENTS - CONT
Page 13 and 14: TO 1-1-700 LIST OF ILLUSTRATIONS -
Page 15 and 16: TO 1-1-700 FOREWORD 1. PURPOSE. The
Page 17 and 18: TO 1-1-700 List of Related Publicat
Page 19 and 20: TO 1-1-700 SAFETY SUMMARY 1. GENERA
Page 21 and 22: TO 1-1-700 AMS-G-6032, GREASE, PLUG
Page 23 and 24: TO 1-1-700 MIL-DTL-64159, COATING,
Page 25 and 26: TO 1-1-700 MIL-PRF-27617, GREASE, A
Page 27 and 28: TO 1-1-700 O-L-164, DRESSING, LEATH
Page 29: TO 1-1-700 MIL-T-81772, THINNER, PO
Page 32 and 33: TO 1-1-700 tronics equipment and th
Page 34 and 35: TO 1-1-700 cleaning situation, syst
Page 36 and 37: TO 1-1-700 c. Riveted joints shall
Page 38 and 39: TO 1-1-700 c. Remove and replace an
Page 42 and 43: TO 1-1-700 Figure 3-1. Simplified C
Page 44 and 45: TO 1-1-700 resistant, and also at t
Page 46 and 47: TO 1-1-700 is first noticeable as a
Page 48 and 49: TO 1-1-700 3.7.8 Oxygen Concentrati
Page 50 and 51: TO 1-1-700 Figure 3-14. Concentrati
Page 52 and 53: TO 1-1-700 Figure 3-17. Galvanic Se
Page 54 and 55: TO 1-1-700 Figure 3-20. Aluminum Su
Page 56 and 57: TO 1-1-700 3.8.7 CRES/Stainless Ste
Page 58 and 59: TO 1-1-700 3.9.10 Climate. Warm, mo
Page 60 and 61: TO 1-1-700 3.11 PREVENTATIVE MAINTE
Page 63 and 64: TO 1-1-700 CHAPTER 4 COMPOSITE AND
Page 65 and 66: TO 1-1-700 4.4.4.4 Glass parts shal
Page 67 and 68: TO 1-1-700 CHAPTER 5 PACKAGING (STO
Page 69 and 70: TO 1-1-700 extent of damage dependi
Page 71 and 72: TO 1-1-700 5.15 PRECAUTIONS FOR VCI
Page 73 and 74: TO 1-1-700 c. Secure the desiccant
Page 75 and 76: TO 1-1-700 Figure 5-8. Shock Isolat
Page 77 and 78: TO 1-1-700 Figure 5-9. Examples of
Page 79 and 80: TO 1-1-700 5.24.10 Rigid or Flexibl
Page 81 and 82: TO 1-1-700 CHAPTER 6 MOISTURE AND F
Page 83 and 84: TO 1-1-700 c. 6.2.6 Felt. Examine f
Page 85 and 86: TO 1-1-700 a. After first directing
Page 87: TO 1-1-700 6.4.5.14 Terminals, scre
Page 90 and 91:
TO 1-1-700 NOTE • Authorized clea
Page 92 and 93:
TO 1-1-700 Table 7-1. Cleaning of S
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
Page 100 and 101:
Page 102 and 103:
TO 1-1-700 7.3.1.2.3 Portable, 45 g
Page 104 and 105:
TO 1-1-700 Table 7-2. Common Milita
Page 106 and 107:
TO 1-1-700 inactivity, storage, or
Page 108 and 109:
TO 1-1-700 7.5.6.5.1 Grade 1 - A th
Page 110 and 111:
TO 1-1-700 Table 7-4. Corrosion Pre
Page 112 and 113:
TO 1-1-700 Table 7-5. Preservation
Page 114 and 115:
TO 1-1-700 either case, MIL-PRF-269
Page 116 and 117:
TO 1-1-700 MIL-PRF-85285, COATING,
Page 118 and 119:
TO 1-1-700 c. Cadmium plated surfac
Page 120 and 121:
TO 1-1-700 a. Scuff sand and feathe
Page 122 and 123:
TO 1-1-700 7.7.7.2 If surface is no
Page 124 and 125:
TO 1-1-700 7.7.9.2 Where only parti
Page 126 and 127:
TO 1-1-700 7.8.1 Type I Application
Page 128 and 129:
TO 1-1-700 Extend (Loctite) 32150 J
Page 130 and 131:
TO 1-1-700 There are three ways to
Page 132 and 133:
TO 1-1-700 vulnerable surfaces clea
Page 134 and 135:
TO 1-1-700 Table 8-2. Materials, Th
Page 136 and 137:
TO 1-1-700 Table 8-4. Electronic Cl
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
TO 1-1-700 Table 8-5. Accessories o
Page 152 and 153:
TO 1-1-700 Table 8-5. Accessories o
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
Page 200 and 201:
TO 1-1-700 11.12.2 Mechanical Damag
Page 202 and 203:
TO 1-1-700 MIL-DTL-81706 (ALODINE),
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
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Page 224 and 225:
TO 1-1-700 used to apply sealants i
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
Page 232 and 233:
TO 1-1-700 below and adhere very po
Page 234 and 235:
TO 1-1-700 Table 12-2. Time Require
Page 236 and 237:
TO 1-1-700 Table 12-2. Time Require
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 242 and 243:
Page 244 and 245:
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
Page 250 and 251:
TO 1-1-700 Figure 12-14. Sealing Pr
show all

TO 1-1-700 - Robins Air Force Base

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?