Chapter 6. Aircraft Cleaning & Corrosion Control
Aircraft Cleaning & Corrosion Control 6-1
Corrosion Control 6-1
Types of Corrosion 6-2
Direct Chemical Attack 6-3
Electrochemical Attack 6-3
Forms of Corrosion 6-4
Surface Corrosion 6-4
Dissimilar Metal Corrosion 6-4
Intergranular Corrosion 6-5
Stress Corrosion 6-6
Fretting Corrosion 6-6
Factors Affecting Corrosion 6-7
Climate 6-7
Foreign Material 6-7
Preventive Maintenance 6-7
Inspection 6-8
Corrosion Prone Areas 6-8
Exhaust Trail Areas 6-8
Battery Compartments and Battery Vent Openings 6-8
Bilge Areas 6-8
Wheel Well and Landing Gear 6-9
Water Entrapment Areas 6-9
Engine Frontal Areas and Cooling Air Vents 6-9
Wing Flap and Spoiler Recesses 6-9
External Skin Areas 6-9
Miscellaneous Trouble Areas 6-10
Corrosion Removal 6-10
Surface Cleaning and Paint Removal 6-10
Corrosion of Ferrous Metals 6-11
Mechanical Removal of Iron Rust 6-11
Chemical Removal of Rust 6-13
Chemical Surface Treatment of Steel 6-13
Removal of Corrosion from Highly Stressed Steel Parts 6-13
Corrosion of Aluminum and Aluminum Alloys 6-13
Treatment of Unpainted Aluminum Surfaces 6-13
Treatment of Anodized Surfaces 6-14
Treatment of Intergranular Corrosion in Heat-Treated Aluminum Alloy Surfaces 6-14
Corrosion of Magnesium Alloys 6-15
Treatment of Wrought Magnesium Sheet and Forgings 6-15
Treatment of Installed Magnesium Castings 6-16
Treatment of Titanium and Titanium Alloys 6-16
Protection of Dissimilar Metal Contacts 6-16
Contacts Not Involving Magnesium 6-16
Contacts Involving Magnesium 6-16
Corrosion Limits 6-16
Processes and Materials Used in Corrosion Control 6-17
Metal Finishing 6-17
Surface Preparation 6-17
Chemical Treatments 6-18
Anodizing 6-18
Alodizing 6-18
Chemical Surface Treatment and Inhibitors 6-18
Chromic Acid Inhibitor 6-19
Sodium Dichromate Solution 6-19
Chemical Surface Treatments 6-19
Protective Paint Finishes 6-19
Aircraft Cleaning 6-19
Exterior Cleaning 6-19
Interior Cleaning 6-20
Types of Cleaning Operations 6-21
Nonflammable Aircraft Cabin Cleaning Agents and Solvents 6-21
Flammable and Combustible Agents 6-21
Container Controls 6-22
Fire Prevention Precautions 6-22
Fire Protection Recommendations 6-22
Powerplant Cleaning 6-23
Solvent Cleaners 6-23
Dry Cleaning Solvent 6-23
Aliphatic and Aromatic Naphtha 6-23
Safety Solvent 6-24
Methyl Ethyl Ketone (MEK) 6-24
Kerosene 6-24
Cleaning Compound for Oxygen Systems 6-24
Emulsion Cleaners 6-24
Water Emulsion Cleaner 6-24
Solvent Emulsion Cleaners 6-24
Soaps and Detergent Cleaners 6-24
Cleaning Compound, Aircraft Surfaces 6-24
Nonionic Detergent Cleaners 6-25
Mechanical Cleaning Materials 6-25
Mild Abrasive Materials 6-25
Abrasive Papers 6-25
Chemical Cleaners 6-25
Phosphoric-Citric Acid 6-25
Baking Soda 6-25
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