ACS - Cleaning and Corrosion Control

On aluminum corrosion visibly appears as ___________________________ or as ___________________________.

• corrosion products; white powdery substance

• rust; red flakes

• tarnish; black spots

• oxidation; green patina

How are control cables checked for corrosion on the inside of the bundle of strands?

• By visual inspection and bend test

• Stretch test test

• By applying a corrosion inhibitor

• Through ultrasonic testing

T or F: Any internal corrosion of control cables is cause for replacement.

• True

• False

What are the three (3) steps for corrosion removal?

• A. Cleaning, Priming, Painting

• B. Sanding, Coating, Sealing

• C. Washing, Drying, Polishing

• D. Scraping, Buffing, Oiling

name the most common corrosion prone areas.

• Wheel wells and wing rear spar shelf

• Battery terminals

• Avionic bays

• Exhaust systems

• Engine compartments

What causes hydrogen embrittlement?

• Absorption of hydrogen into the metal

• Excessive heat during welding

• Corrosion from saltwater exposure

• Fatigue from repeated stress

Aluminum alloys should be mechanically cleaned with ___________________________

• mechanical cleaning methods or specific cleaning agents suitable for aluminum alloys.

• water and soap only.

• any type of acid.

• steel wool.

The use of steel cleaning tools causes corrosion on aluminum because:

• Steel tools leave iron particles on aluminum, leading to galvanic corrosion.

• Steel tools chemically react with aluminum, causing it to rust.

• Steel tools physically damage the aluminum surface, exposing it to air.

• Steel tools increase the temperature of aluminum, accelerating corrosion.

The three (3) keys to corrosion prevention are:

• A. Material selection, B. Protective coatings, C. Environmental control

• A. Regular maintenance, B. Use of inhibitors, C. Proper design

• A. Cost reduction, B. Increased production, C. Aesthetic improvements

• A. Temperature control, B. Pressure monitoring, C. Vibration analysis

Name two (2) forms of sacrificial corrosion.

• galvanic corrosion and cathodic protection

• Electroplating Painting

• Anodizing Cathodic Protection

• Coating Plating