Corrosion Prevention and Control Flashcards
7 cards from real AAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Corrosion Prevention and Control flashcards as text
What is stress corrosion cracking (SCC) and what conditions promote its development?
Answer: Cracking that occurs when sustained tensile stress and a corrosive environment act simultaneously on a susceptible metal
Stress corrosion cracking occurs when a susceptible metal is subjected to both sustained tensile stress and a corrosive environment simultaneously, leading to crack initiation and propagation that can cause sudden fracture.
What type of primer is specified for use on Army aircraft to provide corrosion protection beneath the topcoat paint system?
Answer: Epoxy polyamide primer with corrosion-inhibiting pigments such as strontium chromate
Epoxy polyamide primer with corrosion-inhibiting pigments (such as strontium chromate or zinc phosphate) is the standard Army aircraft primer, providing excellent adhesion and active corrosion inhibition.
What inspection techniques are required when checking for corrosion in hidden or inaccessible areas of an Army aircraft?
Answer: Borescope inspection, moisture testing, and checking drain holes for obstruction
Inspection of hidden areas requires borescope inspection, checking for moisture accumulation, verifying drain holes are clear and functional, and applying non-destructive inspection (NDI) methods as specified in the technical manual.
Under Army maintenance regulations, who is authorized to perform corrosion treatment on aircraft structural components?
Answer: Qualified aviation mechanics with the appropriate MOS and documented training on the specific aircraft
Only qualified aviation mechanics with the appropriate Military Occupational Specialty (MOS) and documented training on the specific aircraft system are authorized to perform corrosion treatment on structural components.
What must be done after treating corrosion on an Army aircraft to restore protection to the affected area?
Answer: Restore the full protective finish system including primer and topcoat paint per technical manual specifications
After corrosion treatment, the complete protective finish system — including primer and topcoat paint — must be restored per the applicable technical manual to re-establish full corrosion protection.
How must corrosion findings and treatment actions be recorded in the Army aviation maintenance documentation system?
Answer: Recorded in TAMMS-A using DA Form 2404 for the discrepancy and DA Form 2408-13-1 for the corrective action
All corrosion findings must be recorded in TAMMS-A; the discrepancy is documented on DA Form 2404 and the corrective maintenance action is recorded on DA Form 2408-13-1.
Why is the galvanic series an essential reference tool for Army aircraft corrosion prevention?
Answer: It ranks metals by electrochemical potential, indicating which metal will corrode when dissimilar metals are placed in contact
The galvanic series ranks metals by their electrochemical potential; when two metals at different positions contact each other with an electrolyte present, the less noble (more anodic) metal will corrode preferentially.