Chemical Fundamentals of Corrosion in Aircraft Maintenance

What is the primary reason corrosion is most efficient in waters containing salts?

What type of corrosion is caused by direct contact between a metal and an alkaline or acidic liquid?

Which of the following can affect the theoretical rate of a chemical attack on a metal?

Which type of acid is especially active in corroding aluminum?

Which of the following is more likely to cause corrosion on aluminum structures?

What is the purpose of using a weak solution of chromic or phosphoric acid as a surface treatment on metal?

What is the mechanism by which water can cause corrosion on aluminum structures on a concrete floor?

Which type of hydraulic fluid can cause corrosion on metals?

What is the main reason that tarnish removal is critical on gold components?

What is the main advantage of using tin plating on avionic components?

What is the main issue with using tin plating on components?

What is the main reason that gold plating over silver or copper in thin layers accelerates corrosion?

What is the name of the brittle compound that can form when gold is bonded to aluminium?

What is the effect of the growth of the 'purple plague' compound on microelectronic interconnection bonds?

What is the main reason that a slight deposit will appear as a darkening of reflecting surfaces on gold?

What is the main reason that tin plating is used on avionic RF shields, filters, crystal covers, and automatic switching devices?

What is the primary cause of most corrosion encountered by aircraft maintenance engineers?

What is the main effect of corrosion on aircraft structures?

Which of the following is NOT a required component for electrochemical corrosion to occur?

What is the primary way for aircraft maintenance engineers to prevent corrosion?

Which of the following is NOT a requirement for electrochemical corrosion to occur?

What is the main purpose of the cathode in the electrochemical corrosion process?

What is the main role of the electrolyte in the electrochemical corrosion process?

Why is it almost impossible to completely prevent corrosion?

What is the primary use of nickel as a plating metal in aviation?

What can happen if scum forms along the edge of a seal in an integral fuel tank?

What is the most widely used material for aircraft construction?

What is a potential issue with using pure nickel as an electroless coating?

Which of the following is a characteristic of aluminium alloys?

What is the primary use of copper and copper-based alloys in avionics systems?

Why is aluminium considered anodic?

What is a common sign of copper corrosion in aviation?

What is the effect of changes in the surface condition of copper and copper-based alloys in aviation?

What can happen when aluminium comes into contact with other metals?

What is the purpose of adding nickel to stainless steel alloys?

What can help increase the corrosion resistance of aluminium under mild corrosive conditions?

What is the main drawback of using aluminium in aircraft construction?

What is a potential issue with using nickel-based alloys in high-temperature areas like engines?

What is the main reason why no metal is totally resistant to corrosion?

What might be a visible sign indicating the presence of pitting corrosion on a metal surface?

What is the result if pitting corrosion continues untreated?

How are aluminium alloys primarily held together according to micro-photographs?

What effect does heat treatment have on aluminium alloy during the process?

What is a characteristic sign that intergranular corrosion may be occurring?

What can happen if uniform surface corrosion progresses to pitting, and pitting remains untreated?

How are the grains in aluminium alloys held together in micro-photographs?

What type of appearance may suggest the presence of intergranular corrosion?

What is the primary cause of galvanic corrosion in aircraft structures?

What is the main effect of stress corrosion on aircraft structures?

What is the primary effect of surface corrosion on aircraft structures?

What is the main purpose of removing tarnish from gold components in aircraft?

What is the primary reason that corrosion is most efficient in waters containing salts?

What is the main reason that aluminium is considered anodic?

What is the main drawback of using aluminium in aircraft construction?

What is the primary use of copper and copper-based alloys in avionics systems?

What is the main cause of fretting corrosion?

What is a characteristic of exfoliation corrosion?

In what scenario does fretting corrosion typically occur?

What distinguishes exfoliation corrosion from other types of corrosion?

How can fretting corrosion be visually identified around rivets?

What is the consequence of debris not being able to escape between surfaces affected by fretting corrosion?

Why is it important to replace rivets showing signs of fretting corrosion promptly?

What distinguishes exfoliation corrosion from other forms of corrosion in terms of affected materials?

What happens to the strength of a metal affected by intergranular corrosion?

How do microbes contribute to corrosion in aircraft fuel tanks?

What is the recommended remedy for exfoliation corrosion on aircraft structures?

In what type of conditions can water entrained in aircraft fuel condense out?

What role does the dark insides of fuel tanks play in microbiological corrosion?

How do microbes in aircraft fuel tanks feed and grow?

What is the primary reason for the corrosion rate of magnesium alloys increasing when immersed in water or subjected to moisture?

What is the primary concern regarding the use of titanium at high temperatures?

What is the primary reason for the need to electrically insulate titanium from other metals?

Which statement is true regarding the oxide film formed on titanium and its alloys?

What is a potential issue when titanium comes into contact with a corroding metal?

Which statement is true regarding the corrosion resistance of titanium and its alloys?

What is a potential issue with certain titanium alloys when exposed to chlorides or chlorinated solvents?

What is the primary reason for the high corrosion resistance of titanium and its alloys?