NCATT Chapter 10
Unless a metal part suffers direct chemical attack by acid or a mercury spill, corrosion
will only occur in the presence of_______________, and _______________________. -
answer Water, Oxygen
Chemical corrosion of aircraft parts can be caused by---among other things---acid
leaking from a battery or from fluids secreted by certain ____________________often
found in the fuel tanks. – answer Bacteria’s
_________________________________corrosion takes place when two different
metals comes in contact, either directly or through a conductive electrolyte. - answer
Electrochemical
Worm-like or thread-like traces and ridges beneath the paint film are an indication
of________________________ corrosion. – answer Filiform
In __________________________ corrosion, movement between two highly loaded
surfaces occurs, removing the protective coatings on both pieces of metal and causing
metal particles sheared from the two surfaces to combine with oxygen to form metal
oxides. - answerFretting
Solutions containing ______________________ are electrolytes that actively promote
corrosive attack on aluminum and magnesium alloys. - answerSalts
Mercury rapidly attacks and corrodes aluminum, stainless steel, and brass when it
combines chemically with those metals in a process called
_________________________. - answerAmalgamation
The high heat and _______________________________ of engine exhaust can cause
problems for exhaust components and structures in the exhaust gas path since deposits
may be trapped in gaps, seams, hinges and fairings and not reached by normal
cleaning methods. - answerCorrosive Compounds
Most reciprocating engines mounts are manufactured from welded tubular
________________________ and therefore, must be inspected for corrosion. -
answerSteel
________________________ is a form of intergranular corrosion that attacks welds in
stainless steel due to the undesirable heat treatment that occurs adjacent to the welded
area. - answerWeld Decay
Unless a metal part suffers direct chemical attack by acid or a mercury spill, corrosion
will only occur in the presence of_______________, and _______________________. -
answer Water, Oxygen
Chemical corrosion of aircraft parts can be caused by---among other things---acid
leaking from a battery or from fluids secreted by certain ____________________often
found in the fuel tanks. – answer Bacteria’s
_________________________________corrosion takes place when two different
metals comes in contact, either directly or through a conductive electrolyte. - answer
Electrochemical
Worm-like or thread-like traces and ridges beneath the paint film are an indication
of________________________ corrosion. – answer Filiform
In __________________________ corrosion, movement between two highly loaded
surfaces occurs, removing the protective coatings on both pieces of metal and causing
metal particles sheared from the two surfaces to combine with oxygen to form metal
oxides. - answerFretting
Solutions containing ______________________ are electrolytes that actively promote
corrosive attack on aluminum and magnesium alloys. - answerSalts
Mercury rapidly attacks and corrodes aluminum, stainless steel, and brass when it
combines chemically with those metals in a process called
_________________________. - answerAmalgamation
The high heat and _______________________________ of engine exhaust can cause
problems for exhaust components and structures in the exhaust gas path since deposits
may be trapped in gaps, seams, hinges and fairings and not reached by normal
cleaning methods. - answerCorrosive Compounds
Most reciprocating engines mounts are manufactured from welded tubular
________________________ and therefore, must be inspected for corrosion. -
answerSteel
________________________ is a form of intergranular corrosion that attacks welds in
stainless steel due to the undesirable heat treatment that occurs adjacent to the welded
area. - answerWeld Decay
