Corrosion

Front 1

cant prevent corrosion only midigate it true or false

Back 1

true

Hint 1

true

Front 2

dirt gease and grime can hide destructive corrosion and structural damage

Back 2

true

Hint 2

true

Front 3

galvanic corrosion

Back 3

Galvanic action occurs at the points of areas of contact where the insulation between the surfaces have broken down from dis similar metal parts in the presence of a conductor

Front 4

Dissimilar metal corrosion

Back 4

The contamination of a metal surface by mechanical means can also induce the similar metal corrosion

Front 5

Explain surface corrosion

Back 5

Appears as a general roughening etching for pitting of the surface of metal frequently accompanied by a powdery deposit of corrosion products caused by direct chemical or electrochemical attacked

Front 6

Intergranular corrosion

Back 6

Attack along the grain boundaries of an alloy commonly results from lack of uniformity in the hollow structure may exist without visible surface evidence also means exfoliate

Hint 6

Like a wet book

Front 7

Stress corrosion

Back 7

Results of the combined effect of sustained tensile stresses in a corrosive environment

usually occurs

Hint 7

Usually occurs along lines of cold working and may be transgranular and intergranular in nature bellcranks bushings gear shock strut

Front 8

filiform corrosion

Back 8

Appears of a series of small worms in the paint surface usually from improperly chemically treated prior to painted surfaces

Front 9

Extensive pitting damage may result from the contact between ?????

Back 9

Dissimilar metal parts in the presence of a conductor

Front 10

Identify the areas on aircraft that are most prone to corrosion

Back 10

Battery compartment exhaust system in trails lower area of belly wheel wells piano hinges areas of the similar metal contact welded areas inside of fuel tanks metal fittings lavatories and food service areas

Front 11

Where is filiform corrosion most likely to occur on aircraft

Back 11

Under dance coating of top coat in Mo such as polyurethane filiform is caused by improperly cured primer

Front 12

Where is intergranular corrosion most likely to occur on an aircraft

Back 12

Along the grain boundaries of aluminum that has been improperly heat treated

Front 13

Where is dissimilar metal corrosion most likely to occur on an aircraft

Back 13

Anywhere different types of metal come into contact with each other

Hint 13

Front 14

Where is stress corrosion most likely to occur on an aircraft

Back 14

In any metal component that is under constant tensile stress the metal around holes in castings that are fitted with pressed in bushings are susceptible as well

Front 15

What must be done to a piece of aluminum alloy to remove surface corrosion and treat the metal to prevent further corrosion

Back 15

Remove remove corrosion with a bristle brush or nylon scrub scrub neutralize surface with chromic acid or some type of conversion coating and paint it

Front 16

What is used to keep corrosion from forming on structural aluminum alloy

Back 16

Oxide coating or aluminum cladding

Front 17

How may rust be removed from a highly stressed metal part

Back 17

Glass bead blasting careful polishing with mild abrasive paper or by using fine buffing compound

Front 18

What tools are proper for removing corrosion from aluminum alloy

Back 18

Aluminum wool or aluminum wire brush rotary file for severe corrosion

Front 19

What is used to clean transparent plastic windshields and windows of an aircraft

Back 19

Mild soap and clean water

Front 20

What is used to neutralize electrolyte of a letter is it battery that has been spilled on an aircraft structure

Back 20

Solution of bicarbonate soda and water or vinegar

Front 21

What is used to neutralize the electrolyte of a nickel cadmium battery that is installed in an aircraft structure

Back 21

A solution of boric acid and water or vinager

Front 22

What solvent is recommended for removing grease from a fabric part doping it

Back 22

Methyl ethyl ketone Mek or lacquer thinner

Front 23

What can be used to repair the anodized surface of an aluminum alloy part

Back 23

Chemical conversion coating such as a lodine

Front 24

What type of device is used to remove surface corrosion from a piece of magnesium alloy

Back 24

Dis hog bristle brush

Front 25

How is the inside of a structural steel tubing protected from corrosion

Back 25

Tipping is filled with hot Linsee seed oil then drained,coated with hot Linseed seed oil

Front 26

Corrosion is a natural occurrence that attacks metal by electrochemical or chemical action converted back to metallic compounds true false

Back 26

true

Front 27

Slime mold fungi and other living organisms can grow on

Back 27

Damp surfaces

Front 28

Most common corrosive agents are

Back 28

Acids alkalis and salts

Front 29

The major atmosphere corrosive agents are

Back 29

Oxygen and airborne moisture

Front 30

One characteristic of water that makes it corrosive is its

Back 30

Conductivity

Front 31

Explain fungi

Back 31

Fungi are growth of microorganisms that feed on organic material

Front 32

Microbial growth should be removed by hand with a firm --------- bristle brush and water

Back 32

Non-metallic

Front 33

Polyurethane finishes are especially susceptible to

Back 33

Filiform corrosion

Front 34

What type of corrosion can occur at the interface of two heavy loaded surfaces which are not supposed to move against each other

Back 34

fretting corrosion

Front 35

In anodizing explain what happens to the aluminium alloys

Back 35

Aluminum alloys are placed in an electrolytic bath causing a thin film of aluminum oxide to form on the surface of the aluminum

Front 36

Steels are commonly played with other metals to prevent corrosion true or false?

Back 36

True

Front 37

Aluminium alloys which is acceptable to corrosion our Frequently clad with what

Back 37

Pure aluminum

Front 38

When you inspect the battery compartment what are you looking for

Back 38

Looking for electrolytic spillage corrosion and condition of protective paint

Front 39

In general any rework would involve the cleaning and shipping of all finished from crowded area removal of corrosion products and stripping of protective film true or false

Back 39

true

Front 40

What process for cleaning or finishing ferrous metals by directing a stream of abrasive particles against the surface of parts

Back 40

Abrasive blasting

Front 41

Anodizing is the most common surface treatment of what

Back 41

Aluminum alloy

Front 42

When corrosion is found around a fixed fastener head is what must be done to the fastener to ensure corrosion removal

Back 42

The fastener must be removed

Front 43

Steel wool every class steel wire brushes copper alloy rush rotary wire brushes or severe abrasive materials should not be used on aluminum surfaces true or false

Back 43

true these products and tools should not be used on any aluminum alloy surface

Front 44

The corrosion removal compound aluminium pre-tretment. Is an acid material may be used to remove corrosion products from aluminum alloy materials or items what is the product name number

Back 44

Milc - 38334

Front 45

The use of ------- -------- files should be limited to heavy corrosion and should not be used on skin tender then. 0625 inch

Back 45

Powered rotary

Front 46

Red iron rust results from _______ _______ of steel surfaces

Back 46

Atmospheric oxidation

Front 47

How would you remove corrosion from magnetic steels

Back 47

The same as high strength stainless steel methods include careful use of all the braces that claw papers fine grit aluminum oxide metallic wall or fine buffing compounds

Front 48

platings are used extensively as a protective wear resistant coating over high-strength steel what two metals are used for plating

Back 48

Nickel and chromium

Front 49

What is prohibited for the use of cleaning and removal of corrosion from titanium parts

Back 49

Who uses steel wool and scrapers or still brushes for cleaning and removal of corrosion of to tame part is prohibited

Front 50

What is an acceptable form of cleaning titanium surface

Back 50

Titanium service is Wacker cleaning and polishing with aluminum polish your mouth abrasive it permissible or with a suitable solution of sodium docromate wipe it clean but do not use water to rinse

Front 51

dirt grime and exhaust residue can be removed from an aircraft structure by using an ??

Back 51

water emulsion

Hint 51

h20

Front 52

stubborn exhaust stains can be removed from aircraft by scrubbing the area with an emulsion cleaner mixed with ??

Back 52

varsol , kerosine

Front 53

all traces of oil and grease may b removed from an aircraft surface prior to doping or painting by wiping it with dope thinner or ??

Back 53

acetone

Front 54

If a tire is covered with engine lubricating oil all of the excess oil should be removed by wiping it with a dry cloth and scrubbing it with a solution of?

Back 54

Soap and water

Front 55

Oil and grease may be removed from acrylic plastic and rubber by wiping them with the rag dampened with?

Back 55

Aliphatic naphtha

Front 56

The smallest particle of a chemical element is

Back 56

Atom

Front 57

The smallest particle of a chemical compound is a?

Back 57

Molecule

Front 58

An atom which has more electrons spinning around its Nicolas then there are protons in the nucleus is a ______________( positive or negative) ion.

Back 58

negative

Front 59

In an alloy of aluminum and copper the ______ will be eaten away by corrosion

Back 59

aluminum

Front 60

zink chromate what is the technical term

Back 60

ZnCrO4