Et A School Corrosion

Front 1

how much does corrosion cost the navy each year

Back 1

up to 20 billion

Front 2

when does corrosion occur

Back 2

metals contact with air, moisture, high temperatures, bacteria, chemicals, and sometimes other metals

Front 3

how can a metal be chemically broken down and oxidized

Back 3

coming in contact with a corrosive liquid or gas

Front 4

chemically corrosive contaminates

Back 4

dirt, salt, acid, gases

Front 5

conditions that must be present for electrochemical corrosion.

Back 5

anodic area, cathodic area, electrolyte, metal

Front 6

how electrochemical corrosion is stopped

Back 6

eliminating any of the four conditions

Front 7

which has the higher tendency to corrode

Back 7

anode

Front 8

catastrophic natural corrosion

Back 8

salty atmosphere

Front 9

dust from volcanic ash contains

Back 9

chlorides and sulfates

Front 10

industrial pollution, manufacturing operations, storage and shipping conditions

Back 10

man made

Front 11

chemicals associated with the industrial pollution

Back 11

carbon, nitrates, ozone, sulfur dioxide, sulfates

Front 12

man made corrosion that creates chipped and damaged equiptment

Back 12

shipment

Front 13

temperatures increase corrosion rates

Back 13

TRUE

Front 14

passive film

Back 14

barrier that forms an invisible layer of oxide

Front 15

cover of corrosion over a large surface area

Back 15

uniform

Front 16

gives stainless steel a higher level of resistance

Back 16

passive film

Front 17

metal that greatly accelerates corrosion of the other metals and accumulates a blusish green hue

Back 17

copper

Front 18

color rust most associated with steel

Back 18

red

Front 19

metal that leaves a white to gray powdery material with pitting

Back 19

Aluminum

Front 20

Metal that leaves white powdery mounds

Back 20

Magnesium

Front 21

further one metal is from another the greater the corrosion

Back 21

true

Front 22

order metals are arranged on the galvanic table

Back 22

order of relative activity in a sea water environment

Front 23

factors that determine the type of corrosion that may form

Back 23

metal type, environment, lack of protective coating

Front 24

corrosion that occurs in the absence of water at high temperatures

Back 24

oxidation

Front 25

cracking of metals caused by the combined effects of cyclic stress and corrosion

Back 25

Fatigue

Front 26

Filiform is recognized by

Back 26

wormlike trace of corrosion, products beneath paint film

Front 27

seen on the surface of pitting corrosion

Back 27

tiny pitts or holes

Front 28

first step once corrosion is detected

Back 28

begin corrective action

Front 29

procedure for exposed metals that cannot be painted or coated

Back 29

wiped down with oil

Front 30

what must paint surfaces be inspected for?

Back 30

bumps, blisters, flakes, chips and lumps

Front 31

type of cleaner used for cleaning surfaces in a corrosive environment

Back 31

mildest possible non corrosive environment

Front 32

how are the costs resulting from corrosion minimized

Back 32

early detection, identification, and treatment

Front 33

4 basic standard stages of corrosion prevention and control

Back 33

cleaning, inspection, control and protection

Front 34

least active metal, low corrosion potential, accelerates the corrosion of any metal

Back 34

carbon fiber

Front 35

tarnishes in the presence of sulfur

Back 35

Silver

Front 36

metals used as protective platings

Back 36

nickel and chromium

Front 37

with titanium, what is necessary to prevent galvanic corrosion of the other metal.

Back 37

electrical insulaiton

Front 38

corrosion that looks like sideways lightning

Back 38

intergranulated

Front 39

first indication of corrosion in aluminum and magnesium

Back 39

pitting

Front 40

corrosion recognized by an intense localized corrosion that occurs within crevices and other shielded areas.

Back 40

crevice and concentration cell