types

Question 1

occurs at attachment points (like antenna) with build-up

Answer 1

galvanic

Question 2

decay of metals as they combine with oxygen forms

Answer 2

metallic oxides

Question 3

forms a strong anodic galvanic cell when in contact with other metals and is always attacked

Answer 3

magnesium

Question 4

type of aluminum alloys used on naval aircraft

Answer 4

nonclad

Question 5

by metabolic activity of bacteria

Answer 5

biological

Question 6

caused by an external current leaving the hull and entering the seawater

Answer 6

stray-current

Question 7

common on aboveground pipes exposed to the air

Answer 7

atmospheric

Question 8

part of the aircraft that receives the most punishment

Answer 8

wheel well

Question 9

attack on grain boundaries, hard to identify visually, may look like sand grains

Answer 9

intergranular

Question 10

in-depth info on structural corrosion- NAVAIR_____

Answer 10

01-1A-509

Question 11

occurs at antenna attachment points

Answer 11

galvanic

Question 12

localized areas with stagnant moisture or solution

Answer 12

concentration cell

Question 13

found in the vicinity of the shaft, props, or other protruding underwater components

Answer 13

cavitation

Question 14

caused by the electrolytic action of a galvanic cell

Answer 14

localized

Question 15

all metals consist of tiny building blocks called what

Answer 15

crystals (grain boundaries)

Question 16

what alloys used in aircraft have a cadmium-plated finish to prevent surface straining and decay and patina

Answer 16

copper

Question 17

filiform corrosion occurs independently of light, metallurgy, and microorganisms present. takes place when relative humidity is __-__%

Answer 17

78-90%