Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
18 Cards in this Set
- Front
- Back
|
Galvanic Corrosion |
Galvanic corrosionoccurs when different metals are in contact with eachother and an electrolyte, such as sea water. It is usuallyrecognizable by the presence of a buildup of corrosiondeposits at the joint between the metals.
|
|
|
Pitting Corrosion |
pitting is holes in metal and can be detected by gray or white powdery deposits. Stainless steel is most susceptible. |
|
|
Intergranular Corrosion |
an attack on the grain boundaries of metal. High strength aluminum alloys are most susceptible. |
|
|
Exfoliation Corrosion |
An advanced form ofintergranular corrosion where the surface grains of ametal are lifted up by the force of expanding corrosionproducts occurring at the grain boundaries
|
|
|
Crevice Corrosion |
Occurs in a crevice where stagnant solution has pooled. |
|
|
Aluminum Alloy |
White to grey powder |
|
|
Magnesium Alloy |
White, powdery, snowlike mounds, and white spots on surface
|
|
|
Carbon and low alloy steel |
rust |
|
|
Stainless steel |
rough surface, red brown or black stain |
|
|
Titanium Alloy |
No visible corrosion products at low temperature.Colored surface oxides develop above700° F (370° C)
|
|
|
Cadmium |
white powdery deposits to black or brown multing on the surface |
|
|
Chromium |
no visible corrosion |
|
|
Nickel based alloy |
green powdery deposits |
|
|
Electroless nickel |
Nickel does not corrode, but promotes corrosionof aluminum base metal where pits occur in theplating
|
|
|
copper based alloy, brass or bronze |
blue or blue green powdery deposits |
|
|
Silver |
Brown to black film |
|
|
gold |
deposits cause blackening of reflective surfaces |
|
|
Tin |
whisker(?) like deposits |
