M6 Combined Flashcards
1
Q
In what conditions does wet corrosion take place
A
60% humidity
2
Q
Factors that can cause erosion
A
- different metals in contact
- size of material
- environmental condition (hot/cold and wet/dry)
- lack of a finish or filling
3
Q
What’s the cause of intergranual corrosion
A
During the manufacturing process when the metal isn’t quenched within 10 seconds of being removed from heat
4
Q
What can happen if filiform erosion isn’t removed
A
Can lead to intergranular corrosion
5
Q
What’s the best way of corrosion control
A
Prevention not removal
6
Q
Why does crevice corrosion occur
A
Because of stagnant water within a scratch or hole which causes an imbalance in oxygen
7
Q
What are the two common nickel alloys and what are they made up of
A
Monel- 68% nickel and 29% copper
Inconel- 80% nickel and 14% chromium
