a) b) a) a) a)
c) d)
a) b)
a) A A B C
B C
B
A
A B
b)
a) A A B C
B C
B
A
A B
b)
63.9 80.72
Ni
2.39 2.01
K
17.59 11.73
P
16.12 5.55
O
Atomic%
Weight%
Element
63.9 80.72
Ni
2.39 2.01
K
17.59 11.73
P
16.12 5.55
O
Atomic%
Weight%
Element
12.63 20.97
K
15.34 20.18
P
20.16 23.1
Al
1.66 1.63
Na
50.21 34.12
O
Atomic%
Weight%
Element
12.63 20.97
K
15.34 20.18
P
20.16 23.1
Al
1.66 1.63
Na
50.21 34.12
O
Atomic%
Weight%
Element Al
Ni
Corrosion layer 76.8㎛ Corrosion layer 68.1㎛ Corrosion layer 68.7㎛
Ni a)
b)
Al
Corrosion layerspallation
Corrosion layer 76.8㎛ Corrosion layer 68.1㎛ Corrosion layer 68.7㎛
Ni a)
b)
Al
Corrosion layerspallation
Al
Corrosion layer
Corrosion layer 107㎛ Corrosion layer 70.4㎛ Corrosion layer 86.9㎛
Ni a)
b) Al
Corrosion layer
Corrosion layer 107㎛ Corrosion layer 70.4㎛ Corrosion layer 86.9㎛
Ni a)
b)
a)
7.26 11.53
K
10.34 13.01
P
49.13 53.84
Al
33.28 21.62
O
Atomic%
Weight%
Element
7.26 11.53
K
10.34 13.01
P
49.13 53.84
Al
33.28 21.62
O
Atomic%
Weight%
Element
2.7 2.34
K
20.20 13.88
P
59.53 77.54
Ni
17.57 6.24
O
Atomic%
Weight%
Element
2.7 2.34
K
20.20 13.88
P
59.53 77.54
Ni
17.57 6.24
O
Atomic%
Weight%
Element b)
