1

P. -2.3-1

2

P. -2.4,5

2007-2008

�

�

3

P. -2.3-6~9

Mg

�AlMg

� Cu Ni

�

4

P. -2.3-9~16

2009

LCA

5

P. -2.3-2

1 -1

1 -2

2 -1

2 -2

-3

6

1 -2

P. -2.3-2

0.1

0.64

0.64

7

P. -2.3-69

8

1

•0.1%

•

-

•Mg Al

Al90

• Cu Ni

Mg

Mg

9

1 -2 P. -2.3-17~28

Mg

3

1 -2 P. -2.3-18

ZK-70

AZ31

AZ91

AZ31

Ca Mg AZX-911

AZX-911

1 -2 P. -2.3-18 20

11

Ca Mg

XRF Ti 59.73% Zn 27.82% Mn 5.50% Al 3.38% Si 2.80% P 0.46%

XRF Mg 83.86% Al 13.82% Zn 1.73% Mn 0.55% S 0.039%

AZ91D 6.5 17 45 4mmANC

T 2535μ

2 -1

( wt%)

3 Mg Al Al90

3 Mg50 XRF

AM60

1 -2 P. -2.3-22~24

Y2

X1

X2

X3

X14

Y1

Y3

22 12 2

AM60

Al 8.07 6.11 5.5-6.5

Zn 0.423 0.023 0.2

Mn 0.241 0.329 0.24-0.60

Si 0.001 0.001 0.1

Cu 0.004 0.001 0.01

Ni 0.001 0.001 0.001

Fe 0.008 0.005 0.005

1. Mg Mg

0.1%

2. 3.

1.

Mg Al Al90

2. Cu Ni

1 -2 P. -2.3-28~29

13

Mg

Mg

→

Mg

14

1 -3 P. -2.3-30~40

1 -3 P. -2.3-31

Mg

Mg 99.5

74�m 90 110g/m3

125�m 500g/m3

0100200300400500600700800900

1000

0-20 20-37 37-45 45-74 74-105 105-125 125-149 149-177Particle size (µm)

Min

imum

expl

osiv

e con

cent

ratio

n (g

/m3 )

Mg

Mg

0

50

100

150

200

250

0-20 20-37 37-45 45-74 74-105 105-125 125-149 149-177

Particle size (µm)

Min

imum

igni

tion

ener

gy (m

J)

JISZ8818

4mJ

2

45�m 4 10mJ

Mg 99.5

Ca 1% Mg (AZX911)

Mg

Mg -45�m

AZX911 (d50 46.5�m)

9 mJ 300 mJ

No explosion

Over 9 J

Min

imum

Igni

tion

Ene

rgy

(MIE

) J

Air flow velocity m/s

4m/s

JISZ8818

1 -3 P. -2.3-33~34

16

: 100 μm

90 g/m3

: 7%

: 4 m/s

4 mJ

: 500

Kst : 321 [ 102 kPa m/s]

6.5 109 [Ω m] 8.3 1011 [Ω]

1 -3 P. -2.3-40

17

Mg 1. Mg Mg

2.

3.

Mg

1 -3 P. -2.3-40~41

18

19

1

-

MgMg

3 Mg Al Al Mg

- Mg

Mg

P. -2.3-28~29, 40~41

20

1

-

3

-

P. -2.3-67

21

2

-(2)-

2

22

40mm40mm

P. -2.3-42 2

23

2 -1

24

AZ AZ31

SHS AZ91 AZX911 AZ31 AZ91 SHS

AZ91 AZ31

P. -2.3-42~45

300 350MPa

350 15

SHS

AZ31

AZ31

40mm40mm

AZ31

2 -1 P. -2.3-43

25

σ σ ε

ρ

ρ

AZ31 0.64

2 -1 P. -2.3-44~45

26

Mg

AZ31

AZ31

200 250 300 h=2mm r=1 mm

60um

60um

27

2 -1 P. -2.3-46~47

AZ31

300

70

AZ31

AZ91 320

h=2mm r=1mm

AZX911 320

h=2mm r=1mm

AZ91,AZX911

2 -1 P. -2.3-48,51

28

200 250 300 ( h 4mm r 3mm

AZ91,AZX911

AZ91

-(2)-

2 -2

29

�m

400

2 -2 P. -2.3-53 55

30

362MPa

0.2 145MPa 19%

446MPa

0.2 154MPa 20%

EPMA

2 -2 P. -2.3-55

31

(a) (b)

(a) (b)(a) (b)

2 -2 P. -2.3-56 58

32

mm/year mm/year

(a)(b)

(c)

2 -2 P. -2.3-59 60

33

2

(a)0 (b)45 (c)90

(a) (b)

(c)

TD

2 -2 P. -2.3-62 64

34

-(2)-1 1. AZ31

AZ31

2. AZ91HOMO AZX911HOMO

3. AZ31

4. AZ91D

2 P. -2.3-52

35

-

1. 1 2μm

2. 2

3.

2 P. -2.3-65 66

36

37

-(2)

-(2)-1

LCA

-(2)-

2 P. -2.3-52 65

-(2)

2

Mg

38

P. -2.3-67 68

22 2010 6 3

P. -1

39

40

1 Mg 300kg/h

A 116.2kw ¥12/kw ¥1,394.4 0 ¥60/m3 ¥0

500kg ¥0.2/kg ¥100 ¥1,494.4

B 15.7kw ¥12/kw ¥188.4 18m3 ¥60/m3 ¥1,080

40kg ¥0.2/kg ¥8 ¥1,276.4

1 -2 P. -2.3-20

41

2

A ¥5.0/kg B ¥4.3/kg ¥45 60/kg

B A

1/10

A

B

Mg (10mm x 10mm x 2mm): 10g Cu (5mm x 2mm x 0.1mm) : 1g 1M (NH4)2SO4-5M NH3 0.5L 4

Cu(II)Cu

1 -2

42

Cu Ni

Mg Cu II M) Mg (%) Cu %

AZ31 0.1 0.1 90

AZ31 0.5 0.1 100

AZ91 0.1 0.1 93

AZ91 0.5 0.1 100

Ni pH9 Ni

Cu Ni (SUS304) Mg

pH

+

+ Cu(II)

+

+Cu(II) +

Cu

P. -2.3-25~28

Dis

solu

tion

rate

(10-

2 g/

cm2

/ h)

7 9 110

4

2

pH

Temp.: 60

C(Cu2+)/ mol L-1

00.020.05

Dis

solu

tion

rate

(10-

2 g/

cm2

/ h)

7 9 110

4

2

pH

Temp.: 60

C(Cu2+)/ mol L-1

00.020.05

� ��tVdtIE

0

J

1 -3 P. -2.3-34~36

V

I

I

V

J

50 mm

1500 mm

43 Mg

Mg

Mg

Mg

3000

Mg Mg

2020

Mg

Mg Mg 44

P. -2.3-68