p. 106-121 - Leonardo Electronic Journal of Practices and ...
p. 106-121 - Leonardo Electronic Journal of Practices and ...
p. 106-121 - Leonardo Electronic Journal of Practices and ...
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<strong>Leonardo</strong> <strong>Electronic</strong> <strong>Journal</strong> <strong>of</strong> <strong>Practices</strong> <strong>and</strong> Technologies<br />
ISSN 1583-1078<br />
4<br />
5<br />
8.<br />
75x10<br />
x7.<br />
14x10<br />
C. R.= 5<br />
3<br />
7.<br />
76x1.<br />
43x10<br />
x2.<br />
1x10<br />
9−8<br />
8.<br />
75x7.<br />
14x10<br />
C. R.=<br />
7.<br />
76x1.<br />
43x2.<br />
1<br />
1<br />
8.<br />
75x7.<br />
14x10<br />
C. R.=<br />
=<br />
7.<br />
76x1.<br />
43x2.<br />
1<br />
C. R.=26.81 mm/y<br />
62<br />
. 475x10<br />
23.<br />
303<br />
For the 2 nd 4<br />
5<br />
1<br />
8.<br />
75x10<br />
x7.<br />
14x10<br />
62.<br />
475x10<br />
year=<br />
⇒ =13.40 mm/y<br />
5<br />
3<br />
7.<br />
76.<br />
143x10<br />
x2(<br />
2.<br />
1x10<br />
) 2(<br />
23.<br />
303)<br />
1<br />
Issue 13, July-December 2008<br />
p. <strong>106</strong>-<strong>121</strong><br />
The corrosion for the 2 nd year=corrosion rate 1 st year+estimated 2 nd year rate<br />
=16.81+13.40 = 40.12 mm/y<br />
For the 3 rd year (2005)<br />
C. R.=<br />
4<br />
5<br />
8.<br />
75x10<br />
x7.<br />
14x10<br />
5<br />
3<br />
7.<br />
76x1.<br />
43x10<br />
x3(<br />
2.<br />
1x10<br />
C. R.=8.94 mm/y<br />
The actual corrosion rate for the 3 rd year = 40.21+8.94<br />
=49.15 mm/y<br />
4000<br />
3500<br />
3000<br />
2500<br />
2000<br />
1500<br />
1000<br />
500<br />
0<br />
Dross (kg)<br />
Zinc (kg)<br />
465 470 475 480 485 490 495 500<br />
)<br />
Temperature<br />
Fig 2. Zinc consumption against galvanizing temeprature<br />
300<br />
250<br />
200<br />
150<br />
100<br />
50<br />
0<br />
465 470 475 480 485 490 495 500<br />
2003<br />
2004<br />
2005<br />
2003<br />
2004<br />
2005<br />
116
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