ab – 1 Estimated life of galvanized iron sheets in different atmospheric conditions

Zinc coating weight

Rural

Tropical marine

Suburban

Urban

Highly industrial

gsm

Years

Years

Years

Years

Years

600

40

40

30

25

15

375

30

30

20

17

9

300

20

20

12

10

7

180

8

8

5

4

3

100

6

6

4

3

2

ab – 1 Estimated life of galvanized iron sheets in different atmospheric conditions

Zinc coating weight

Rural

Tropical marine

Suburban

Urban

Highly industrial

gsm

Years

Years

Years

Years

Years

600

40

40

30

25

15

375

30

30

20

17

9

300

20

20

12

10

7

180

8

8

5

4

3

100

6

6

4

3

2