General Atmospheric Corrosion Rates Comparison of Metals (ISO Corrosion Classes)

CATEGORIES OF CORROSIVITY OF THE ATMOSPHERES
Category Corrosivity
C1 Very low
C2 Low
C3 Medium
C4 High
C5 Very high

One-Year Corrosion Loss of Flat Metal Samples After One-Year Exposure at Various Test Sites

Unalloyed Steel   Zinc (Hot-Dip Galvanized)   Copper   Aluminum
Test Site mm/yr.   Test Site mm/yr.   Test Site mm/yr.   Test Site mm/yr.
Panama CZ 373.0   Panama CZ 17.50   Panama CZ 5.46   Auby 1.70
Auby 106.0   Auby 5.60   Biarritz 3.69   Ostende (B) 1.50
Ostende (B) 99.3   Ostende (B) 5.10   Kopisty 3.30   Jubay-Antarctic 1.31
Biarritz 87.2   Salin de Gir. 4.60   Salin de Gir. 3.20   St. Denis 1.20
Okinawa 75.2   Biarritz 4.30   Ostende 3.10   Biarritz 1.20
Salin de Gir. 73.0   Borregaard 3.80   Kure Beach 2.85   Ponteau Mart 1.00
Ponteau Mart. 72.4   Kopisty 3.50   Kvarnvik 2.80   Paris 0.90
Kopisty 70.7   Okinawa 3.40   Ponteau Mart 2.70   Murmansk 0.80
Borregaard 61.7   Tanager 3.00   Res Triang Park 2.43   Salin de Gir. 0.70
Kvarnvik 61.6   Paris 3.00   Point Reyes 2.42   Kopisty 0.70
Tananger 59.6   Praha 2.80   Camet 2.23   St. Remy 0.70
Rye 58.5   Ponteau Mart 2.60   Okinawa 2.10   Tanager 0.60
Praha 47.4   Rye 2.54   Jubay-Antarctic 2.04   Praha 0.60
St. Remy 44.1   Vladivostok 2.30   Batumi 2.00   Kvarnvik 0.60
Caracaido 43.9   Birkenes 2.30   Kasperske Hory 2.00   Borregaard 0.60
Choshi 43.3   Bergen 2.10   Tanager 1.90   Panama CZ 0.57
Paris 41.7   Kure Beach 2.01   Auby 1.90   Los Angeles 0.56
Point Reyes 40.1   Newark 1.96   Rye 1.86   Tokyo 0.54
Tokyo 39.5   Kasperske Hory 1.90   St. Remy 1.80   Kasperske Hory 0.50
Fleet Hall 39.0   Jubay-Antarctic 1.87   Kattesand 1.70   Rye 0.42
Stratford 38.7   Kvarnvik 1.80   Murmansk 1.70   Boucherville 0.40
Kure Beach 37.9   Point Reyes 1.73   Vladivostok 1.40   Kattesand 0.40
Crowthorne 37.4   Stratford 1.67   Paris 1.40   Fleet Hall 0.36
St. Denis 37.2   Iugazu 1.62   Picherande 1.40   Choshi 0.33
Camet 36.8   Bergisch Glad. 1.60   Borregaard 1.40   Picherande 0.30
Jubay-Antarctic 36.6   Batumi 1.60   Newark 1.39   Vladivostok 0.30
Bergisch Glad. 36.2   Kattesand 1.50   Jedgeford 1.36   Helsinki 0.30
Kattesand 35.2   St. Remy 1.50   Choshi 1.35   Bergisch Glad. 0.30
Helsinki 33.3   St. Denis 1.50   Praha 1.30   Stratford 0.29
Murmansk 30.8   Tokyo 1.50   Birkenes 1.30   Kure Beach 0.29
Batumi 28.7   Boucherville 1.40   Baracaldo 1.20   Newark 0.28
Bergen 27.9   Choshi 1.40   St. Denis 1.20   Okinawa 0.26
Madrid 27.7   Fleet Hall 1.34   Los Angeles 1.16   Point Reyes 0.22
Lagoas 26.9   Helsinki 1.30   Stratford 1.13   Stockholm Vana 0.20
Newark 26.4   Oslo 1.30   Crowthorne 1.10   Oslo 0.20
Kasperske Hory 26.0   Camet 1.26   El Pardo 1.10   Lagoas 0.20
Vladivostok 25.9   Baracaldo 1.20   Boucherville 1.10   Baracaldo 0.20
Otaneiemi 25.6   Crowthorne 1.10   Bergen 1.00   Camet 0.19
Oslo 25.2   Murmansk 1.10   Lagoas 1.00   Crowthorne 0.12
Stockholm Vana 24.4   Los Angeles 1.09   Fleet Hall 0.93   Res Triang Park 0.11
Boucherville 23.2   Buenos Aires 1.01   Iugazu 0.80   Birkenes 0.10
Res Triang Park 23.1   Lagoas 1.00   Otaniemi 0.80   Ahtari 0.10
Los Angeles 21.4   Otaniemi 0.90   Svanvik 0.80   Batumi 0.10
Svanvik 20.2   Picherande 0.90   Helsinki 0.70   Otaniemi 0.10
Birkenes 19.7   Res Triang Park 0.84   Ahtari 0.70   Bergen 0.10
Judgeford 19.3   Svanvik 0.80   Tokyo 0.66   Svanvik 0.10
Buenos Aires 16.2   Ahtari 0.70   Buenos Aires 0.64   Madrid 0.07
Picherande 16.1   Judgeford 0.66   Bergisch Glad. 0.60   Oymyakon 0.07
El Pardo 15.5   Stockholm Vana 0.60   Stockholm Vana 0.60   Judgeford 0.06
Ahtari 12.8   Madrid 0.60   Oslo 0.60   Iugazu 0.05
Iugazu 5.8   El Pardo 0.50   Madrid 0.50   Buenos Aires 0.05
San Juan 4.6   Oymyakon 0.40   San Juan 0.18   El Pardo 0.05
Oymyakon 0.8   San Juan 0.18   Oymyakon 0.09   San Juan 0.03
Source: W. W. Kirk and H. H. Lawson, eds., Atmospheric Corrosion, STP1239, ASTM, 1990. Reprinted, with permission, copyright ASTM.

Atmospheric Corrosivity Ranking of Steel and Zinc at Various Test Sites Two-Year Exposure

Ranking   Weight Loss (g) Loss Ratio
Steel Zinc Location Steel Zinc Steel/Zinc
1 1 Norman Wells, NWT, Canada 0.73 0.07 10.4
2 2 Phoenix, AZ 2.23 0.13 17.2
3 3 Saskatoon, SK, Canada 2.77 0.13 21.3
4 4 Esquimalt, Vancouver Island, BC, Canada 6.50 0.21 31.0
5 15 Detroit, MI 7.03 0.58 12.1
6 5 Fort Amidor Pier, Panama, C.Z. 7.10 0.28 25.4
7 11 Morenci, MI 9.53 0.53 18.0
8 7 Ottawa, ON, Canada 9.60 0.49 19.6
9 13 Potter county, PA 10.00 0.55 18.2
10 31 Waterbury, CT 11.00 1.12 9.8
11 10 State College, PA 11.17 0.51 21.9
12 28 Montreal, PQ, Canada 11.44 1.05 10.9
13 6 Melbourne, Australia 12.70 0.34 37.4
14 20 Halifax (York Redoubt), NS, Canada 12.97 0.70 18.5
15 19 Durham, NH 13.30 0.70 19.0
16 12 Middletown, OH 14.00 0.54 25.9
17 30 Pittsburgh, PA 14.90 1.14 13.1
18 27 Columbus, OH 16.00 0.95 16.8
19 21 South Bend, PA 16.20 0.78 20.8
20 18 Trail, BC, Canada 16.90 0.70 24.1
21 14 Bethlehem, PA 18.30 0.57 32.1
22 33 Cleveland, OH 19.00 1.21 15.7
23 8 Miraflores, Panama, C.Z. 20.90 0.50 41.8
24 29 London (Battersea), England 23.00 1.07 21.5
25 24 Monroeville, PA 23.80 0.84 28.3
26 35 Newark, NJ 24.70 1.63 15.2
27 16 Manila, Philippine Islands 26.20 0.66 39.7
28 32 Limon Bay, Panama, C.Z. 30.30 1.17 25.9
29 39 Bayonne, NJ 37.70 2.11 17.9
30 22 East Chicago, IN 41.10 0.79 52.0
31 9 Cape Kennedy, FL (1/2 mile from ocean) 42.00 0.50 84.0
32 23 Brazos River, TX 45.40 0.81 56.0
33 40 Pilsey Island, England 50.00 2.50 20.0
34 42 London (Stratford), England 54.30 3.06 17.7
35 43 Halifax (Federal Building), NS, Canada 55.30 3.27 16.9
36 38 Cape Kennedy, FL (60 yards from ocean, 60-ft. elevation) 64.00 1.94 33.0
37 26 Kure Beach, NC (800-ft. lot) 71.00 0.89 79.8
38 36 Cape Kennedy, FL (60 yards from ocean, 30-ft. elevation) 80.20 1.77 45.3
39 25 Daytona Beach, FL 144.00 0.88 163.6
40 44 Widness, England 174.00 4.48 38.8
41 37 Cape Kennedy, FL (60 yards from ocean, ground level) 215.00 1.83 117.5
42 34 Dungeness, England 238.00 1.60 148.8
43 17 Point Reyes, CA 244.00 0.67 364.2
44 41 Kure Beach, NC (80-ft. lot) 260.00 2.80 92.9
45 45 Galeta Point Beach, Panama, C.Z. 336.00 6.80 49.4
Source: W. W. Kirk and H. H. Lawson, eds., Atmospheric Corrosion, STP1239, ASTM, 1990.
Reprinted with permission, copyright ASTM