Resources

Suggestions for Obtaining Data

Annual average of Temperature, Relative Humidity (RH), and Rain (Precipitation)

Sulfur Dioxide (SO2) Deposition

  • Annual data obtained in parts per billion (ppb) can be converted using the below formula:

Air Salinity

  • For rural areas without the pollution from traffic or industrial settlements a value less than 5 mg/m2/day can be used for the Cl concentration.
  • In urban and industrial locations, contact the municipality or state federal environmental federal agencies. Cl content in the air is not always monitored.

Sample Environments

City Country Type Rain Salinity (Chlorides) Sulfur Dioxide RH Temp. Length of Testing Actual Rate Predicted Rate
mm/y mg/m2*day mg/m2*day % °C years μm/year μm/year
Stockholm Sweden Urban 540 <5 8 72 8 2 1.0 1.0
Rio de Janeiro Brazil Marine 1250 15 40 80 22 1 1.5 1.8
Bethlehem USA Industrial 940 3 25 68 11 2 1.3 1.2
Madrid Spain Industrial 430 <5 37 63 14 2 0.7 0.9
Hanoi Vietnam Urban 1850 1 3 83 24 2 1.1 1.0
Ryda Sweden Rural 553 1 5 82 5 2 0.8 1.0
Phoenix USA Rural 207 2 3 37 22 2 0.3 0.4
Washinton, DC USA Urban 998 3 90 62 14 1 1.8 3.0
Kure Beach USA Marine 1100 91 1 77 18 1 2.0 2.0

The data shown in the above table were taken from the published literature as examples to illustrate the possible values for the environmental parameters and corrosion rate. The corrosion rates listed are the results of the environmental conditions specific to the location where the exposure was made. Each value may or may not represent the typical corrosion rate of a city where the corrosion rate may be different for different locations. The values are also specific to the year when the exposure tests were carried out since the environmental condition can vary from one year to another for the same location.