Simulation of Outdoor Atmospheric Corrosion of Carbon Steel in Wet Tropics from Three-Month and One-Year Tests
P. V. Strekalov* and Do Thanh Binh**
* Institute of Physical Chemistry, Russian Academy of Sciences,
Leninskii pr. 31, Moscow, 119991 Russia
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** Institute of Tropical Technology, Vietnamese Academy of Sciences and Technology,
Hoang Quoc Viet, Hanoi, Vietnam
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Received September 16, 2004
Abstract — Mathematical models of the kinetics of outdoor atmospheric corrosion of metals were approved for a plain 
3 carbon steel in the wet tropics of Vietnam and periods from 0.5 to 10 years by the results of 3-month and one-year outdoor atmospheric tests. The least deviation of the predicted from actually observed corrosion rate were observed for the time periods ranging from 1.5 to 2 years (the minimum error 
= 0.05%; the maximum = 12.7%). The average error of the predicted estimates, for all the models employed, falls into a rangefrom 10.9 to 41.4% for 3–5 years. However, for 10 years, it ranges either from 39.9 to 62.5% or from 4.8 to 38.9% depending on whether the results of 3-month or one-year outdoor tests were used, respectively. Past century data on the corrosion resistance of a 
3 steel were also used as the initial, whereas the calculated corrosion rates were compared to the most recent results of testing the steel in the rural atmosphere of North Vietnam (suburban district of Hanoi). The maximum prediction error ( = 23–139%) corresponds to calculations based on the tests for three winter months; the minimum (= 8–54%), to those for three months in summer.
3 carbon steel in the wet tropics of Vietnam and periods from 0.5 to 10 years by the results of 3-month and one-year outdoor atmospheric tests. The least deviation of the predicted from actually observed corrosion rate were observed for the time periods ranging from 1.5 to 2 years (the minimum error = 0.05%; the maximum = 12.7%). The average error of the predicted estimates, for all the models employed, falls into a rangefrom 10.9 to 41.4% for 3–5 years. However, for 10 years, it ranges either from 39.9 to 62.5% or from 4.8 to 38.9% depending on whether the results of 3-month or one-year outdoor tests were used, respectively. Past century data on the corrosion resistance of a 3 steel were also used as the initial, whereas the calculated corrosion rates were compared to the most recent results of testing the steel in the rural atmosphere of North Vietnam (suburban district of Hanoi). The maximum prediction error ( = 23–139%) corresponds to calculations based on the tests for three winter months; the minimum (= 8–54%), to those for three months in summer.