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| AN APPROXIMATE METHOD FOR CALCULATING THE CORROSION INITATION RATE—A SUPPLEMENTARY DERIVATION OF APPROXIMATE METHOD |
| Zhang Heng(Wuhan Institute of Iron and Steel Technology) |
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Abstract When the corrosion initiation rate is low and the number of samples is not great enough, the reasonable corrosion initiation rate cannot be obtained by traditional calculation. According to some logic inferences, if the samples had been corroded in a shorter test time, they should also oorroded when tested for a longer period. On the other hand, if the sampies had not been corroded in a longer test time, they should also survive when tested for a shorter period. Then a method for calculating the corrosion initiation rate approximatelly can be developed. It not only gives the result which agrees better with that obtained by traditional calculation when the corrosion initiation rate is high and the number of samples is great, but also gives a raasonable result in case where the corrosion initiation rate is low and the number of samples is not great enough.
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Received: 25 April 1989
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