Abstract
An experimental technique is described which has been used to study the corrosion of a steel surface at elevated temperatures by condensed films of sulphuric acid. The results show that (a) the rate of corrosion of the steel increases with increasing sulphuric acid dew‐point, and (b) irrespective of the dew‐point temperature, the rate of corrosion reaches a maximum at a surface temperature of the steel lying between 20° and 45° c. below that of the dew‐point.

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