The corroding solution flows at a constant rate in a cell containing the specimen. The concentration of oxygen at the outlet of the cell is measured by the polarographic method. Continuous recording of the oxygen concentration is possible. The calculation of the rate of oxygen consumption is presented together with a few examples. Corrosion tests in distilled water are possible as well as tests in mixtures of two dissolved gases. The various factors which may cause the rate of oxygen consumption to differ from the rate of corrosion are discussed. A method for computing the relative amounts of ferrous and ferric derivatives resulting from the corrosion of iron is presented.
Copyright 1951 by the National Association of Corrosion Engineers.
1951
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