冷壓延錻力の水素膨脹罐生成速度

概要

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The rate of formation of hydrogen-swells of cold-reduced strip tinplate cans weer studied with packs of Japanese canned mandarin orange, having been compared with that of hot packrolled tinplate cans. After one years storage at constant temperatnre of 37°C, the rate of hydrogen-swells in cold-reduced strip plate was 9 per cent, while that of hot-pack rolled plate (killed ingot) was as high as 69% (Fig. 2). Both sample plates were analysed and examined metallographically, and hydrogen evolution value was also determined. After definite periods of storage, vacuum, pH, titration acidity and the amount of Sn and Fe in the content of sample cans were determined. The corrosion rates and corroding potentials of the steel bases of some of the cans, in citric acid and can syrup, were also determined. The results were investigated in relation to the rate of formation of hydrogen-swells. It is shown that the high hydrogen evolution value and the low rate of hydrogen-swells formation of cold-reduced strip plate are due to the low metalloid content of strip steel and hence to the corrosion resistibility of the steel to the organic acid media.