Corrosivity Test of Industrial Waters

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  • 工業用水の腐食性試験
  • コウギョウ ヨウスイ ノ フショクセイ シケン

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The applicability of the method of estimating corrosion rates from cell voltage-current curves was investigated as a rapid method to evaluate the corrosivity of industrial waters.<br>Cell voltage-current curves and weight losses of mild steel were measured in 30g/l sodium chloride solution containing 6.9ppm dissolved oxygen gas at 26±1°C.<br>It was found that the corrosion rates measured by this method were in good agreement with those found by weight loss measurement, if the sweep velocity of cell voltage was less than 100mV/min and the area ratio of anode to cathode was more than 1.<br>Then, corrosion rates of mild steel in the industrial waters at Kawasaki city were measured, and it was indicated that the corrosion rates measured by this method were slightly larger than those found by weight loss measurement.

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