| 摘要 |
This invention is directed to an improved process for treating steel carrier core surfaces which comprises providing a steel carrier core composition, oxidizing in the air stream the surface of the carrier core at a temperature of from about 500 degrees Fahrenheit to about 1,000 degrees Fahrenheit, adding water to the air stream prior to accomplishing the oxidation reaction, at a partial pressure of water in excess of 20 millimeters of mercury, thereby resulting in carrier cores having a resistance of from about 105 ohm-cm to about 1012 ohm-cm.
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