| 摘要 |
<PICT:1021670/C6-C7/1> To prevent corrosion of a rotating drum, disc, cylinder or roller, e.g. the drying roller of a paper making machine, an electrode is provided which is in contact with the roller through an electrolyte. If the roller is dry, an electrolyte may be circulated through the electrode 22 to its surface, insulating blocks 21 being provided around the electrode. The electrode may act to clean or polish the roller, and if a metal electrolyte is used the roller may be coated with metal. |
