| 摘要 |
<p>The cathodic protection process against corrosion according to the invention features a single electrode (12), the anode, which is connected to the positive pole of an electrical power supply, whose negative pole is connected to the object to be protected, e.g. to a boiler. According to an essential feature of the invention, the intensity of the current necessary for mantaining the process is periodically raised or lowered for a predetermined lapse of time about a predetermined percentage value relative to the steady condition value, and during this phase in which a higher or a lower current is delivered the potential difference between boiler and anode is gauged. This potential difference is compared, by means of a comparator, with a predetermined reference value, and the deviation is used for determining the current intensity during the next steady condition phase.</p> |
