| 摘要 |
<p>An easily adjustable method for anodically passivating a vessel (10) containing a corrosive liquid is provided. A first electrode (26) and a reference electrode (32) are secured within the vessel (10) and a second electrode (34) is secured within a nozzle. Each electrode communicates with a corrosive liquid and each extends to the exterior of the vessel. A control means (50) has a first (52) and second input (54), connected to the vessel (10) and the reference electrode (32), a direct current output (56), connected to the first and second electrodes, and an internal setpoint. If the potential measured between the first and second inputs varies from that of the internal setpoint, the control means (50) varies the direct current output (56) supplied to the first (26) and second electrodes (34). A variable resistance means (70) is provided between the output of the control means (50) and the second electrode (34). The variable resistance means (70) may be adjusted to vary the output from the control means to the second electrode (34) so that approximately the same vessel potential may be obtained at the first (26) and second electrodes (34), that is, so that protection will be uniform throughout the vessel being passivated. Efficient passivated vessels are provided.</p> |
