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为了成功地用电化学技术去预测电偶腐蚀,必须在仔细地模仿的真实环境中进行测试。在许多情况下,简单地测量电偶对中的每一方的电位是足以预测电偶腐蚀的行为的。在某一特定环境中所得到的金属的电位序是十分有用的。然而,常常需要有更精确的数据。测定电偶电流可以提供出更多的和电偶腐蚀有关的有用数据。最近,带有零电阻安培计的新设备可以连续进行真实短路条件期间的电偶电流的测定。然而,这个电流未必等于腐蚀电流,因为它是阳极反应和阴极反应的电流的代数和。因此,在阴极电流有影响的地方,所测得的电偶电流明显地比真实的腐蚀电流小。利用极化测量连同电偶对的混合电位,可以提供与被偶接金属的性能有关的正确的数据。这个方法已成功地用于三元偶合以及预测电偶局部腐蚀。
In order to successfully use electrochemical techniques to predict galvanic corrosion, it must be tested in a carefully simulated real environment. In many cases, simply measuring the potential of each of the couple of couples is sufficient to predict galvanic corrosion. The potential order of the metals obtained in a given environment is very useful. However, it is often necessary to have more accurate data. Measuring the galvanic current can provide more useful data on galvanic corrosion. Recently, a new device with a zero-resistance amperemeter can continuously measure the galvanic current during a real short-circuit condition. However, this current is not necessarily equal to the corrosion current because it is the algebraic sum of the currents of the anode and cathode reactions. Therefore, where the cathode current is affected, the measured galvanic current is significantly less than the true corrosion current. The use of polarization measurements along with the potential of the galvanic couple can provide the correct data regarding the properties of the metal being coupled. This method has been successfully used for ternary coupling as well as for predicting galvanic localized corrosion.