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四、快速磷酸阳极化过程及其对胶接耐久性的影响图11为我们测得的短时间范围内的T-A曲线。这一结果与[4]中的基本相同。从曲线可见磷酸阳极化的过程大体如下:开始通电即以额定电压加到两极间,约3秒钟内电流由0达到最大值,这表明原有氧化膜在电解液中迅速溶解。又经约10秒,电流由最大值降到一最低值,说明新的氧化膜阻挡层已经形成并加厚。以后再经约10秒,电流稍有回升并达到一较为稳定的值,一直到20分钟以后基本保持此值不
Fourth, the rapid phosphoric acid anodization process and the durability of the bonding Figure 11 shows our T-A curve within a short time range. This result is basically the same as in [4]. From the graph we can see that the process of phosphoric acid anodization is generally as follows: When the power is applied, the rated voltage is applied between the two electrodes, and the current reaches the maximum value from 0 within about 3 seconds, indicating that the original oxide film dissolves rapidly in the electrolyte. After about 10 seconds, the current dropped from the maximum value to a minimum value, indicating that a new oxide film barrier layer has been formed and thickened. After about 10 seconds later, the current slightly rose and reached a more stable value, until 20 minutes after the basic maintenance of this value is not