钝化表面的检测通常是通过查看金属表面的游离铁的踪迹来完成的。

Testing for a passive surface is usually accomplished by looking for traces of free iron on the metal surface.

youdao

采用国产冷轧精密无缝钢管，利用镀锌军绿色钝化表面处理技术，在斯太尔汽车用制动管上进行应用试验。

The domestic cold-rolled precise seamless steel tubes treated for their surfaces with the galvanizing inactivation technology are tested and used for automotive brake tubes in Styre trucks.

youdao

钝化表面的直接检测可通过X射线光电子光谱法(XPS)检测来实现，该方法通常用于金属表面发现的元素的氧化状态。

Direct testing for a passive surface can be accomplished by X-ray Photoelectron Spectroscopy (XPS) testing which is used to measure the oxidation states of elements found on the metal surface.

youdao