Electron Beam Melting is an Additive Manufacturing technology that allows the production of items using metal powder as raw material. The main advantage of Additive Manufacturing (AM) is realizing complex shape components; however one of the main defects is the poor quality of the surface. To this aim, different post processing treatments have been proposed such as machining, surface laser melting, sand blasting, etc.

The main drawback of these technologies is the necessity to use tools that makes complex shape item difficult to handle.

This inconvenient does not occur in chemical machining, since a chemical solution can operate in an undifferentiated way on the whole surface of a component.

In this work some components in Ti6Al4V obtained through AM have been treated in acidic solutions containing HF and HNO₃ with different HF/HNO₃ molar ratio. All the solutions employed have proven to be effective in smoothing the metal surface, but the best results have been obtained with solutions with high content of HNO₃. It should be noted that the process causes changes in the surface composition with respect to the received samples with an impoverishment of Al. This effect is partially mitigated by the passivating action of HNO₃.

电子束熔化是一种增材制造技术，允许使用金属粉末作为原材料来生产物品。增材制造（AM）的主要优点是实现复杂的形状组件；然而，主要缺陷之一是表面质量差。为此，已提出了不同的后处理方法，例如机械加工，表面激光熔化，喷砂等。

这些技术的主要缺点是必须使用使复杂形状的物品难以处理的工具。

在化学机械加工中不会出现这种不便，因为化学溶液可以在部件的整个表面上以无差别的方式运行。

在这项工作中，通过AM获得的Ti6Al4V中的某些成分已在含有HF和HNO ₃摩尔比不同的HF和HNO _3的酸性溶液中进行了处理。已证明所有采用的解决方案都可以有效地平滑金属表面，但是使用高含量HNO _3的解决方案可获得最佳结果。应当注意的是，该过程导致相对于所接收的具有贫化的Al的样品的表面组成发生变化。HNO ₃的钝化作用可部分缓解这种影响。