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发明公开
CN110408769A 飞秒激光冲击提高镁合金耐腐蚀性的装置和方法 有权

飞秒激光冲击提高镁合金耐腐蚀性的装置和方法
摘要：
本发明涉及飞秒激光冲击提高镁合金耐腐蚀性的装置和方法，包括第一反应容器，所述第一反应容器内放置有镁合金试样，所述镁合金试样浸没在所述第一反应容器内的稀磷酸溶液中，所述第一反应容器的上方设置有飞秒激光发生装置。本发明将镁合金试样固定在稀磷酸溶液中，稀磷酸与镁合金试样反应生成磷酸盐膜，覆盖在镁合金试样表面。飞秒激光冲击，镁合金试样表面形成微织构，稀磷酸与镁合金在飞秒激光形成的表面微织构处再次填充反应，提高磷酸盐膜的厚度，并降低镁合金表面粗糙度，磷酸盐膜能够提高镁合金试样的耐腐蚀性。本发明可以很大程度上降低镁合金在腐蚀环境中的腐蚀敏感性,提高其使用寿命。
摘要（英）：

The invention relates to a device and method for improving corrosion resistance of a magnesium alloy through femtosecond laser impact. The device comprises a first reaction container, a magnesium alloy sample is placed in the first reaction container, the magnesium alloy sample is immersed in a dilute phosphoric acid solution in the first reaction container, and a femtosecond laser generating device is arranged above the first reaction container. The magnesium alloy sample is fixed in the dilute phosphoric acid solution, dilute phosphoric acid reacts with the magnesium alloy sample to generatea phosphate film, and the phosphate film covers the surface of the magnesium alloy sample. By means of femtosecond laser impact, microtextures are formed on the surface of the magnesium alloy sample,dilute phosphoric acid and the magnesium alloy are filled and reacted again at the surface microtextures formed by the femtosecond laser, the thickness of the phosphate film is improved, the surfaceroughness of the magnesium alloy is reduced, and the corrosion resistance of the magnesium alloy sample can be improved by the phosphate film. The corrosion sensitivity of the magnesium alloy in the corrosion environment can be reduced to a great degree, and the service life of the magnesium alloy is prolonged.

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