A 316LN stainless steel with a gradient-nanostructured surface layer was fabricated by rotationally accelerated shot peening (RASP). The thickness of this gradient layer was about 210 μm. Layer-by-layer electrochemical experiments confirmed that the layer of the gradient steel with the best corrosion resistance is found at a distance of 110 μm from the surface. The nanostructures and pits generated by RASP produced two opposing effects on its corrosion resistance: the nanocrystals and nano-twins facilitate the formation of a thick, compact passive film which resists corrosion, whereas the pits tend to destroy it. The passive films formed on the pits and on the smoothly nanostructured areas were 5.5 nm and 13.9 nm thick, respectively.

通过旋转加速喷丸硬化（RASP）来制造具有梯度纳米结构表面层的316LN不锈钢。该梯度层的厚度为约210μm。逐层电化学实验证实，在距表面110μm的距离处发现了具有最佳耐腐蚀性的梯度钢层。RASP产生的纳米结构和凹坑对其耐腐蚀性产生了两个相反的影响：纳米晶体和纳米孪晶有助于形成厚而致密的抗腐蚀钝化膜，而凹坑往往会破坏它。在凹坑和光滑的纳米结构区域上形成的钝化膜分别为5.5 nm和13.9 nm厚。