The relationship between morphology of milling surface and its corrosion resistance for nickel base superalloy FGH97 have been investigated based on the milling experiment corresponding to different cutting parameters.Motif area ratio parameter is proposed in order to visually characterize the surface morphology.Motif area ratio is defined as the ratio of the surface area that can meet the threshold condition to the machined surface.The morphology of the workpiece surface can be characterized by the amplitude parameter and Motif area ratio method.The relationship model between the milling parameters and the corrosion rate of the workpiece is established by taking surface morphology,residual stress and other surface characteristics as the intermediate variables.Experimental results show that the corrosion rate of the workpiece will be smaller and smaller as surface morphology improved.The higher the residual stress on the workpiece surface,the larger the corrosion rate of the workpiece will be.
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