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图5 表面沉积不同类型ZrN涂层的AISI 420 MSS在酸性Cl-腐蚀环境下腐蚀后的表面SEM图像[71]
Fig.5 Surface SEM images of AISI 420 MSS with different types of ZrN coatings after corrosion in an acidic Cl- corrosive environment: (a) uncoated, (b) single layer, (c) multi layer, (d) gradient layer[71]