The variation of electrochemical corrosion behavior with pore depth in porous Ti6Al4V alloys produced by electron beam melting (EBM) was studied in situ by a unique simulation model in acidic solution containing fluoride (PBS-H-F). The results suggested that steady-state pitting occurred at shallow pore depth position, while the sample at deep pore depth position exhibited superior corrosion resistance. The degree of corrosion on the surface was decreased with the increase in pore depth, including susceptibility to pitting, a behavior attributed to the concentration gradient of fluoride ions inside the pores.

中文翻译：

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电子束熔化制备的多孔结构Ti6Al4V合金在氟化物环境中的电化学腐蚀行为的原位监测

与在通过电子束熔炼（EBM）制备的多孔的Ti6Al4V合金孔深度电化学腐蚀行为的变化进行了研究原位通过含氟化物的唯一仿真模型在酸性溶液中（PBS-HF）。结果表明稳态点蚀发生在浅孔深度位置，而样品在深孔深度位置表现出优异的耐腐蚀性。随着孔深度的增加，包括对点蚀的敏感性，表面上的腐蚀程度降低，这是由于孔内氟离子的浓度梯度引起的。