The microstructures of Fe_balance-18Cr-12Ni-1.5Mn-0.07C (in wt%) alloys containing 0.2–1.76 wt% B were controlled through hot rolling of 60% and 96%. It was found that refining the microstructure through additional hot rolling helped to form a stable passive film and accelerate passivation. Passive film formed on the 96% hot-rolled BSS exhibited higher electrical resistant than that of the 60% hot-rolled BSS, and Cr-enriched passive film was formed on the 96% hot-rolled BSS. As a result, refining the microstructure increased E_pit and E_rp, and reduced metastable pit events and passive current density.

中文翻译：

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通过热轧提高 304 型硼化不锈钢的抗局部腐蚀能力

Fe_余量-18Cr-12Ni-1.5Mn-0.07C（以wt%计）合金的微观结构含有0.2-1.76wt% B，通过60%和96%的热轧进行控制。发现通过额外的热轧来细化微观结构有助于形成稳定的钝化膜并加速钝化。在96%热轧BSS上形成的钝化膜比60%热轧BSS具有更高的电阻，在96%热轧BSS上形成富Cr钝化膜。结果，细化微观结构增加了E _pit和E _rp，并减少了亚稳态凹坑事件和被动电流密度。