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Induced-Pitting Behaviors of MnS Inclusions in Steel

机译：钢中MnS夹杂物的诱导点蚀行为

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This paper investigated the effects of MnS inclusions on inducing pitting in steel. Three different cooling methods were used to control the morphology, size, and distribution of MnS inclusions. AC (alternating current) impedance spectroscopy experiments and potentiodynamic polarization experiments were carried out for different sizes of MnS inclusions. The corrosion immersion experiment was conducted to study the pitting corrosion process in different morphologies of MnS inclusions. The experiment results showed that pitting corrosion occurred around MnS inclusions and pitting was induced along the junction of MnS inclusions and their surrounding steel matrix. Also, the sensitivity of inducing-pitting of MnS inclusions was changed with the change of the average size of MnS in steel and it had a critical size of MnS. The deeper the MnS inclusions were buried in steel matrix, the more difficult it was for it to dissolve and fall off. Herein, it would cause greater damage.
机译：本文研究了MnS夹杂物对钢中点蚀的影响。三种不同的冷却方法用于控制MnS夹杂物的形态，尺寸和分布。针对不同尺寸的MnS夹杂物进行了交流（交流）阻抗谱实验和恒电位极化实验。进行腐蚀浸没实验，研究了不同形态的MnS夹杂物的点蚀过程。实验结果表明，在MnS夹杂物周围发生点蚀，并在MnS夹杂物及其周围的钢基体的交界处引起点蚀。另外，MnS夹杂物的点蚀敏感性随钢中MnS平均尺寸的变化而变化，并且具有临界尺寸的MnS。 MnS夹杂物在钢基质中的埋深越深，其溶解和脱落的难度就越大。在此会造成更大的损害。

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