Effect of phosphorous surface segregation on iron-zinc reaction kinetics during hot-dip galvanizing
Effect of phosphorous surface segregation on iron-zinc reaction kinetics during hot-dip galvanizing
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DOI：
10.1007/s11661-997-0026-5
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发表时间：
1997-12
期刊：
影响因子：
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通讯作者：
C. E. Jordan;R. Zuhr;A. Marder
中科院分区：
文献类型：
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作者：
C. E. Jordan;R. Zuhr;A. Marder
在大晶粒（10 ~ 20 mm）低碳钢板的一个表面上进行磷离子注入，以研究镀锌过程中表面偏析对Fe-Zn相形成的影响。在该研究中使用450 °C下的无Al和0.20 wt % Al-Zn浴。结果发现，P表面偏析不影响Fe-Zn相生长的动力学的总合金层或个别Fe-Zn γ，δ，和zeta相合金层中的0.00重量%的铝-锌浴。在0. 20 wt % Al-Zn镀液中，Fe_2Al_5抑制层的形成具有动力学，在P离子注入和非P离子注入表面上均呈线性生长。Fe-Zn相生长只发生在两个表面上的反应时间延长后，并被发现直接对应于基板晶界位点的位置。结果表明，P的表面偏聚不影响Fe-Zn相的生长和Fe 2Al 5抑制层的形成。结果表明，在0. 20 wt % Al-Zn浴中，基体晶界是控制Fe-Zn合金相生长动力学的主要钢基体结构特征。
Phosphorous was ion implanted on one surface of a large grain (10 to 20 mm) low-carbon steel sheet in order to study the effect of surface segregation on the formation of Fe-Zn phases during galvanizing. Both an Al-free and a 0.20 wt pct Al-Zn bath at 450 °C were used in this investigation. It was found that P surface segregation did not affect the kinetics of Fe-Zn phase growth for the total alloy layer or the individual Fe-Zn gamma, delta, and zeta phase alloy layers in the 0.00 wt pct Al-Zn baths. In the 0.20 wt pct Al-Zn bath, the Fe2Al5inhibition layer formed with kinetics, showing linear growth on both the P-ion implanted and non-P-ion implanted surfaces. Fe-Zn phase growth only occurred after extended reaction times on both surfaces and was found to directly correspond to the location of substrate grain boundary sites. These results indicate that P surface segregation does not affect the growth of Fe-Zn phases or the Fe2Al5inhibition layer. It was shown that in the 0.20 wt pct Al-Zn bath, substrate grain boundaries are the dominant steel substrate structural feature that controls the kinetics of Fe-Zn alloy phase growth.