We study the kinetics of formation of a diffusion layer after chromium plating with a nickel–cobalt–phosphorus coating. It is shown that the presence of phosphorus in the chemical coating affects the formation of an outer composite zone formed by columnar chromium carbides and the matrix of solid solution of chromium in α-iron. At the same time, in the early stages, atomic chromium displaces nickel and cobalt into the bulk of the material but does not affect the distribution of phosphorus. We also explain the appearance of directed zones with higher degrees of damage in the process of diffusion. Atomic chromium is intensely transported through these zones, which leads to the formation of a regular structure of the outer composite zone.

中文翻译：

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镍钴磷镀层钢的扩散镀铬动力学

我们研究了镍钴磷镀铬后扩散层形成的动力学。结果表明，化学镀层中磷的存在影响了柱状碳化铬与铬在α-铁中固溶体基体形成的外复合区的形成。同时，在早期阶段，原子铬将镍和钴置换到材料的主体中，但不影响磷的分布。我们还解释了在扩散过程中具有更高损伤程度的定向区域的出现。原子铬通过这些区域强烈传输，导致形成外部复合区域的规则结构。