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首页> 外文期刊>Surface & Coatings Technology >Electroless Ni-P layer with a chromium-free pretreatment on AZ91D magnesium alloy
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Electroless Ni-P layer with a chromium-free pretreatment on AZ91D magnesium alloy

机译：在AZ91D镁合金上进行无铬预处理的化学镀Ni-P层

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摘要

A phosphate-manganese conversion film was proposed as the pretreatment layer between Ni-P coating and AZ91D magnesium alloy substrate, to replace the traditional chromium oxide plus HF pretreatment. The subsequent Ni-P deposited on the layer was also characterized by its structure, morphology, microhardness and corrosion-resistance. The pretreatment layer on the substrate not only reduces the corrosion of magnesium during Ni-P plating process, but also reduces the potential difference between the matrix and the second phase. Thus, a Ni-P coating with fine and dense structure was obtained on the AZ91D magnesium alloy, which shows better corrosion resistance than the Ni-P with chromium oxide plus HF as pretreatment. (c) 2006 Elsevier B.V. All rights reserved.
机译：提出了磷酸盐-锰转化膜作为Ni-P涂层与AZ91D镁合金基体之间的预处理层，以代替传统的氧化铬加HF预处理。随后沉积在该层上的Ni-P的特征还在于其结构，形态，显微硬度和耐蚀性。基板上的预处理层不仅可以减少Ni-P电镀过程中镁的腐蚀，而且可以减少基体与第二相之间的电势差。因此，在AZ91D镁合金上获得了具有细密致密结构的Ni-P涂层，与采用氧化铬和HF进行预处理的Ni-P相比，它具有更好的耐腐蚀性。 （c）2006 Elsevier B.V.保留所有权利。

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