期刊
CORROSION SCIENCE
卷 55, 期 -, 页码 194-200出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.corsci.2011.10.028
关键词
Magnesium; Metal coating; Polarization; SEM; Kinetic parameters
资金
- Departamento Administrativo de Ciencia, Tecnologia e Innovacion-COLCIENCIAS
- University of Antioquia
- University of Manchester [111545221131]
- Engineering and Physical Sciences Research Council (UK) [LATEST2]
- EPSRC [EP/H020047/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H020047/1] Funding Source: researchfish
An alkaline electroless treatment that forms a low-phosphorus Ni-P coating on magnesium is described. The treatment is shown to provide a suitable base for deposition of a high-phosphorus, electroless nickel coating using a slightly acidic bath. The composition of the alkaline bath was selected to limit the corrosion of the substrate during coating and to avoid the utilization of chromate ions or hydrofluoric acid. An optimal amount of NH4HF2 is identified that provides a relatively thin Ni-P coating, with the subsequently-deposited, high-phosphorus coating enhancing the corrosion resistance of the magnesium in sodium chloride solution. (C) 2011 Elsevier Ltd. All rights reserved.
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