The Influences of Additives on the Corrosion Resistant Properties of Electroless Plating Ni-Co-P Alloy on the AZ91D Magnesium Alloy

Zu Xiao Yu; Ya Li Sun; Xin Huang

doi:10.4028/www.scientific.net/AMR.1004-1005.733

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 1004-1005The Influences of Additives on the Corrosion...

The Influences of Additives on the Corrosion Resistant Properties of Electroless Plating Ni-Co-P Alloy on the AZ91D Magnesium Alloy

Abstract:

To improve the anti-corrosion properties of the AZ91D magnesium alloy, the electroless plating Ni-Co-P on the AZ91D magnesium alloy is necessary. The influences of additives (ammonium fluoride (NH₄F) and hexamethylenetetramine (HMTA)) on deposition rate, corrosion rate, acid resistance, corrosion current, corrosion potential and webster hardness of electroless plating Ni-Co-P alloy coating, were investigated using electrochemical methods, etc. The results show that the deposition rate and corrosion resistance properties of electroless plating Ni-Co-P are obviously improved when the additives, including NH₄F (2%) and hexamethylenetetramine (HMTA, 1%), are added into plating solution, respectively. In addition, the global particles in the Ni-Co-P coating become smaller with the addition of NH₄F by comparison with no additives and coatings are dense, uniform and defect-free.

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Periodical:

Advanced Materials Research (Volumes 1004-1005)

Pages:

733-736

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1004-1005.733

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Online since:

August 2014

Authors:

Zu Xiao Yu*, Ya Li Sun, Xin Huang

Keywords:

Additive, AZ91D Magnesium Alloy, Corrosion Resistance, Electroless Plating Ni-Co-P

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