Preparation and characterization of inorganic and organic coatings on AZ91D magnesium alloy with electroless plating pretreatment

2011 ◽  
Vol 62 (9) ◽  
pp. 841-847 ◽  
Author(s):  
S. Y. Zhang ◽  
Q. Li ◽  
X. K. Yang ◽  
H. X. Zhang ◽  
S. Y. Wang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Electroless Plating ◽  
Organic Coatings ◽  
Az91d Magnesium Alloy ◽  
Inorganic And Organic

Preparation and characterization of colored Ti/Zr conversion coating on AZ91D magnesium alloy

2015 ◽  
Vol 276 ◽  
pp. 239-247 ◽  
Author(s):  
Aihua Yi ◽  
Jun Du ◽  
Jian Wang ◽  
Songling Mu ◽  
Guoge Zhang ◽  
...  
Keyword(s):  
Magnesium Alloy ◽  
Conversion Coating ◽  
Az91d Magnesium Alloy

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

2014 ◽  
Vol 1004-1005 ◽  
pp. 733-736
Author(s):  
Zu Xiao Yu ◽  
Ya Li Sun ◽  
Xin Huang
Keyword(s):  
Magnesium Alloy ◽  
Deposition Rate ◽  
Electroless Plating ◽  
Acid Resistance ◽  
Ammonium Fluoride ◽  
Alloy Coating ◽  
Corrosion Current ◽  
Corrosion Properties ◽  
Corrosion Resistant ◽  
Az91d Magnesium Alloy

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.

Characterization of Oxide Film by Vanadium Based Anodic Oxidation Coating

2014 ◽  
Vol 970 ◽  
pp. 55-59
Author(s):  
Toha Nor Fadzilah ◽  
Siti Norbahiyah ◽  
Mohd Zain Mohamad Zamzuri
Keyword(s):  
Magnesium Alloy ◽  
Oxide Film ◽  
Cross Section ◽  
Corrosion Test ◽  
Energy Dispersive Spectrometry ◽  
Optical Microscope ◽  
Az91d Magnesium Alloy ◽  
Atomic Force ◽  
Polarization Technique

An oxide film was prepared on AZ91D magnesium alloy by anodizing in solution containing sodium metavanadate (NaVO3). The corrosion resistance of the AZ91D magnesium alloy was investigated at fixed current density 10 mA/cm2for 5 min with different concentration of solution in the range of 0 1.0 g/l. The surface morphology, cross section morphology, phase structure, and surface roughness of oxide film were studied by optical microscope, scanning electron microscope (SEM) and energy dispersive spectrometry (EDS), atomic force microscope (AFM) and potentiodynamic polarization technique and corrosion test, respectively.

Organic coatings silane-based for AZ91D magnesium alloy

2010 ◽  
Vol 519 (4) ◽  
pp. 1361-1366 ◽  
Author(s):  
Junying Hu ◽  
Qing Li ◽  
Xiankang Zhong ◽  
Longqin Li ◽  
Liang Zhang
Keyword(s):  
Magnesium Alloy ◽  
Organic Coatings ◽  
Az91d Magnesium Alloy
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