Electroless Nickel Plating on ME20M Magnesium Alloys with an Environmentally-Friendly Pretreatment

2013 ◽  
Vol 750-752 ◽  
pp. 2063-2069 ◽  
Author(s):  
Cui Tian Guo ◽  
Shi Gang Xin ◽  
Qing Huang
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloys ◽  
Adhesion Strength ◽  
Environmentally Friendly ◽  
Electroless Nickel ◽  
Electrochemical Measurement ◽  
Thermal Shock Test ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Pickling Process

Coating of ME20M magnesium alloys was first carried out using electroless nickel plating technique with an environmentally-friendly pretreatment. The morphology and specific weight loss of the pickling process were investigated. The Ni-P coating was characterized by its structure, morphology, chemical composition, adhesion strength and corrosion resistance. The SEM image shows that the pyrophosphate pickling process can produce a rough surface and the thermal shock test indicates excellent adhesion strength between magnesium alloys and Ni-P coating. The damp heat test and electrochemical measurement prove the Ni-P coating significantly increase the corrosion resistance of ME20M magnesium alloys.

Electroless Nickel Plating on Copper Foil

2014 ◽  
Vol 926-930 ◽  
pp. 103-107
Author(s):  
Zuo Qin Tang ◽  
Su Rong Hu ◽  
Yin Chun Chao
Keyword(s):  
Corrosion Resistance ◽  
Potentiodynamic Polarization ◽  
Copper Foil ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Nacl Solution ◽  
Tribological Behaviour ◽  
Microhardness Tester

A pre-cleaning and an electroless nickel plating (EN-HP) were applied to copper foil to improve its tribological behaviour and corrosion resistance. The coating porosity was measured by the corrodkote, tribological behaviour was measured with microhardness tester and a CSM ball-on-disk tribometer, corrosion resistance was measured by potentiodynamic polarization in 3.5 wt.% NaCl solution. Matte nickel plating (mNi) and moderate compact Ni–P coating (EN-MP) were made as comparisons to EN-HP in those tests. By deposition of EN-HP, both coating porosity and tribological behaviour are greatly improved compared to mNi, and the corrosion resistance is distinctly ameliorated to the comparisons. Above research demonstrates that the copper foil with EN-HP coating is good underlay in assemblage of machine.

Study on the process of electroless nickel plating on magnesium alloys

2005 ◽  
Vol 83 (2) ◽  
pp. 91-94 ◽  
Author(s):  
Y. Wu ◽  
Y. Xiang ◽  
W. Hu ◽  
C. Zhao ◽  
W. Ding
Keyword(s):  
Magnesium Alloys ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating

Synergistic Fluoropolymer Coating on Magnesium Alloys

2005 ◽  
Vol 488-489 ◽  
pp. 673-676 ◽  
Author(s):  
Hong Qing Zou ◽  
Ji Cheng Lu ◽  
Jin Zhang ◽  
Hou Chang Wu ◽  
Min Fang
Keyword(s):  
Magnesium Alloys ◽  
Coefficient Of Friction ◽  
Salt Spray ◽  
Electroless Nickel ◽  
Neutral Salt ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Long Duration ◽  
Fluoropolymer Coating ◽  
Dynamic Coefficient Of Friction

The synergistic fluoropolymer self-lubrication coatings on magnesium alloys were studied. Magnesium alloy was firstly treated by electroless nickel plating. Then micropores of electroless nickel plating layer was enlarged. Then the fluoropolymer particles were infused into micropores, precise vacuum heat treatment ensured thorough infusion with fluoropolymer, finally the synergistic coating was formed. The hardness of the coating reached 600HV, the dynamic coefficient of friction of the coating was less than 0.15, and the low coefficient of friction could be kept during a long duration wear to realize the permanent dry lubrication. The corrosion resistance was also excellent to endure 5% neutral salt spray test for 500 hours. Also the structure and composition of the coating were observed and studied.

Initial Deposition Mechanism of Electroless Nickel Plating on Magnesium Alloys

2001 ◽  
Vol 79 (1) ◽  
pp. 30-32 ◽  
Author(s):  
Yanghui Xiang ◽  
Wenbin Hu ◽  
Xinkuan Liu ◽  
Changzheng Zhao ◽  
Wenjiang Ding
Keyword(s):  
Magnesium Alloys ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Deposition Mechanism ◽  
Initial Deposition

Effects of multiple ligand coordinations on electroless nickel plating on magnesium alloys

2008 ◽  
Vol 24 (4) ◽  
pp. 295-300 ◽  
Author(s):  
X. L. Gao ◽  
G. Yu ◽  
Y. J. Ouyang ◽  
J. L. Chen ◽  
X. P. Lei ◽  
...  
Keyword(s):  
Magnesium Alloys ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Multiple Ligand

A new concept for electroless nickel plating: aluminium as reducing agent

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30695-30698 ◽  
Author(s):  
Xingkai Zhang ◽  
Junyan Zhang
Keyword(s):  
Corrosion Resistance ◽  
Electroless Plating ◽  
Electroless Nickel ◽  
Reducing Agents ◽  
Reducing Agent ◽  
Electroless Nickel Plating ◽  
Nickel Plating ◽  
Nickel Coatings ◽  
Excellent Corrosion Resistance

Aluminum was used as a reducing agent for preparing nickel coatings with excellent corrosion resistance from electroless plating baths containing no reducing agents.

Effects of pretreatments of magnesium alloys on direct electroless nickel plating

2012 ◽  
Vol 90 (4) ◽  
pp. 209-214 ◽  
Author(s):  
T N Tran ◽  
G Yu ◽  
B N Hu ◽  
Z H Xie ◽  
R Tang ◽  
...  
Keyword(s):  
Magnesium Alloys ◽  
Electroless Nickel ◽  
Electroless Nickel Plating ◽  
Nickel Plating
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