The Influence of Complexing Agent to the Function of Electroless Plating of P-Ni Alloy on Magnesium Alloy

2010 ◽  
Vol 146-147 ◽  
pp. 327-330
Author(s):  
Yan Fang Chen ◽  
Xue Tao Yu ◽  
Yan Jie Qi ◽  
Ming Yue Ma ◽  
Qing Hua Chang
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Electroless Plating ◽  
Sodium Citrate ◽  
Complexing Agent ◽  
Az31b Magnesium Alloy ◽  
Ni Alloy ◽  
The Matrix ◽  
Buffering Agent ◽  
Scanning Electron

To improve the corrosion resistance and wear resistance of AZ31B magnesium alloy, in this dissertation, we use the method making AZ31B magnesium alloy as the matrix to make coating on the way of electroless plating nickel-phosphor directly. In this study, we make experiments on the influence of concentration of complexing agent in electroplating to electroless plating on the surface of magnesium alloy. We utilize the scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and the detection of corrosion resistance etc. To analyze the morphology, composition and corrosion resistance of coating. We come to a conclusion that the reaction is at the soonest when we adopt sodium citrate as buffering agent and its density is10ml/L., meanwhile, the coating particle is tiny and is well-knit with matrix. What’s more, phosphorus contents are maximum and the corrosion resistance is greatest.

Influence of electroless plating on the deterioration of the corrosion resistance of MAO coated AZ31B magnesium alloy

2016 ◽  
Vol 68 ◽  
pp. 496-505 ◽  
Author(s):  
Shun-Yi Jian ◽  
Jeou-Long Lee ◽  
Hung-Bin Lee ◽  
Hung-Hua Sheu ◽  
Chang-Ying Ou ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Electroless Plating ◽  
Az31b Magnesium Alloy

Effect of Bath Compositions on the Properties of Electroless Ni-Cu-P Alloys on Aluminum

2011 ◽  
Vol 117-119 ◽  
pp. 1276-1279 ◽  
Author(s):  
Xi Ran Wang ◽  
Xin Gang Hu ◽  
Wei Yuan Li
Keyword(s):  
Corrosion Resistance ◽  
Electroless Plating ◽  
Sodium Citrate ◽  
Nickel Sulfate ◽  
Sodium Hypophosphite ◽  
Micro Hardness ◽  
X Ray ◽  
Plating Method ◽  
The Matrix ◽  
Electroless Ni

In this work, the electroless plating Ni-Cu-P on aluminium is obtained successfully by direct Ni-Cu-P plating method. The effect of bath compositions on the electroless plating rate and the properties of the electroless Ni-Cu-P deposits was studied by orthogonal test. The corrosion resistance, hardness, surface morphology and components of the coating were studied by using electrochemical workstation, digital micro-hardness SEM and EDS. The optimum bath formula obtained is 0.6g/L copper sulfate, 30g/L nickel sulfate, 35g/L sodium citrate, 25 g/L sodium hypophosphite, 20g/L acetic anhydride and right amount of self-made additive. The deposition rate, hardness and corrosion resistance are all good. The adhesion between the deposits and the matrix is better. The deposits is smooth and uniformity, smooth by SEM. The deposit contains Ni 78.90%, Cu 8.65%, P 12.46% by the analyses of energy disperse X-ray.

Influence of the complexing agent sodium citrate on the chemical composition, surface morphology and corrosion resistance of Ni–Fe electrodeposits

2019 ◽  
Vol 97 (5) ◽  
pp. 230-236
Author(s):  
G. P. da Silva ◽  
R. N. de Lima ◽  
F. J. N. Santos ◽  
F. P. S. de Menezes ◽  
L. P. L. Morais ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Chemical Composition ◽  
Surface Morphology ◽  
Sodium Citrate ◽  
Complexing Agent

scholarly journals Effect of Additives on Electrodeposition of Zinc-Nickel Alloy On Mild Steel

2019 ◽  
Vol 31 (4) ◽  
pp. 891-895
Author(s):  
Dinesh Kumar Chelike ◽  
K. Juliet Gnana Sundari
Keyword(s):  
Corrosion Resistance ◽  
Mild Steel ◽  
Electrochemical Impedance ◽  
Corrosion Behaviour ◽  
Alloy Coating ◽  
Complexing Agent ◽  
Tafel Polarization ◽  
Good Corrosion Resistance ◽  
Ni Alloy ◽  
Strong Candidate

Considering the good corrosion resistance of Zn-Ni alloy, it is selected in the present study to be the protective coating on mild steel and it is considered as a strong candidate for the replacement of environmentally hazardous cadmium. Zn-Ni alloy coating is applied by electrodeposition at optimum temperature, current density and time. The bath solution used is consisting of EDTA as complexing agent. The electrodeposition is also carried out with tartaric acid and benzaldehyde additives to have good corrosion resistance and brightness. The electrodeposits obtained with and without additives are examined for nature and alloy composition. The corrosion behaviour of the electrodeposits is studied by Tafel polarization and electrochemical impedance spectroscopy.

scholarly journals Effect of alcohol addition on the structure and corrosion resistance of plasma electrolytic oxidation films formed on AZ31B magnesium alloy

RSC Advances ◽  
2020 ◽  
Vol 10 (15) ◽  
pp. 9026-9036
Author(s):  
Hidetaka Asoh ◽  
Kento Asakura ◽  
Hideki Hashimoto
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Plasma Electrolytic Oxidation ◽  
Az31b Magnesium Alloy ◽  
Electrolytic Oxidation ◽  
Plasma Electrolytic

Alcohol used as an additive could act not only as a leveler for the formation of compact film but also as an enhancer for film qualities, such as corrosion resistance and withstand voltage.

The Influence of Plating Temperature on the Properties of Electroless Ni-Cu-P Alloys on Aluminum

2011 ◽  
Vol 189-193 ◽  
pp. 1096-1099
Author(s):  
Xi Ran Wang ◽  
Hui Lu ◽  
Ying Wei Zhang ◽  
Xin Gang Hu ◽  
Jing Wu
Keyword(s):  
Corrosion Resistance ◽  
Surface Morphology ◽  
Deposition Rate ◽  
Electroless Plating ◽  
Micro Hardness ◽  
Optimal Temperature ◽  
X Ray ◽  
The Matrix ◽  
Electroless Ni

In this work, the effect of plating temperature on the electroless plating rate and the properties of the electroless Ni-Cu-P deposits was studied. The corrosion resistance, hardness, surface morphology and components of the coating were studied by using electrochemical workstation, digital micro-hardness SEM and EDS. The results show that the optimum plating temperature is 75°C. The deposition rate, hardness and corrosion resistance are all good when the optimal temperature is 75°C. The adhesion between the deposits and the matrix is better. The deposits is smooth and uniformity, smooth by SEM. The deposit contains Ni 77.80%, Cu 7.68%, P 14.52% by the analyses of energy disperse X-ray.

Fast Electroless Ni-P Coating on AM60 Magnesium Alloy at Low Bath Temperature

2011 ◽  
Vol 418-420 ◽  
pp. 756-759 ◽  
Author(s):  
Guo Bing Mao
Keyword(s):  
Growth Rate ◽  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Electroless Plating ◽  
Corrosion Test ◽  
Bath Temperature ◽  
Test Results ◽  
Electroless Ni

The Ni-P coatings were deposited on AM60 magnesium alloy by electroless plating process without or with accelerators. Without accelerators, the deposition rate is slow and required high bath temperature to obtain compact coating. There have many defects on the surface of the Ni-P coatings which deposited at high bath temperature. The composite accelerators were introduced into the bath for improving the growth rate and the quality of the Ni-P coating. Uniform, with no pores or cracks, “cauliflower-like” structure and complete Ni-P coatings were deposited only taken 20 min with additives at low bath temperature. The XRD result indicates that the structure of the Ni-P coating is amorphous nickel. The corrosion test results indicated that the corrosion resistance of this coated AM60 magnesium alloys increases distinctly as compared to bare alloys.

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