Application of Magnesium Alloy Electroplating Zinc Process_PTJ Blog

CNC Machining Services china

Application of Magnesium Alloy Electroplating Zinc Process


Electroplating zinc on magnesium alloy can greatly improve the corrosion resistance of magnesium alloy surface, and at the same time, it has the advantages of beautiful appearance, high hardness and good wear resistance, so it has been widely used.

 The zinc coating can be used as the bottom layer of the subsequent coating, and it can also meet the requirements of protection and decoration after passivation. Compared with other plating types, galvanizing has low cost, better protection and decoration effects, and relatively stable plating solution. Domestic researchers have done a lot of research work in this area.

The pros and cons of different solution systems based on the zinc dipping layer are compared. When sulfate zinc plating, due to the strong acidity of the plating solution, it is easy to corrode the magnesium alloy substrate.

Zincate zinc plating can obtain a coating with good compactness and good adhesion under the conditions of current density of 3.0-4.0A/dm2 and time of 20min. Pyrophosphate zinc electroplating can obtain a coating with good adhesion under the conditions of a current density of 2.0-3.0A/dm2 and a time of 10 minutes. Adding additives such as phytic acid and vanillin can help reduce the porosity of the pyrophosphate zinc coating. Zhou Wanqiu et al. used a two-step electrodeposition method to deposit a metal zinc coating on AM60 magnesium alloy as a transition layer between the magnesium alloy substrate and the electroless nickel layer. The presence of the zinc intermediate layer is beneficial to reduce the galvanic corrosion between the electroless nickel plating layer and the magnesium alloy substrate. Yin Jianjun and others pretreated the AZ91D magnesium alloy through appropriate etching and activation processes, and then used alkaline zinc plating to obtain a uniform, dense, beautiful appearance, and a strong bond with the substrate.

Application of Magnesium Alloy Electroplating Zinc Process

The zinc immersion process is used as the pretreatment process for electroplating, and the resulting zinc immersion layer is uniform and dense, which can well protect the substrate from corrosion by the plating solution during the electroplating process, and at the same time serve as an intermediate layer to provide good adhesion to the electroplating layer.

Through the above research, it is concluded that the zinc coating obtained by the magnesium alloy alkaline zincate zinc plating process is bright and has high corrosion resistance. When the thickness of the alkaline zincate zinc coating exceeds 10μm, it will show uniform five-color after passivation. The salt spray test exceeds 96h. The pyrophosphate galvanizing process has good leveling ability and fine crystallization of the coating. The pyrophosphate zinc coating is used as the bottom layer, and the alkaline zincate is used to thicken the zinc coating, which can effectively improve the gloss and corrosion resistance of the zinc coating and reduce the cost at the same time.

Link to this article: Application of Magnesium Alloy Electroplating Zinc Process

Reprint Statement: If there are no special instructions, all articles on this site are original. Please indicate the source for reprinting:,thanks!

cnc machining shopSheet metal, beryllium, carbon steel, magnesium, 3D printing, precision CNC machining services for heavy equipment, construction, agriculture and hydraulic industries. Suitable for plastics and rare alloys machining. It can turn parts up to 15.7 inches in diameter. Processes include swiss machining,broaching, turning, milling, boring and threading. It also provides metal polishing, painting, surface grinding and shaft straightening services. The production range(include aluminum die casting and zinc die casting) is up to 50,000 pieces. Suitable for screw, coupling, bearing, pump, gearbox housing, drum dryer and rotary feed valve applications.PTJ will strategize with you to provide the most cost-effective services to help you reach your target,Welcome to Contact us ( ) directly for your new project.

Reply Within 24 Hours

Hotline:+86-769-88033280 E-mail:

Please place file(s) for transfer in the same folder and ZIP or RAR before attaching. Larger attachments can take a few minutes to transfer depending on your local internet speed :) For attachments over 20MB, click  WeTransfer and send to

Once all fields are filled in you will be able to send your message/file :)