Electroplated aluminum alloy machined parts
Aluminum alloy electroplating machined parts
Electroplating is divided into rack plating, barrel plating, continuous plating and brush plating, which are mainly related to the size and batch of parts to be plated. Rack plating is suitable for products of general size, such as car bumpers, bicycle handlebars, etc. Barrel plating is suitable for small parts, fasteners, washers, pins, etc. Continuous plating is suitable for mass-produced wires and strips. Brush plating is suitable for partial plating or repair.
The electroplating solution includes acidic, alkaline, and acidic and neutral solutions with chromium mixture. No matter what plating method is used, the plating tanks and hangers in contact with the products to be plated and the plating solution should have a certain degree of Versatility.
Ouzhan aluminum alloy electroplating nickel plating display:
The principle of aluminum alloy plating
Electroplating requires a low-voltage high-current power supply to the electroplating tank and an electrolytic device composed of electroplating solution, parts to be plated (cathode) and anode. The composition of the electroplating solution varies depending on the plating layer, but they all contain a main salt that provides metal ions, a complexing agent that can complex metal ions in the main salt to form a complex, a buffer used to stabilize the pH of the solution, an anode activator, and Special additives.
The electroplating process is a process in which the metal ions in the plating solution are reduced to metal atoms through the electrode reaction under the action of an external electric field, and the metal is deposited on the cathode. Therefore, this is a metal electrodeposition process that includes liquid phase mass transfer, electrochemical reaction and electrocrystallization.
In the plating tank containing the electroplating solution, the cleaned and specially pretreated parts to be plated are used as the cathode, and the anode is made of plated metal, and the two poles are respectively connected with the positive and negative electrodes of the DC power supply. The electroplating solution is composed of an aqueous solution containing metal-plated compounds, conductive salts, buffers, pH adjusters, and additives.
After being energized, the metal ions in the electroplating solution move to the cathode under the action of the potential difference to form a plating layer. The metal of the anode forms metal ions into the electroplating solution to maintain the concentration of metal ions to be plated. In some cases, such as chromium plating, an insoluble anode made of lead and lead-antimony alloy is used, which only serves to transfer electrons and conduct current.
The concentration of chromium ions in the electrolyte needs to be maintained by regularly adding chromium compounds to the plating solution. During electroplating, the quality of the anode material, the composition of the electroplating solution, temperature, current density, power-on time, stirring intensity, precipitated impurities, power waveform, etc. will affect the quality of the coating and need to be controlled in a timely manner.
In electroplating, the materal to be plated is used as the cathode, the same metal material as the plated metal is used as the anode (insoluble anodes are also used), and the electrolyte is a solution containing plated metal ions; a certain current is input between the anode and the cathode.
|Material||Aluminum alloy (material optional)|
|Surface treatment||Common chemical treatments for aluminum alloys include chromization, painting, electroplating, anodizing, and electrophoresis. Among them, mechanical treatments include wire drawing, polishing, sandblasting, and polishing.|
|Main process||⑴Filling extrusion stage; ⑵Advection extrusion stage; ⑶Turbulent extrusion stage.|
|Quality control||Strict quality control in the whole process of coordinate measuring machine from material to packaging.|
|Usage||Aerospace, shipbuilding, construction, radiator, transportation, mechanical equipment processing, medical equipment and daily necessities|
|Custom drawings||Accepts automatic CAD, JPEG, PDF, STP, IGS and most other file formats.|