Throwing power is an important parameter that provides a measure of the uniformity of electroplating current, and consequently the uniformity of the electroplated metal thickness, on regions of the part that are near to the anode compared to regions that are far from it. The term "electroplating" may also be used occasionally for processes that use an electric current to achieve oxidation of anions on to a solid substrate, as in the formation of silver chloride on silver wire to make silver/silver-chloride (AgCl) electrodes.Įlectropolishing, a process that uses an electric current to remove metal cations from the surface of a metal object, is the reverse of the process of electroplating. It is also used to purify metals such as copper. It is used to deposit copper and other conductors in forming printed circuit boards, and copper interconnects in integrated circuits. It is used to build up thickness on undersized or worn-out parts, or to manufacture metal plates with complex shape, a process called electroforming. The current is provided by an external power supply.Įlectroplating is widely used in industry and decorative arts to improve the surface qualities of objects-such as resistance to abrasion and corrosion, lubricity, reflectivity, electrical conductivity, or appearance. The part to be coated acts as the cathode (negative electrode) of an electrolytic cell the electrolyte is a solution of a salt of the metal to be coated and the anode (positive electrode) is usually either a block of that metal, or of some inert conductive material. Moreover, it must be remembered that all die-cast zamak products are completely recyclable.Creation of protective or decorative metallic coating on other metal with electric current Copper electroplating machine for layering PCBsĮlectroplating, also known as electrochemical deposition or electrodeposition, is a process for producing a metal coating on a solid substrate through the reduction of cations of that metal by means of a direct electric current. Moreover, zinc alloys release no pollutants and no toxic residues into the air during the work cycle. Zamak and zinc alloys, generally, require less energy than similar materials for transformation into finished products. Cast zamak pieces are so extremely accurate that they can be used for precision casting or top quality complex casting as well as to facilitate the execution of surface finishes and galvanic treatments (chromium- and nickel-plating, painting and glazing, etc.). You can produce parts weighing just a few grams or several kilos. Unlike other die-casting alloys (such as aluminium and magnesium), zinc alloys provide minimum tolerance, better finishes, thinner thicknesses and ribs. High zamak ductility, just as its excellent castability and resistance, are much appreciated by technical offices because they considerably increase the possibilities of use in the die-casting process and provide great flexibility in the design of parts and components. Accurate die-casting and application flexibility. This strength increases when die-cast zamak products are galvanically finished ( zinc-, nickel- and chromium-plating, glazing, etc.). Good corrosion strength, even under critical weather conditions (such as cass test). Die-cast zamak products have good impact, wear and tensile strength, above all when compared to moulded plastic products. DIE-CAST ZAMAK PRODUCTS are cheaper and lighter than brass ones. If used in place of other materials, zamak offers several advantages in die-casting processes:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |