Electroplating is the deposition of a metallic coating onto an object by putting a negative charge onto the object and immersing it into a solution, which contains a salt of the metal to be deposited. The metallic ions of the salt carry a positive charge and are attracted to the part with a negative charge. When they reach it, the negatively charged part provides the electrons to reduce the positively charged ions to metallic form.
How does it work? Look at the figure below, and then follow the written explanation. Imagine that we have an object that is made of copper or steel, and that it has been properly cleaned, and that we now want to plate it with nickel. A wire is attached to the object, and the other end of the wire is attached to the negative pole of a battery (the wire is blue in this picture). To the positive pole of the battery we connect the red wire; the other end of the red wire we connect to a rod made of nickel.Section 2, Research and recording of information Now we fill the cell with a solution of a salt of the metal to be plated.
It is theoretically possible to use a molten salt, and in rare cases that are done, but most of the time the salt is simply dissolved in water. The NiCl2 ionises in water to Ni++ and two parts of Cl- Because the object to be plated is negatively charged, it attracts the positively charged Ni++. The Ni++ reaches the object, and electrons flow from the object to the Ni++.
For each atom of Ni++, 2 electrons are required to neutralize it or ‘reduce’ it to metallic form.Meanwhile, the negatively charged Cl- ions are attracted to the positively charged anode. At the anode, electrons are removed from the Nickel metal, oxidizing it to the Ni++ state. Thus the nickel metal dissolves as Ni++ into the solution, supplying replacement nickel for that which has been I have also visited another website by searching it on a search engineElectroplating Electroplating is the electrochemical process of depositing a metallic coating on the base material of an object when it is immersed in a plating solution in such a manner that a suitable low voltage electric current flows through it, causing the metallic coating to be attracted to the object to be plated. HMQ offers a wide-variety of electroplated finishes, including: Chrome plating, Copper plating, Nickel plating, Sliver plating, Zinc plating Section 2, Research and recording of information http://www.aimf.org.
au/about.htmWHAT IS METAL FINISHING? Metal finishing is the process of changing the surface of an object; for the purpose of improving it’s appearance and/or durability. ELECTROPLATING Electroplating is an electrochemical process used to deposit a metallic coating on the base material of an object by immersing it in an electrically charged solution so that a suitable low voltage electric current flows through it, causing the metallic coating to be attracted to the object being plated.Some of the more common electroplated coatings include brass, cadmium, chromium, hard chromium, copper, gold, nickel, silver, tin and zinc. ORGANIC COATING Organic coating involves the process of depositing a pigmented coating on the surface of an object by dipping, flow coating, conventional spraying, electrostatic spraying and powder coating. Powder coating is the only technique that involves application of a powder; the remainders use a liquid paint. Application techniques include dip coating, conventional spraying, electrostatic spraying and powder coating.
POWDER COATINGOne of the newest and most environmentally sound applications in the industry. Applied electrostatically or by fluidised bed, these plastic coatings come in an almost unlimited range of colours. As there are no volatile thinners used, all of the oversprayed materials are recovered and reused.
The coatings are applied dry, melted, flowed and fused, making a pinhole free finish for beauty, long wear and superb corrosion resistance.ELECTROLESS PLATINGElectroless plating is the chemical deposition of a metal coating on a substrate by immersion in an appropriate plating solution. Electricity is not involved in this process, therefore heavy and uniform deposits can be easily obtained which posses unique mechanical, chemical or magnetic processes. The process can be applied to properly treat non-metallic objects such as plastic and glass.
Section 2, Research and recording of information Section 2.2 Evaluate and record progress, adapting the original research plan if necessary to meet new challenges. In this section I have compared the research to my original research plan and have stated if the research links to my objectives and will be needed to analyse in section three.