Polymer electrodeposition is an extension of coating technology to the field of electroplating. Similar to electroplating, it is a dip coating process. Metal plating technology utilizes the fact that metal ions, usually nickel 2 or copper 2, can be discharged at the cathode to get a well adhered plating layer of metal nickel, copper, the chemical deposition process can be described as 1/2 Me 2 + 1F (or 96500 coulombs ) electrons to 1/2 Me 0. In the electrodeposition of high polymers, the deposition reaction is described as R 3 NH + OH – + 1F → R 3 N + H 2 O or water-dispersed type conversion, ammonium ions into ammonia-type, water-insoluble polymers, called cathodic deposition . Alternatively, a large number of facilities utilize the anodic deposition process RCOO – + H + less 1F → RCOOH. It should be worth mentioning that the "R" stands for any of the widely used polymers (acrylics, epoxies, alkyds, etc.). The electrodeposition process is defined as "synthesis, utilization of water dispersion, electrodeposition—its" 1 large ion.
Advantages of Polymer Electrodeposition
Metal ions, usually 1/2 Ni 2+ , show an electric equivalent of 1/2 Ni 2+ equal to about 29.5 g, while polymeric ions usually used in electrophoresis show a gram equivalent (less) of about 1600. Thus, a 1F plate yields 30 grams of nickel and deposits 1600 grams of macromolecules. The advantage is even greater if we consider the thickness of the storage, since nickel has a specific gravity of 9, while pigmented organic coatings have a specific gravity of about 1.4.
Another advantage, which may also be the reason for the continued rapid growth of the industry. The polymer electrodeposition process is to form a uniform thick coating on all surfaces. Formed workpieces, including extreme depressions in car door interiors. This ability to extend the jacket into the groove is called throwing power.
Another benefit is the very low emission of VOCs (Volatile Organic Compounds), electrodeposition in powder coatings and radiation curing as a minimally polluting coating process. Finally, the cost of operating electrocoat tanks is lower than any other method of painting.
