Powder coating techniques

Powder coating techniques are also used, including fluidised bed and electrostatic spraying. 

It can help to do different experiments simultaneously. In some areas of technology (perhaps not in powder coatings) techniques are coming or are available to do large numbers of experiments at once, with automatic registration of the results. 

Coating of substrates (particularly metallic substrates) with particulate plastics is a well-established technology. The fluidized-bed process was developed in 1952. The electrostatic powder coating technique introduced in 1965 has, however, made a substantially greater impact [3.46]. These two processes are discussed in Section 8.3.5. 

After the application of the aluminum coating to the steel substrate, a heat treatment is often applied. Coatings resulting from vacuum deposition, electroplating, electrophoretic application, cladding, or powder coating techniques are annealed to provide adhesion by diffusion alloying [125],... 

N Peamchob, R Bodmeier, Coating of pellets with micronized ethylcellulose particles by a dry powder coating technique , IntJPharm, 2003 268 1-11... 

The powders are expensive, but automated coating and 100 percent utilization of powder are economical. Coatings are applied to metals for electrical insulation, corrosion resistance, and simple decoration. Thick coatings can be applied in a single pass. There are three specific powder coating techniques fluid bed, electrostatic fluid bed, and electrostatic spray. 

Wattnasiriwech, D. Wattnasiriwech, S. Stevens R. (2006). A sol-powder coating technique for fabrication of yttria stabilized zirconia. Materials Research Bulletin. Vol. 41, pp. 1437. 

Cascade coating The cascade coating technique is used extensively for the external coating of metal pipes with polyethylene to convey natural gas throughout Europe. There are several ways of using this technique but in all cases the pipe is evenly heated to a surface temperature of 250-350°C. Powder is then poured from above, cascaded , onto the rotating pipe. A second heating operation may be necessary to completely fuse the powder. 

Miscellaneous powder coating methods Apart from the coating techniques described briefly above, the jobbing or custom coater has a whole armoury of other methods which are more or less related to those described above. 

There are different coating techniques. The woven and nonwoven fabrics normally involves three steps as it passes from the unwind roll to the rewind roll. Powder is metered onto the fabric, heated in an oven (gas or electric) that are usually divided into several heating zones, and cooled by a chill roll. 

The US Air Force has studied the encapsulation of liq monoproplnts such as alkyl nitrates in polymer films to form small spheres much like ball powder for use as gun proplnts (Refs 6, 8 9). Suspension coating techniques were used, and microcapsules were made with gelatin,... 

Ranney, M. W., Powder Coatings and Fluidized Bed Techniques, Noyes Data Corp., Park Ridge, NJ (1971)... 

Interconnects are formed into the desired shape using ceramic processing techniques. For example, bipolar plates with gas channels can be formed by tape casting a mixture of the ceramic powder with a solvent, such as trichloroethylene (TCE)-ethanol [90], Coating techniques, such as plasma spray [91] or laser ablation [92] can also be used to apply interconnect materials to the other fuel cell components. 

Powder coating is an effective way of protecting metal surface from deterioration. Electrostatic powder coating is a common technique used in various... 

---