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The schematics diagram of flame spray process is shown in Fig. 5. Fig. 5 Schematic diagram of Flame spray process. ISSN: 2277-9655 [Kumar * et al., 7(3): March, 2018] Impact Factor: 5.164 Wire arc spray is a coating process in which where two consumable metal wires are fed independently into the spray gun. These wires are then charged and The state-of-the-art process of hardmetal coating preparation by thermal spraying is illustrated in Figure 2, showing the deposition by HVOF spraying. Coatings are usually prepared from feedstock powders consisting of small hardmetal particles, commonly in the size range 10-45 μm. they are (i) cold spraying, which consists of kinetic-based deposition of metal or metal alloy particles at relatively low temperatures; (ii) flame spraying, comprising particle deposition using a combustion flame jet; (iii) electric arc wire spray, which utilizes an electric discharge from electrodes around a carrier gas stream to generate a … and separate the size distributions of particles produced by atomization of molten metal at either the anode or cathode by assuming that both follow a log-normal distribution. (This assumption was also verified experimentally). It was shown that particles produced by the anode are almost 1.1.2.1 Description of the Wire-Arc spraying process Occasionally, the process may be automated through a spray pretreatment process. A batch powder coating system: The 'pretreated' articles are jigged and hung into the coating booth on a fixed or rotatable jig-holder. The manual coater coats the components from all sides. The articles are then moved out onto an oven trolley Swirl pressure gas atomization is used to produce metal matrix composite powders in a spray process. Here, solid particulate material (typically ceramic particles) is co-injected together with the The Arc Spray process utilizes a DC power source at high amps (usually 650 amp) to energize negative and positive wires. Tiny droplets of molten metal travel through the arc and onto the base metal or joint being worked. As a result, the spray arc transfer method is ideal for thicker metals, butt, or fillet joints. Uses for the molten metal thermal spray process include the fabrication of molds, masks and forms for the plastics industry, using low melting point bismuth based alloys (the Cerro family of alloys); the deposition of solder alloys to joints that would be coalesced using torches or ovens; and, the production of metal powders. Powder Flame Spraying The choice of this process depends on the following criteria: • Thickness of the part he process is perfectly suited for coating parts that are up to 6 mm thick. • Thickness of coating The process allows controlled thickness ranging from 80 to 120 μm (Rilsan®ESY grades), and from 100 to 150 μm (Rilsan ES grades). • Size of part ing, although in fact, the thermal spray coating process and the protective film it produces are closer to a liquid-applied coating system. Arc-spray application of thermal-spray metal coatings was a shop-bound process until the 1990s, when portable arc-spray equipment was developed and introduced into field maintenance coating procedures. Moreover, the thermal spray process parameters that affect the prope