Pickling Pickling is a process through which "clean" portions of an item prior to the application of a paint or coating including those generated by a galvanic process. This task can be performed manually or assisted with special teams, when performed manually, is verified with the help of abrasives such as sandpaper or wire brush, so this method is effective when it comes to very small layer contaminants, and when the dimension of the piece is small, by the time the application is industrial, hand-sanding is made automatic grinder with pleasant or wire brushes, hydro blasting machines, sandblasting, cleaning or cavitation. National Magazine Exchange pursues this goal as well. Also important are the processes of pickling acid dipping or chemical which "cleaned" the piece by removing traces of grease, or dust are also called chemical cleaning. When talking about electric toothbrushes, is its main representative who are rotating, and that due to their easy replacement and excellent results, has a wide application, particularly in relation to the withdrawn slag on the welds, since apart from doing this activity together and massage to release a certain proportion of the stresses associated with welding, also entering the corners, very hard to clean place, in many cases the use of these elements is limited to those regions are not uniform and difficult access. With respect to hydro blasting and sand blasting, these systems takes advantage of the forced motion of a fluid usually water or air, to project abrasive particles to the surface to be cleaned, in the case of hidroblanting, it is possible to dispense of these particles, but for the sand blasting are essential in both cases using a venturi that sucks them and the projected speeds in some cases approaching that of sound, they are usually metal or sand granules, as is evident in these two cases, it requires pumps and compressors that can deliver required flow and pressure and nozzles that are not damaged by abrasion is usually found in very hard materials such as tungsten carbide, the nozzles are interchangeable and are coded by degree of convergence that is required. Obviously not these processes can be performed without adequate protection, which should be full body, with clean air insufflation (sandblasting), as the silica and other minerals produce respiratory disease in the lungs, as well as , the particles rebound strongly attacks the skin and eyes (Sand Blasting), noise is another agent to be avoided, since the days of work involving the presence of a large extent, should be available also for protection appropriate. In the case of hydro blasting, the operator needs a place that can adequately evacuate the fluid and the respective sealing, fluid pressures may exceed 1000 psi, enough pressure to cut the tissues of the body, so adequate body protection is essential, as well as operating procedures, properly regulated and reviewed.