WET BLASTING INFORMATION - AVIATION
Wet blasting is a surface finishing technique that uses a suspension of water mixed sandblasting granules with pressure to treat the surface of a material. The principle is simple: the abrasive with water or 'slurry' is mixed with compressed air and sprayed through a nozzle onto the surface of the material to be treated. The elements of the process can range from dirt removal to advanced surface treatment methods to have a specific effect. While heating the water, adding various chemicals and various sandblasting granules can make the cleaning process more convenient; Increasing the blast pressure, including harder blast granules such as aluminum oxide or glass beads will strengthen metal surfaces by toughening or preparing them for joining.
Wet blasting process has the potential to perform a wide variety of tasks within aviation surface finishing processes. Although the main mechanical option is dry blasting; Wet blasting is increasingly preferred because of its many advantages. It has versatility: It can result in every process positively, from light to more difficult tasks. Provides safer and healthier working environments: It does not generate dust or charged particles. Provides better surface finishing due to the lubricating and cushioning effect of water. Saykar has created an important accumulation of expertise in our country by keeping the automation and process under control in the wet blasting process.
Wet blasting is routinely applied on a range of aerospace components around the world, in the following processes:. Strengthening the turbine and fan blades with sandblasting technique. Preparing surfaces before bonding, coating and painting. Paint removal. Oil, rust and scale removal. General cleaning for revision and crack detection. Saykar has developed some of the versatile and controllable wet sandblasting systems and gained experience by producing solutions for many aerospace applications. The variable and controllability of abrasive granules, nozzle and blast pressures, water temperature and a number of other factors in water make wet blasting a versatile process with clear advantages. The type of sandblasting abrasive used has a great influence on this technique. For example, aluminum oxide is used to achieve a roughening effect and to create a matte finish on the surface. Ideal before painting, coating and bonding. The glass bead, on the other hand, gives a 'polished' surface. It can also be used for plastic abrasive scrubbing and cleaning applications. There are many acceptable blast abrasives, including bauxite, glass, ice, and even walnut shell. Changing the blast granule can change the process from a relatively simple cleaning to a surface treatment method. Water eliminates some of the dangers inherent in dry blasting. For example, dust clouds and charged particles from dry blasting, a potentially explosive mixture. It also reduces localized heating (by friction), making the process particularly advantageous for surface treatment of delicate substrates such as composites. The main advantage of wet blasting is that it offers superior surface finishing that can be achieved: The lubricating effect of wet blasting allows the slurry to flow from the surface of a component and provides a more homogeneous and better prepared surface for coating, painting or bonding. It is useful to review the main advantages of wet blasting as well as other advantages:. Its main equipment takes up less space. Low wear on parts. Low degradation of solid media and consumables. Effective filtering of abrasive particles. No need for pre-cleaning.
Particular attention should be paid to the following parameters.
Structure of the Sandblasting Abrasive - shape, hardness and size. Air Pressure - Determines the rate at which the slurry exits the blast nozzle and the kinetic energy of the process. Chemistry - How alkaline or acidic the slurry solution should be for cleaning or rust prevention . The number, size and angle of the blast nozzles used. These Process Variables Needing Attention. Changing these factors changes the effect of the process. By determining and controlling these parameters, customers can perform the operations they need, such as cleaning a composite surface or precise cleaning of mold parts. Today's most sophisticated wet sandblasting machines provide close control of abrasive density, process temperature, additives and blast pressures. This provides consistent and repeatable surface treatments for surface quality, which can be changed relatively easily.
We can say that the same is true for wet sandblasting as automation in production is becoming more common day by day. There are two main reasons to choose an automated action. Regarding the volume for smaller parts, hand sandblasting many individual parts can be incredibly expensive. For larger parts, automation ensures consistency. In highly regulated industries such as aviation, the quality of each part must be the same. This may be possible if each part is treated in the same way, with no variation. Wet blasting is also used for crack detection on aircraft wheels. A good example of this is ensuring that the surfaces of aircraft wings are perfectly prepared for adhering a de-icing coating. Automatic wet blasting ensures consistent cleaning of the surface and guarantees the same bond quality every time. Health and safety has turned towards automation.
Aviation industry is a major user of wet sandblasting for a variety of surface treatments. All surface treatment applications in the aviation industry can be accomplished with the wet sandblasting method. When replacing aircraft tires, the wheels are inspected to detect possible cracks. First, surface contaminants are cleaned by wet sandblasting. This process is done at a suitable pressure enough to remove dirt but not affect the paint layer. The technique has many uses in industry: paint removal, preparation of composites, and degreasing. However, the strongest usage example to date is to strengthen the material by sandblasting and hardening with spherical abrasive. Hardening is a technique that forms the surface of critical parts such as turbine blades. It compresses the surface to make it resistant to cracking, extending its service life. Sand hardening can traditionally be carried out by dry blasting as it hits the surface with greater force. However, wet blasting is becoming more common: It produces a much smoother surface and is unlikely to create surface contamination. For these reasons, aviation industry manufacturers around the world have started to use wet blast hardening. As a result, this versatility makes wet sandblasting increasingly important in the aerospace industry.