Electrostatic Spray Guns Vs Ulva Paint
Electrostatic spray systems are used most often when damping, or sealing, an electrical circuit. The electrical current passes through the semi-permeable membrane. Where the system has a high electrical resistance, the charge will be retained until the coating in the discharge path is broken by an actuation force, such as a pulling force or an external electrostatic charge. This process will continue until the charge is fully discharged, or the damping path is restored to its original state. The process is referred to as electrostatic confinement. This article discusses the application of electrostatic spray systems, how they work, and their advantages.
In wet worksuits electrostatic spray application has many advantages over other methods such as the use of capacitors. First, the application continues to work for days after the work suit has been closed. This allows an artist to complete large paintings and sculpture without the interruption of drying that can occur with other methods. Second, the electrostatic charge stays in the discharge path longer, allowing a greater length of run time between reapplication of coating or paint to prevent charge migration and increase the longevity of the paint job. The system is also able to deliver more colored and thicker paint into the discharge path because of its higher charge density.
The application of this system in agriculture has not changed much in over the years. A steady supply of charge and discharge lines is needed to manage the moisture content in the atmosphere. It is important to keep the surface of sensitive growing crops well ventilated and to apply the coating or paint in small batches to avoid surface damage. A high pressure sodium delivery system is the primary method of delivering the charge to the growing zone. Timing is essential in this process as a crop is only cultivated at certain times of the year.
Certain crops require aerial applications of the electrostatic spray system to control weevils such as whiteflies. Weevils are a common pest problem that appears during the growing season and at other times of year. The whitefly control process is usually very labor intensive as the insecticide must be applied early in the development of the plant to prevent the development of a resistance population. If the application of the insecticide is delayed it can create a very serious problem to the crop production.
The application of this system is simple but labor intensive and must be carefully monitored to prevent excessive application. A high pressure sodium delivery system is used for the application of the electrostatic spray. This delivery system provides good coverage for a wider area than a paint pressure pot or foam gun alone. When spraying cottonseed and other sensitive crops with this system there is the need for a release agent such as the paint pressure pot. This is not as necessary with ulva applications as the ulva crystals will release into the air and remain airborne for a shorter period of time.
The other variety of electrostatic spray gun is the electric charge gun. These guns will provide better coverage in smaller areas because they have a much smaller footprint. This is important when spraying a plant such as a vegetable field as well as citrus groves, trees, golf courses and many other sensitive locations that are too large to cover with a conventional paint system. These systems are most effective when using a combination of both the electrical charge and the ulva spray. Both systems require constant monitoring to prevent excessive electric charge build up.
Both systems require constant painting over a period of time to prevent the build up of static charges. This requires the operator to move the brushes closer to the surface to apply the paint. Once the painting is complete, the area needs to be covered to prevent the build up of static charge again. This is where the electric charge system comes in. The charge is used to power a fan that is able to blow away the charged particles from the surface.
There are advantages and disadvantages to both systems but the choice is ultimately yours. As an example, the paint systems available at your local home improvement store may be cheaper but you do sacrifice the ability to use them on larger surfaces. When using the electric charge system you do not have this limitation. Ulva and electrostatic spray guns are ideal for larger projects that require a more aggressive approach to coverage. Make the decision based on your project requirements, your experience and personal preference.