Nozzle of salt spray test machine
- Material:
- Glass: Common salt spray tester nozzles are often made from blown special glass. Glass offers excellent corrosion resistance, resisting the erosion of salt solutions and ensuring long-term corrosion and damage from salt spray, thus ensuring accurate test results. For example, quartz glass nozzles are a common glass material. They are hard, heat-resistant, and corrosion-resistant, ensuring long-term stable operation.
- Other Materials: In addition to glass, some nozzles are made from corrosion-resistant materials such as plastic or ceramic, but the performance and lifespan of these materials may differ from those of glass.
- Structure:
- Nozzle Orifice: The size and shape of the nozzle orifice significantly influence the generation and distribution of salt spray. Generally, the orifice diameter is small, typically in the micron range. This allows the salt water to form fine mist particles under the action of compressed air at a certain pressure, thereby better simulating a salt spray environment. For example, some high-precision salt spray tester nozzles can achieve orifice diameters accurate to tens of microns, ensuring uniform salt spray particle size and distribution.
- Flow Guide: The flow guide guide guides the mixture of salt water and compressed air, allowing it to flow smoothly through the nozzle and form a spray. The shape and curvature of the flow guide must be carefully designed and manufactured to ensure smooth fluid flow and uniform spray. If the flow guide guide becomes narrow or deformed due to contamination such as oil, this will affect the formation of salt spray.
- Working Principle: The gas generated by the compressor in the salt spray tester is purified, preheated, and depressurized before entering the nozzle. The salt water supply system supplies salt water to the nozzle intake pipe. Under the action of the compressed air, the salt water creates a negative pressure in the nozzle, causing it to quickly pass through the nozzle orifice toward the top cone and diffuse throughout the workspace, forming a diffuse salt spray.
- Importance: Nozzle performance directly affects the test results of the salt spray tester. If the nozzle is clogged, damaged, or the spray is uneven, parameters such as the salt spray deposition and spray angle will be affected, affecting the accuracy and reliability of the test.
- Maintenance and Care: (Dongguan Zhongzhi Times Testing Equipment Co., Ltd.)
- Preventing Clogging: During use, ensure the water quality is acceptable. We recommend using distilled or deionized water to reduce the chance of impurities clogging the nozzle. Also, install an oil-water separator to prevent compressed air from introducing moisture, oil, and other contaminants into the nozzle, potentially causing oil contamination.
- Proper Installation and Use: When installing the nozzle, handle it with care to avoid impact or damage. During use, ensure the spray pressure is set correctly. Normal pressure should be between 0.07 MPa and 0.17 MPa. Excessive pressure can easily cause the nozzle to rupture.
- Regular Cleaning and Inspection: Clean and inspect the nozzle regularly to promptly detect and address any problems such as clogging or damage to ensure proper nozzle operation.