Testing automobile parts, aviation equipment and buildings using salt spray machine

The Composite Salt Spray Test Machine (YWX/Q-010X) is used to evaluate the anti-corrosion properties of all painted, coated, and electroplated surfaces under salt spray conditions. The device meets the requirements of GB/T 2423.18, GB/T-10125, IEC 60068-2-11, GMW 14872, TCSAE 71, VCS 1027_1449, PV 1210, etc. The LISUN salt spray test machine does measurement by imitating elements more frequently found in the real world, such as salt spray, hot air drying, humidity, low temperatures combined, and loop in any combination.

Additionally, it is frequently used to evaluate products utilized in environments that undergo rapid change, such as electrical and mechanical equipment, building materials, coatings, and automotive and aviation parts. This article will discuss what a composite salt spray test machine is, the product detail, its basic test principle, use, installation procedure, and lastly precautions when using the machine.

Composite Salt Spray Test Machine (YWX/Q-010X)

The requirements of GB/T 2423.18, GB/T-10125, IEC 60068-2-11, GMW 14872, TCSAE 71, VCS 1027_1449, PV 1210, etc. are fully met by the YWX/Q-150X series Composite Salt Spray Test Machine by LISUN. It performs measurements by imitating environmental conditions that are more frequently found in the natural world, such as salt spray, hot air drying, humidity, low temperature mixed, and loop in any order. It is frequently used to test products used in significantly changing environments, such as automotive components, aviation equipment, building materials, coatings, electric and electrical gear, etc.

The equipment is used to test the anti-erosion quality of the surface of all materials following painting, coating, electroplating, anodizing, and rust-proof lubrication, to put it simply. For measuring the corrosion resistance of goods, paints, coatings, and other materials over a predetermined period of time, the Salt Spray Tester offers a high-saline fog environment. In order to test the electrophoretic coating, sodium chloride solution is sprayed using a salt spray machine.

Product detail

The salt spray test machine’s test temperature range, according to product specifications, is +20°C–+80°C. The saturated barrel temperature is between 47°C and 70°C, the machine’s temperature uniformity is 2°C, and its temperature fluctuation is 1°C. The relative humidity ranges from 30 percent to 98 percent RH (or 3%) Additionally, the test period for the chamber is 0-999H, M (adjustable), the settlement is 1-2ml/80cm2/h, and the spray method can be programmed to be spray, dry, or wet. Last but not least, the machine’s demisting method utilizes exhaust fog by extruding air, and it has an extensive holder, allowing the machine to meet the standards.

Additionally, the machine has a spray regulator that makes it simple to change the spray’s density. Additionally, the test chamber has a heater at the bottom that heats water and regulates temperature. Additionally, it includes a sealing sink that uses the water seal principle to prevent spray leakage, and both the inner and outer shells of the salt spray test chamber are composed of PVC materials to more effectively resist corrosion. Last but not least, the salt spray test chamber has a transparent test lid that makes it easier to see the test results.

The salt spray machine test principle

The cyclic corrosion test of the spray process, the wet and heat process, and the standing and drying process make up the Composite Salt Spray Test Machine. The schematic schematics for these three processes are shown below: 

1. Spray method

The system consists of a tank for holding salt water, a pneumatic system, a spray tower, a nozzle, etc. The salt solution is atomized by compressed air through the spray nozzle as it flows naturally from the outside into the test chamber.

2. Damp heat test

The steam generator, blast, water circuit, condensation device, and other components make up the damp heat test system. Following the salt spray test, the machine will set up a defogging program to quickly remove the salt spray from the test room. The water evaporator will then produce the proper temperature and humidity in accordance with the temperature and humidity settings made by the controller. In general, after the temperature is steady, the humidity will be more precisely regulated and consistent. The damp heat test’s temperature and humidity parameters are as follows: 30 to 60 degrees Celsius; 80 to 98 percent relative humidity.

3. Drying procedure

On top of a moist heat system, a standing and drying system can be added if necessary to imitate a normal atmospheric pressure environment test (temperature 23°C to 2°C, humidity 45 percent to 55 percent RH). The humidifier or dehumidification system then cooperates with the controller to produce an environment that satisfies the test requirements. First, quickly remove the humid and hot test environment from the previous section by setting a defogging program to create a relatively clean test environment. The drying test’s temperature and humidity conditions are as follows: Temperature: 20°C–60°C; relative humidity: 30–60% RH (corresponding to the appropriate temperature point).

The installation procedure of the machine

The first step in the installation of the salt spray test machine:

• Filtered industrial water or tap water is required for water quality. The filtered water has a salt spray corrosion cabinet pH level.
• To maintain a regular flow of water, the required water pressure is one and a third kg.
• Interface requirements: A hose connection and a sealing ring should be used to secure the equipment’s water supply port to avoid leaks.

Second, the requirements for the salt spray test box power supply system

• Single-phase, AC, 220 volts, 50 hertz
• Currently necessary: maximum 15 A
• Installation of an independent leakage protection switch is required.

Third, install the air intake system for the salt spray test chamber.

• Air compressor or air supply pipe pressure must be less than 3 kg, and it must be dry and clean.
• Equipment utilizing fast connectors for simple disassembly and maintenance is required.
• Time requirement: During the equipment’s regular operation, the test equipment must be available for an extended period of time without interruption.

Fourth, specifications for the salt spray test chamber exhaust system

• PVC polythene material is required as a material (corrosion resistant)
• The interface must have a hard tube that is connected to the device exhaust port and is sealed with a sealant to prevent air leakage.
• Fifth, install the drainage system for the salt spray corrosion testing chamber.
• Drilling requirements: To guarantee proper drainage, the wall opening height must be lower than the drainage outlet because the equipment is natural drainage without pressure.
• Interface requirements: To prevent leaks, the salt fog test chamber outlet should be fastened with a sealing ring and linked to a hose or hard pipe.

How to use the salt spray test chamber

When using the device, the power supplies for the air compressor and salt spray box must first be connected, followed by the air pressure air pipe. Then, once the low water level on the panel is off, add clean or distilled water to the water inlet in the cabinet and behind the cabinet. Otherwise, it won’t function properly. The drainpipe and exhaust pipe are connected in the following phase, and the indication is now open to the left. In order to stop salt spray from leaking, add water to the insulating tank.

The matched solution is then prepared for testing using the test solution preparation procedure in accordance with the actual test requirements. Then, pour the brine into the salt replenishment bottle to automatically fill the spray tower in the laboratory with salt water and cause the syrup to flow there. The wet bulb thermometer is filled with water, gauze is used to cover it, and the gauze’s end is inserted into the wet bulb. Lastly, Set the decompression valve to the proper setting, place the sample on the rack, and then start the test.

It must also be noted that one must avoid direct sunshine and heat near the salt spray tank and ensure that the area is well ventilated. Additionally, it’s crucial to regularly clean and maintain the pressure tank, saltwater tank, and nozzle of the salt spray test chamber. Additionally, don’t fill the box with explosive or flammable materials.

Precautions

The following precautions must be taken when using the device:

1. The salt spray test chamber and any necessary pipes must be constructed out of robust materials that won’t interfere with the corrosion test of the spray or corrode on its own.
2. The test solution that is sprayed onto the test piece must not return to the saltwater tank and be used for the test.
3. The solution that has gathered at the top of the salt spray chamber should not drip onto the test piece, nor should the spray nozzle spray the test liquid directly onto the sample.
4. The spray taker is set next to the test piece and has a horizontal take-up area of 80 cm2 and a diameter of roughly 10 cm (near the nearest and farthest point of the nozzle).
5. The presence of an air purifier is necessary since compressed air shouldn’t contain grease or particles. You must maintain an air pressure of 1.00 0.01 kg/cm2. Compressed air needs to be preheated in order to maximize compression since it absorbs heat when it expands. the air’s humidity and temperature, as indicated in Schedule 2, in order to produce a homogenous temperature spray.
6. The salt spray test chamber’s spray liquid volume is computed continuously. An average of 1.0 to 2.0 ml of saline solution should be collected on the container every hour. The average value should not be sprayed after the spray liquid has been collected for at least 16 hours.
7. The pressure tank’s temperature should be maintained at 47°C, and the temperature of the saltwater tank should be 35±1°C.
8. The sodium chloride solution content in the test saltwater tank should be kept between 40 and 60 g/L. The test salt liquid needs to be refilled if it is not consumed within a week. If the test will take more than a week, it should be performed. Cleaning of the interior, the discharge of the heating tank’s water, and the test salt liquid.
9. Water should be introduced to the sealed water tank during the experimental procedure if there is experimental mist leakage at the edge of the experiment cover. The water in the hot water tank needs to be replaced if the test period lasts longer than one month.
10. The salt spray test chamber’s relative humidity must be kept at or above 85%. By coming to an agreement with the customer, the greater relative humidity needs can be established.

FAQs

What are the steps involved in the test principle of the machine?

The test principle involves 3 steps. They include:

1. Spray process
2. Damp heat process
3. Drying process
4. What are some important features of a salt spray test machine?

Important features of the device include

1. Spray density may be easily adjusted thanks to the spray regulator.
2. A heater that is installed in the test chamber’s base and is used to heat water and regulate temperature.
3. It is equipped with a sealing sink that uses the water seal concept to prevent spray leaks.
4. The Salt Spray test chamber’s inside and external shells are constructed of PVC to more effectively avoid corrosion.
5. A transparent test cover makes it simpler to see the test conditions.

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

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Tags：YWX/Q-010X