How to operate salt spray test chamber correctly

How to operate salt spray test chamber correctly

Salt spray corrosion test chamber is for surface treatment of various materials, including metal plating, hardware, electronic components, chemical paints, paints, automobiles, motorcycles, hardware and sanitary ware, screws, springs, magnetic materials, organic and inorganic coatings, anodes Processing, anti-rust oil and other industries quality testing, testing the corrosion resistance of their products.

Salt spray test chamber installation method replenishment system installation

a Water quality requirements: add filter for industrial water or tap water (filtered pH between 6.5-7.2) or pure water (mineral water containing minerals cannot be practical)

b pressure requirements: water pressure in the 1-3 kg, in order to ensure the normal water.

c Interface requirements: The equipment outlet should be hosed and sealed with a seal to prevent leakage.

Drainage system installation

aDrilling requirements: The equipment is natural drainage without pressure, the wall opening height is lower than the drainage outlet, to ensure that the drainage is working properly

b Interface requirements: The equipment outlet should be connected with a hose or a hard pipe. Use a sealing ring to prevent leakage.

Intake system installation

a Pressure requirements: air compressor or air supply pipe pressure ≥ 3 kg, and dry and clean

b Interface requirements: The device uses a quick connector for easy removal and maintenance

c time requirements: the equipment must work for a long time to supply air must not be interrupted halfway

Exhaust system requirements

aMaterial requirements: must use pvc polyethyl alcohol material (corrosion resistance)

b Interface requirements: The device exhaust port should be connected with a hard pipe, sealed with a sealant to prevent air leakage.

c. Drilling requirements: The equipment is naturally exhausted. The opening height of the wall needs to be slightly higher than the exhaust hole to ensure that the gas is condensed and flows back to the test chamber.

Salt spray test box test method First, the salt spray test box power (plug plug) press the red power switch, salt spray box panel from left to right, respectively: low water level A light, low salt water B light, low water level C Light. Pour distilled water directly into the test chamber and turn off the indicator light below the water level A and stop adding water. Use plastic measuring cylinders, glass rods, distilled water, etc., and configure the solution as required by the test. Open the lid labeled "Reagent inlet", pour the configured solution, and turn off the low-brine B light. Stop adding the solution. Open the “Manually add water to the pressure tank” valve (red knob, screw to vertical to open) and add distilled water. When the low-level indicator C goes out, stop adding water and close the valve. Open the test box lid and place the V-shaped sample holder with the glass rod. Put the desired test sample and close the lid. After closing the lid of the salt spray test chamber, pour a certain amount of distilled water into the tank lid for water sealing. (Distilled water should exceed the gap between the lid and the box) The air compressor is energized, and the air outlet of the air compressor is connected to the inlet of the salt spray box, and the red button on the air compressor is pulled up to open the valve switch (with the air outlet) The instrument is set up in parallel, vertically , for example. The total test time is 48 hours, the spray is 8 hours, the interval is 2 hours, the laboratory temperature is 35°C, and the pressure tank temperature is 47°C. The timer is set to 0048H and the programming timer is set to 02H08H. Press the operation switch on the panel, the laboratory temperature first press the "SET " key, the number begins to flash, according to the "upper" "down" "front" button, set to 35 °C. The pressure tank is set to 47°C. (The operating method of the temperature meter is the same as that of the oven, which can be set by referring to the setting method of the oven.) Press the spray switch and press the time switch to start the test. After the end of the test, the tank cover can be opened only after the defogging switch and other salt sprays are discharged outside. Air compressors need to be vented after every week. (At the bottom of the air compressor, there is a valve, which is unscrew with a wrench to discharge water and gas. After closing, the valve is closed.) The valves at the rear of the device are drain valves, and the middle is the inlet valve. If you do not use the salt spray chamber for a long time, open the left and right valves and drain off the liquid. Method for identification of samples after salt spray test chamber test

After the end of the salt spray chamber test, carefully remove the test sample from the salt spray chamber, gently rinse with flowing cold water (less than 35°C) or remove the salt deposits from the surface with a cleaning tool such as a seaside, and immediately proceed to 80 ~100 °C, about 30 minutes of drying (if not drying can be clear, except for the tester), and promptly check the test sample for corrosion or other defects.

From the routine records of test methods, it is understood that the following aspects need to be considered:

1. The appearance of the test sample after the test

2. Appearance after removal of corrosion products

3. Part, quantity, and condition of corrosion defects (pitting, cracks, bubbles, etc.)

4. The erosion time or the time before the beginning of corrosion

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