1. Application scope of 20 cubic meter metal corrosion aerosol chamber
Used in medical equipment, surgical instruments, packaging materials, etc., 5 types of round metal sheets (stainless steel, carbon steel, copper, aluminum, zinc), 24mm in diameter, 1mm thick, 3 pieces of each type. If it is a small material, a 1 cubic meter metal corrosion aerosol cabinet can be used. If the integral equipment is a 20 cubic meter metal corrosion aerosol chamber.
2. 20 cubic meter metal corrosion aerosol chamber test method
The products are hung at equal distances along the inside, middle and outside of a diagonal line of the aerosol chamber (cabinet). According to the volume of the aerosol aerosol chamber (cabinet), prepare the required disinfectant according to the disinfectant product instruction manual (concentration and usage) and number of cycles, and calculate the spray time according to the flow rate of the spray device; the disinfection machine adjusts parameters according to the instruction manual and number of cycles. Set the startup time. If you use a disinfectant with unstable disinfectant preparation, such as an oxidizing disinfectant, it should be prepared on the same day and diluted to a certain multiple. Pay attention to cleaning after use.
3. Operation procedure of 20 cubic meter metal corrosion aerosol chamber
Start---Settings can be divided into manual settings and automatic settings---temperature and humidity range---spray time---interval time-----replacement time----number of cycles.
Since the objects and environments sterilized by disinfectants or disinfection equipment may have corrosive effects, corrosion tests should be conducted on the corresponding metals or alloys. If there is no specific use object, commonly used carbon steel, aluminum, copper and stainless steel materials should be tested.
Reference test equipment: 20 cubic meter corrosion aerosol cabinet
The requirements for metal corrosion testing are as follows:
1. For metal corrosion test, you can use 20m³ or 20m³ aerosol cabinet. If the sample is a small amount, use 1 cubic meter, otherwise choose 20 cubic meters.
2. Applicable disinfection methods are: a. Aerosol spray chemical disinfectant. b. Disinfection equipment and chemical disinfectants using ultrasonic atomization, vaporization (dry mist) or gas disinfection.
Note: For chemical disinfectants used with ultrasonic atomization, vaporization (dry mist) or gas equipment for disinfection, the same equipment used for the air disinfection effect identification test should be selected, and the corresponding equipment is provided by the manufacturer.
Metal placement:
3 pieces of metal samples are hung in sequence at equal distances from the inside, middle and outside of a diagonal edge of the aerosol cabinet or aerosol chamber. The hanging height in the aerosol cabinet is the height of the sample at the center of the aerosol cabinet. In the aerosol chamber The suspension height is 0.8m~1.2m above the ground. The placement and location of the experimental and control groups should be the same.
GB/T27948-2020 General requirements for air disinfectants
Meet the standards: GB/T38498-2020 "Method for Evaluation of Metal Corrosion of Disinfectants" is divided into two methods: aerosol corrosion test and total immersion corrosion test. The aerosol corrosion test is used to evaluate chemical disinfectants in aerosol sprays. .
| Test chamber volume |
20 cubic meter metal corrosion aerosol cabinet |
| Test cabin dimensions |
800 × 1000 × 1250mm (L×W×H), allow ±0.1m3 deviation(Customized) |
| Temperature range |
23ºC±2ºC, adjustable |
| Humidity range |
50%±10%R Adjustable |
| Temperature fluctuation |
≤±0.5ºC |
| Evenness |
Temperature ≤1ºC; (no load) |
| Relative Humidity Fluctuation |
±2% |
| Cabin |
Stainless steel cabin, the inner and outer walls are made of SUS304 stainless steel with a thickness of 1.0 mm; the middle is high-density PU foam, which has a good thermal insulation effect. |
| Inner bladder |
The inner tank material is made of wide-format mirror 304 stainless steel, which is fully welded. |
| Door |
The size of the door is 1000×1250mm (W×H), single-opening is fully sealed, and the sealing is made of PTFE strip sealant (HBC1079 * grade sealant has passed the EU ROHS environmental protection standard, passed the EU REACH chemical regulation standard, Through the US FDA food hygiene standards). |
| Sealing material |
With silicone rubber strip and glass sealant |
| Test phase |
1. Put the used equipment into the aerosol cabinet (or room) at one time, and close the door. After that, all operations and manipulations of instruments and equipment are carried out in the cabinet (or outdoors through a window or remote control with a sealed sleeve. The door cannot be opened until the end of the test.
2. The spray device and the disinfection machine are operated according to each cycle time, starting, spraying, sterilizing, and ventilating for 45 operations.
3. At the same time, the aerosol cabinets (or chambers) of the control group and the test group were sampled before disinfection, and the control group used the test water for repeated tests.
4. After the test, carry out cleaning and weighing to calculate the corrosion rate. |
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