Solar outdoor lights' hardware accessories
The main points of consideration for small hardware of solar outdoor lights are rust resistance, strength, thickness, aesthetics, whether or not to lose paint, and several other points.
Because the solar lights are used outdoors, so the hardware must have good rust resistance, the industry is now commonly used steel pipe is welded with a black pipe after painting, screws are commonly used iron nickel-plated, basically can not pass the 24h salt test. The thickness of the U-shaped bracket, like the head of the floodlight, must be sufficient to use a hot-rolled galvanized sheet for punching holes and then spray paint. Toothbrush journey light as a representative of the small journey light with the arm must first be thick enough, followed by the floor position must be full welding, welding seams thick enough and strong enough, the thickness of the base plate should also be sufficient. The support arm to pass the salt spray test must be selected galvanized steel pipe and spray paint after welding.
Salt spray test methods and determination criteria.
1. General Provisions of solar outdoor lights' hardware accessories
1.1 Purpose To standardize the main method and judgment criteria of the buckling salt spray test (NSS) for metal structural parts.
1.2 Application The specification applies to all metal structural parts, solid parts, electrical parts, and other company's test methods and judgment standards.
1.3 Responsibilities The head of the quality department is responsible for the preparation of test reports and determination of test results, and IQC is responsible for the testing of products.
1.4 Implementation The official implementation of the document control controlled issue date.
2. Reference standard of solar outdoor lights' hardware accessories
2.1 GB/T2423.17-1993 basic environmental test procedures for electrical and electronic products Test Ka: salt spray test method.
2.2 GB/T6461-2002 rating of metal and other inorganic coverings on the metal base body after corrosion testing of the type and specimen.
3. Test equipment for solar outdoor lights' hardware accessories
The test equipment required for the spray intermediate, brine bucket, test piece support frame, spray liquid collection solver, brine replenishment bucket, pressure bucket, compressed air supply equipment, and exhaust equipment, etc., and following the following conditions test.
3.1 The spray nozzle shall not directly spray the test solution to the specimen, and the solution at the top of the spray chamber shall not drip down on the specimen.
3.2 The test liquid dripping from the specimen shall not be used again for the test.
3.3 compressed air must not have grease and dust, there must be an air cleaner; air pressure must be maintained at 1.0 ± 0.1kgf/cm2 preheat to increase the temperature and humidity of compressed air.
(3) f.nk23aT!R4P12265033.5 spray level to take an area of 80 cm2, diameter of about 10 cm, placed near the specimen.
3.4 The amount of spray solution to the entire hour, in the collection capacity, should be an average of 1.6 ml of saline solution that can be collected per hour. Spray afLGV4T-eWVh1xP122650 solution should be collected continuously for at least 8 hours, the average value of which indicates the amount of spray; 6SQ blog space hT(m_x007_(_x0019_-jNiD).
3.5 The test brine bucket its sodium chloride solution concentration should be maintained at 40-60g/l.
4. Test conditions of solar outdoor lights' hardware accessories
4.1, test solution The test solution uses sodium chloride and distilled water, the concentration of which is (5 ± 0.1%) (mass percentage), the collection solution after atomization, in addition to the baffle block back part, shall not be reused.
4.2, solution PH value The PH value of the salt deep liquid before atomization is between 6. 5-7. 2 (35±2°C).
4.3 The temperature in the laboratory (refers to the temperature inside the chamber) 35±2°C.
4.4 Temperature inside the saturated pressure drum 47±1°C.
4.5 Saturated barrel pressure 1Kgf.
4.6 Spray volume At any position in the working space, the amount of salt spray deposition of continuous atomization for 8his collected by a funnel with an area of 80cm2, and an average of 1.6mL of solution should be collected per hour.
4.7 Continuous atomization time.
Note: If the product is used in a harsher environment, the continuous atomization time should be extended appropriately, according to the product specifications required atomization time for the test; if there are no special requirements or requirements lower than this specification will be implemented following this specification.
If the commitment letter provided by the supplier, salt spray test report, and other information reflected in the continuous atomization time is more severe than this specification, the test will be conducted according to the atomization time provided by the supplier, otherwise, the specification will be implemented.
5. Outdoor Solar Lights' Hardware Accessories Placement of the test piece
5.1 The tested surface of the specimen should not be sprayed directly with salt spray.
5.2 The test surface in the test chamber is very important to place the angle. A flat sample of the test surface facing up and with the heavy straight direction into 20 5 of the angle; for the surface irregularities of the test piece, can take a variety of placement states so that each major surface can simultaneously accept the spray of saltwater.
5.3 The test piece should be arranged so that the spray is free to fall all over the surface of the test piece and should not prevent the spray from falling freely.
5.4 The specimens shall not come into contact with each other or with metallic conductors or substances with capillary phenomena, and other objects outside the holder.
5.5 Salt solution is prohibited from dripping from one specimen to the surface of other specimens.
5.6 Test piece has an identifying mark sticky towel object, should be placed under the test piece as far as possible.
5.7 For a new test or a total test specimen more than 48 on the test, the tested specimen may be allowed to be shifted. In this case, the frequency of the number of shifts is to be determined by the operator but needs to be indicated in the test report.
5.8 The holder of the specimen should be made of inert non-metallic materials, such as glass, plastic, or coated wood products. The material used to hang the specimen should not use metal materials, but man-made fibers, cotton fibers, or other inert insulating materials.
6. Outdoor Solar-powered Lights Hardware Accessories Initial testing of the specimen
6.1 Appearance structural inspection The surface of the test specimen must be clean and free of oil, damage, temporary protective layer, and other maladies.
6.2 Electrical performance inspection
If the test is carried out on the whole of electronic and electrical products, the electrical performance must be inspected before the test, and test data must be recorded.
7. Outdoor Solar Lights' Hardware Accessories Pre-treatment of test pieces
7.1 The test sample must be carefully cleaned before the test, as far as possible to remove miscellaneous rolls (dust, oil, or other impurities). The cleaning method used should depend on the nature of the test piece material, the test piece surface, and dirt cleaning, should not use abrasive materials or solvents that may erode the surface of the sample.
7.1.1 Use a suitable organic solvent (the boiling point between 60-120 ° C) hydrocarbons) and a clean soft brush or ultrasonic cleaning device to thoroughly clean the sample being tested. After cleaning, rinse the specimen with a fresh solvent and dry.
7.1.2 The cleaned sample shall be protected from re-contamination by inadvertent touching.
7.1.3 the test should not be cleaned off before the test is intentionally coated with a protective organic film layer of the specimen
7.2 If the specimen is cut from a larger work with a coating, the covering layer in the vicinity of the cut area shall not be damaged. Unless otherwise specified, the cutting area must be protected by an appropriate covering layer that is stable under the test conditions, such as paint, paraffin, or tape.
8. Test procedure of Outdoor Solar Lights' Hardware Accessories
8.1 According to the test conditions to configure the salt solution and according to the specimen placement requirements to place the tested sample, turn on the power switch of the salt spray test chamber, the chamber, and pressure starvation and barrel into the heating phase.
8.2 After the temperature meets the temperature range required by the test conditions, turn on the spray switch and check whether the spray pressure is maintained at 1Kgf;
8.3 Set the timer according to the continuous atomization time requirement and turn on the switch of the timer, after the set spraying time is satisfied, the spraying will be stopped automatically.
8.4 After the test, first turn off the spray switch and then turn on the defogging switch to defog for about 20 minutes.
8.5 After the temperature inside the box is removed, close all switches of the equipment, and then you can open the door to take out the specimen.
8.6 During the test, if there is no special requirement, it is prohibited to open the door of the box on the way.
8.7 in the spray state, is strictly prohibited at the same time when the airline defogging, because due to airflow reversal may damage the equipment.
8.8 box of salt service gas inside the box is not clean, prohibit the opening of the box door to prevent the leakage of salt spray gas and other equipment around the box to create corrosion.
8.9 after the spray test, the specimen in the box is not allowed to stay longer than 30 minutes, so as not to stay too long and affect the test results.
9. After the completion of the test specimen processing
After the completion of the salt spray test, the test piece will be removed from the salt spray box, to reduce corrosion products off, the sample should be cleaned in the indoor air before natural drying 0.5-1h; then clean flowing water with a temperature of not more than 35 ° C will be carefully cleaned to remove the residual salt spray solution on the surface of the sample, followed by 30 cm from the sample at a pressure of not more than 200Kpa air blowing dry.
10. Final test of Solar Outdoor Lights' Hardware Accessories
10.1 Appearance after the test Check the appearance of defects, such as pitting, open lines, bubbles, and other distribution and numbers.
10.2 Electrical performance inspection.
If it is an electronic and electrical product as a whole for the test, the electrical performance needs to be tested after the test to check whether the electrical specifications are consistent with those before the test.
11. Rating and determination of test results
Our company uses GB/T6461-2002 "metal and other inorganic coverings on the metal base body after the test of the rating of the specimens and specimens" developed by the corrosion area for the rating method.
11.1 Rating calculation formula
The corrosion rating of a metal coating is obtained based on the percentage of the total area occupied by corrosion defects, calculated according to the following formula:
Rp = 3 (2 - LogA)
Where Rp - corrosion rating, rounded to the nearest integer, as shown in the following table:
A - The percentage of the total area occupied by the corrosion of the body metal.
B - According to the above formula, the relationship between the area of corrosion defects and corrosion rating can be derived.
1. For samples with very small defect area (such as less than 0.046%), if calculated according to the above formula, the rating will be greater than 10, so the above formula is only applicable to samples with a 0.046%;
2. In some cases, it may be difficult to calculate the accurate area, especially for deep processed samples, such as thread, hole, etc. in this case, the inspector should estimate the area as accurately as possible.
3. For SECC (galvanized steel sheet), when calculating the defect area, the notch of the specimen can be taken into account.
4. When calculating the defect area, the "total area" refers to the test area covered by the spray in the box, and the area not covered by other items is not included.
11.2 Test result determination
a, Rp = 10 test results can be directly through
b. Test results with Rp=7-9 can be conceded to receive if there is no special mark from users.
c, Rp = 3-6 test results, the need for the relevant functional departments to assess, and then judged according to the results of the assessment.
d. Test results with Rp=0-2 are judged as unqualified.