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Anticorrosive coating thickness measurement

uvmeter — Wed, 29 Jul 2020 03:58:07 GMT

Anticorrosive paint is a type of paint used on the surface of an object to protect the inside of the object from corrosion. It is a kind of paint commonly used in industrial construction. It is widely used in aviation, shipbuilding, chemical industry, oil pipeline, steel structure, bridge, oil drilling platform and other fields, and is favored by the majority of construction manufacturers. Paint thickness meter can be used to test the coating thickness.
There are many types of anti-corrosion paints. According to the composition, they can be generally divided into: epoxy anti-corrosion paint, polyurethane anti-corrosion paint, acrylic anti-corrosion paint, inorganic anti-corrosion paint, perchloroethylene anti-corrosion paint, chlorinated rubber anti-corrosion paint, high-chlorinated polyethylene anti-corrosion paint; Uses can be divided into: anti-corrosion paint for pipelines, anti-corrosion paint for ships, anti-corrosion paint for metals, anti-corrosion paint for furniture, anti-corrosion paint for automobiles, anti-corrosion paint for rubber; according to the solvent can be divided into: water-based anti-corrosion paint, oil-based anti-corrosion paint;
Anticorrosive paint is a mixture of a variety of water-containing silicate minerals, the main chemical group is Al2O3 and SiO2 two oxides. Al2O3 is mainly derived from clay minerals. In addition to clay minerals, SiO2 also comes from particulate quartz. The closer the Al2O3 content and Al2O3/SiO2 ratio to the theoretical value of kaolinite minerals, the higher the purity of this type of clay.
characteristic
It can be used under harsh conditions, and has good durability and weather resistance. It can be used for 10 or 15 years under harsh conditions such as ocean and underground, even in acid, alkali, salt and solvent media, and It can be used for more than 5 years under certain temperature conditions.
ingredient

Ultraviolet disinfection

uvmeter — Tue, 28 Jul 2020 07:57:52 GMT

The principle of ultraviolet disinfection
Using ultraviolet , the bacterial protein is photolyzed and denatured, and therefore the aminoalkanoic acid , macromolecule and enzyme of the bacterial body are destroyed and died. At an equivalent time, when ultraviolet rays undergo the air, the oxygen within the air is ionized to supply ozone, which strengthens the sterilization effect.
Ultraviolet rays are mostly used for disinfection of air and object surfaces, with a wavelength of 2573A. it's used for air disinfection, the effective distance doesn't exceed Zm, the irradiation time is 30-60min, and it's used for disinfection of objects.The effective distance is 25-60cm, the irradiation time is 20-30min, and therefore the timer starts from the sunshine on 5-7min (the light must be preheated for a particular time, so as to ionize the oxygen within the air to supply ozone).
When the voltage of the ultraviolet source used for bai disinfection is 220V, the ratio of the environment is zhi60%, and therefore the temperature is 20°C, the intensity of the radiated 253.7nm ultraviolet shall not be but 70uW/cm2 (ordinary dao30W straight tube ultraviolet is found faraway from the tube Measured at 1 meter, measured at the space of use with special ultraviolet lamps, and therefore the ultraviolet intensity meter used must be calibrated).
Generally, it's tested consistent with the merchandise technical instructions of the ultraviolet source , and therefore the ultraviolet source manufacturer will provide the intensity description:
1. the middle intensity at xx mm is as high as xxx uw/cm2, just use an uv light meter to live this data.
2. there'll be a minimum intensity, and therefore the minimum intensity of the effective irradiation area reaches xxx uw/cm2. consistent with this data, it are often measured with an ultraviolet meter.

Bluetooth UV light meter

uvmeter — Thu, 23 Jul 2020 01:33:02 GMT

The UV light meter LS126C is designed in accordance with the detection requirements of germicidal lamps. It is equipped with a 1-meter test hook when leaving the factory, which is convenient for on-site UV intensity measurement. First connect the instrument to the APP dedicated to the mobile phone, hang the instrument 1 meter vertically below the lamp tube during measurement, and then turn on the UV germicidal lamp after the measurement personnel leave. You can view the data directly on the mobile phone. It can be said that the UV intensity tester realizes wireless detection of UV intensity.
LS126C UV light meter is a professional instrument for measuring the intensity of UVC ultraviolet germicidal lamps, that is, the ultraviolet radiation energy power per unit area. The instrument is equipped with a 1-meter test hook in accordance with the "WST 367-2012 Medical Institution Disinfection Technical Specification", which provides a 1-meter test hook to ensure that it fully meets the test standards. The LS126C UV light meter also has a Bluetooth data transmission function. After connecting with the mobile phone APP, it can monitor the intensity of the germicidal lamp in a certain distance in real time to avoid ultraviolet burns during the test.

Coating thickness gauge calibration

uvmeter — Wed, 22 Jul 2020 03:03:44 GMT

Correct coating thickness gauge calibration is essential to accurately measure bai. For calibration, a sample similar to the object to be measured later will be used, that is, at the same time, the standard sample and the object to be measured should have the same shape and geometry. Basically, the more standard samples of the measurement object match, the measurement result will be more accurate.
2. Make sure that the following properties of the calibration sample and the object to be measured match: - The radius of curvature of the surface - The substrate material (such as permeability, conductivity; in an ideal way, the standard sample and the measurement object should be the same material) - Substrate thickness - Measurement area size
3. Before starting the calibration, make sure that the calibration points, sensor tips and calibration templates are clean. If necessary, remove any deposits such as grease, metal chips, etc. Any impurities may affect the calibration and cause the calibration to be unstable.
4. Make sure to always find the same calibration position for each, especially the measurement of small parts and the measurement of corners. It is recommended to use a measuring bracket for small parts.
5. If using calibration foils, make sure they are placed on the plane of the substrate material. Air gaps under the foil must be avoided, as this will cause unstable readings. If it is curved aluminum foil, make sure they are placed on the substrate as shown below.
6. Precision thickness standards must be handled carefully. Any wear and tear of the thickness standard will be reflected in the wrong calibration value. Do not fold the calibration foil. Any buckling will cause an air gap under the film, resulting in unstable readings. Keep the thickness standard clean. Any grease, oil, dust or other accumulations must be avoided. The accumulation of aluminum foil will be regarded as the thickness and will cause a measurement error of the same value as the thickness of the accumulation. To give you a rough idea: a fingerprint accumulation is enough to cause an additional thickness error of several microns.
7. Stay away from strong magnetic fields during calibration.
8. More calibration standard thicknesses that can match the expected thickness will make calibration and measurement more accurate.
9. According to the electromagnetic induction method, measuring the thickness of the non-ferrous metal coating on the steel or iron substrate requires multi-point correction. The thickness standard sample must be made of the same metal as the object to be measured later.

UV mercury lamp energy meter

uvmeter — Tue, 21 Jul 2020 00:52:55 GMT

The application of high-pressure mercury lamps has spread to many fields. Humans have entered a new era in industrial lighting or indoor and outdoor lighting, and UV energy meters are inseparable from it.As the name implies, the high-pressure mercury lamp contains mercury in the lamp, and its components include a quartz arc tube; an outer bulb coated with phosphor; a metal bracket; a resistance component and a lamp cap. The arc tube is the core component and contains mercury and inert gas. After power on, the mercury vapor pressure in the arc tube is about 2 to 15 atmospheres, hence the name high pressure mercury lamp. The light emitted during discharge is white, and the luminosity is much higher than that of incandescent lamps. It has the advantages of simple structure, low cost, high luminous efficiency, long life, and power saving. Now it has been popularized for indoor and outdoor industrial lighting and street lighting.In addition, the application of ultraviolet high-pressure mercury lamps involves many fields. The spectral range of this lamp is between 350nm-450nm and the main peak is 365nm. It has a higher power density and effective ultraviolet wavelength. It is used in light curing; color printing ; Ink drying; furniture industry; decoration industry and outer packaging industry all require the participation of ultraviolet high-pressure mercury lamps.

LS120 UV energy meter is a professional instrument for detecting high-pressure mercury lamps. Some technical parameters of the instrument are as follows:Application Light intensity, energy and temperaturemeasurement of high pressure mercury lampSpectral range 315nm -— 400nm Peak Wavelength = 365nmIrradiance measuring range 0 --— 000 mW/cm²Irradiance resolution 0.1 mW/cm²Energy measuring range 0-999999mJ/cm²Energy measuring accuracy ± 10%, ± 5% (typical)Temperature measuring range -55°C-+125°CSampling speed 2048 times/second

UV sterilization information sharling

uvmeter — Mon, 20 Jul 2020 01:47:57 GMT

Seoul designs a type of product every 10nm, 255nm, 265nm, 275nm are all made, but currently the main one is still 275nm; LG keeps the two directions in parallel, on the one hand, the band decreases from 265nm to 263nm, on the other hand, it is as high as possible 278nm power, and think that 265nm is not an advantage in cost, 278nm can better meet the reality; Qingdao Jiesheng initially products at 280nm, and then gradually lean towards 270nm, although 255nm is also involved, the cost is too high and the shipment is small .
On the whole, gradual increase in power on 270~280nm chips is currently the choice of most companies. It seems that this is also the most effective way to accelerate the pace of commercialization of UVC LEDs.
Four big battlefields: surface, static water, flowing water, air
The UV LED industry divides the sterilization scenes into four categories according to the physical properties of the object to be sterilized: surface, static water, flowing water and air. So, in these four types of scenarios, which type of application has more potential? UVC meter can be used to test the uv irradiation intensity.
Although surface sterilization has the lowest requirements for UVC LEDs, which can meet the power of a few mW, we also ignore the fact that in the battlefield of surface sterilization, UVC LEDs are the easiest to replace, a combination of sun exposure, washing with detergent, and disinfectant. It has already occupied the minds of users in advance and cultivated strong usage habits. In addition, UVC LED only meets the need for disinfection, but cannot remove residual dirt. In the end, people still have to return to traditional cleaning methods.
Nevertheless, UVC LED is not without effect on the surface sterilization. Some clean corners in life are where it is used, such as the interlayer of washing machine drum, the interior of refrigerator and water dispenser. In addition, some special scenes can also be used, such as mother and baby Supplies, travel supplies, outdoor equipment, etc. A folding electric toothbrush that appeared recently satisfies the above conditions. It starts sterilization when folded, and closes after unfolding to avoid ultraviolet light to the eyes. It is more hygienic when carried, and the design is creative and practical. It is a product that is worth looking forward to.

Paint thickness affect the car quality

uvmeter — Sat, 18 Jul 2020 01:15:25 GMT

The paint finish of many cars is actually different. There is still metallic du paint in Bai, but not all black cars are metallic paint. People feel that metallic paint is actually harder and better than ordinary car paint. Do you know the difference between the thickness of the paint? Many people think that the paint on the car must be a little thicker, because in this case it will be more wear-resistant, but is it really the case? Does the thickness of the paint affect the car?How much do you know about car companies and do you know the current car paint technology? In fact, the thickness of car paint is mainly related to the current advanced technology. In the past, thick car paint was needed because the technology was not advanced enough. However, with the rapid development of technology, thin car paint can replace thick car paint. The function is actually The same, so there is no case that the reported paint is not good. Let me introduce the current paint.In the past, the car paint on the car actually had four layers, consisting of primer electrophoretic paint, middle coat paint, color paint and varnish. And everyone knows that the German car-making technology is very rigorous, and its paint thickness is relatively thick. In this case, most people think that German cars are better and Japanese cars are thinner, but there is no difference in quality. Japanese cars just remove the middle layer. In fact, the current technology does not have the middle layer. For the car, the layer is the same as the four-layer. The formula of the knowledge car paint is different.Many people worry about the effect of the thickness of the paint on the car. They feel that the paint has changed from four layers to three layers. It will be weaker than before or will suffer the following effects in terms of scratch resistance. But for the current technology, it has no effect, because what can affect the scratching of Chengdu is actually the hardness of the car paint. When the hardness of the three-layer and four-layer is the same, there is no difference. This is mainly It lies in the outermost paint film. The outermost layer is the real impact on the car.After talking about the difference between the thickness of the car paint, does the thickness of the car paint affect the car? Do you feel that you no longer worry about the problem of car paint? In fact, the technology is relatively advanced, so many things are changing. Our car Similarly, the equipment on the car has become more and more advanced. Whether the thin and thick paint of the car is scratch-resistant has no direct influence. Even the previous four-layer car paint will appear when the car crash occurs. The situation of scratching. coating thickness tester can be used to test the car paint film thickness.

Anti-corrosion paint thickness test

uvmeter — Fri, 17 Jul 2020 02:10:07 GMT

Anti-corrosion paint has the effect of slowing down the corrosion of the environment to the protected materials. Although it cannot be completely isolated, it has the functions of shielding, corrosion inhibition and cathodic protection for the protected materials. Different corrosion environments have different requirements for the thickness of the anticorrosive paint of the steel structure. Only when a certain thickness of the anticorrosive paint reaches a certain thickness will there be a protective effect of response. Therefore, it is necessary to test the anticorrosive paint of the steel structure with a paint thickness gauge.
Linshang LS220H is a paint thickness gauge, iron and aluminum, which is mostly used for the thickness measurement of steel structure coatings. This instrument is small in size and easy to carry around; the instrument has high measurement accuracy and can be sent to authoritative national measurement Institute measurement.
Coating thickness gauge LS220H for measuring steel structure
Coating thickness testing standards for steel structure anti-corrosion paint:
C2 corrosive environment (low corrosion): service life/dry film thickness: low: 80; medium: 150; high: 200;
C3 corrosive environment (medium corrosion): service life/dry film thickness: low: 120; medium: 160; high: 200;
C4 corrosive environment (high corrosion): service life/dry film thickness: low: 160; medium: 200; high: 240;
C5-I corrosive environment (high industrial corrosion): service life/dry film thickness: low: 200;
C5-M corrosive environment (high marine corrosion): service life/dry film thickness: medium: 280; high: 320;
The above is the test standard for the thickness of anticorrosive paint in different corrosive environments according to "Code for Construction Quality Acceptance of Steel Structure Engineering". If when the design does not require the coating thickness, the thickness of the steel structure coating should be 150 μm outdoors and 125 μm indoors. Although anti-corrosion paint can not completely isolate the corrosion, it can effectively reduce the corrosion and extend the service life of the materials. The steel structure must be coated with the desired paint thickness in strict accordance with the corrosion level, and checked with a paint coating thickness gauge to ensure that the thickness of the anti-corrosion coating is qualified.
As a paint thickness gauge, LS220H can help you to detect the coating thickness of steel structure according to the standard.

Medical uv lamp intensity test

uvmeter — Thu, 16 Jul 2020 02:11:15 GMT

Medical ultraviolet lamps mainly sterilize and disinfect indoor air. There are two methods: indirect irradiation and direct irradiation.
　　Indirect irradiation method: the use of high-intensity ultraviolet air sterilizer has the advantage of reliable disinfection effect and can be used when there are people indoors. The disinfection time is generally 30 minutes.
The principle of 　　 indirect irradiation method is to suck dirty air into the disinfection machine. The ultraviolet lamp is sealed in the disinfection room of the chassis of the air sterilizer, and the dirty air is filtered and sterilized before it is released. Since the ozone concentration in the air when the sterilizer is working is ≤0.1 mg/m³, human-machine coexistence can be achieved.
　　 High-intensity ultraviolet sterilizer has an ultraviolet peak wavelength of 253.7nm, which belongs to UVC, also known as short-wave sterilization. The shorter the ultraviolet wavelength, the greater the lethality.
　　Direct irradiation method: When there is no one in the room, use the ultraviolet lamp to irradiate directly. The number of disinfection lamps installed indoors is not less than 1.5W per cubic meter, and the irradiation time is not less than 30 minutes. The peak wavelength of the ultraviolet germicidal lamp is 253.7nm.
UV disinfection lamp can be measured by UV dosimeter.
　　The national regulations stipulate that the intensity of the ultraviolet lamp should be greater than 70uW/cm² at 1 meter below the center of the lamp. Ultraviolet lamps will attenuate, so the intensity of the lamp should be checked every time.
　　Intensity detection of ultraviolet lamp can use LS126C ultraviolet intensity meter. This is an instrument equipped with a 1 meter hook. The hook is made according to the length specified by the country. When using it, place the instrument directly under the vertical center of the lamp. The instrument has an automatic shutdown function. When no one operates for 10 minutes, the instrument automatically shuts down. When testing, personnel leave, turn on the lights after closing the door, to ensure that the personnel will not be injured by ultraviolet rays.

Automotive paint meter

uvmeter — Wed, 15 Jul 2020 01:36:22 GMT

In the detection of the automotive paint meter LS220, the car roof is generally used as a reference. If the value of other parts is significantly higher than the reference value, the part of the vehicle can be judged that it has been repaired by sheet metal and spray paint. In the second-hand car identification process, if the inspector finds that the difference between the value and the reference value is very large, it will further check whether the vehicle has traces of accidents there and determine whether it is an accident.
Generally, the thickness of most cars is between 80-140, and a small number of imported cars may reach more than 150. If you test the left door of the car, you can take the five points of the door up, down, left, right, and the middle to test five points. The value you want to add and divide by 5 is the average value. If the value of a point is greater than the average value of 30um or more, the car may be repaired. If you completely replace the car door, you need to check from the internal screw and other joints. If a used car belongs to an accident, then there must be traces of sheet metal or paint repair on the painted surface of the body, and the repair range will be relatively large. Therefore, as long as it involves the detection of second-hand accident vehicles, it is essential to do paint inspection projects. In this way, the historical situation of major and minor accidents that occurred in the vehicle can be revealed, and whether the vehicle belongs to the accident vehicle can be judged. It can be said that after reading the paint surface of the vehicle, you can roughly understand the scratching and accident history of the vehicle. Of course, if you want to completely determine whether the vehicle is a technically recognized accident car, you still need the equipment of the second-hand car appraisal appraisal through the *** equipment to integrate the chassis, front and rear anti-collision beams, body structure and other items. The test result shall prevail.
If you only check the paint surface of the car body, you can use the second-hand car identification artifact-"paint film instrument" is an instrument that detects the thickness of the car paint surface to determine whether the car has signs of sheet metal or spray paint.