The surface roughness of the base metal and coating has an effect on the measurement. Roughness increases, the influence increases, the rough surface will cause system error and accidental error. In each measurement, the number of measurements should be increased in different positions to overcome this accidental error. If the matrix metal on the substrate is rough, the zero point of the instrument must be calibrated at several locations on the uncoated substrate sample with similar roughness, or the coating must be dissolved after removing the coating with a solution that is not corrosive to the substrate metal. Zero point
The strong magnetic field generated by various electrical equipment around will seriously interfere with magnetic thickness measurement;
The probe deforms the soft-coating test pieces, so reliable data cannot be measured on these test pieces;
Adhesives that interfere with the probe's close contact with the surface of the coating must be removed. During the measurement, the pressure must be kept constant and the probe should be kept perpendicular to the surface of the test specimen in order to achieve accurate measurements.
The magnetic method measures the thickness affected by the metallic change of the substrate (in practical applications, the change in magnetic properties of mild steel can be considered minor). To avoid the effects of heat treatment and cold working, the same properties as the base metal of the specimen should be used. Standard tablets calibrate the instrument;
The conductivity of the base metal has an influence on the measurement, while the conductivity of the base metal is related to its material composition and heat treatment method. The instrument should be calibrated using a standard sheet that has the same properties as the base metal of the test piece.
Asphalt mixing plant is one of the key equipment for road construction. It is mainly used in the production of asphalt mixture for paving road surfaces. Asphalt mixing plant consists of a number of parts, including dosing system, dryer, agitator, dust removal system, fuel system and so on.
The batching system is one of the core parts of Asphalt mixing plant. It is responsible for adding various raw materials to the blender in a certain proportion. These raw materials include asphalt, sand, gravel and other additives. The batching system usually consists of a weighing sensor, a batching bucket and a batching transfer device.
The dryer is another important part of the Asphalt mixing plant. It is mainly used for drying raw materials such as sand and stones. There are heating elements and rotating agitators inside the dryer, which can make the raw materials fully heated and mixed evenly.
Mixer is one of the core parts of Asphalt mixing station. It is responsible for mixing various raw materials together to produce a high quality asphalt mixture. The agitator usually consists of multiple mixing blades, which can fully mix the raw materials to ensure the stable quality of the asphalt mixture produced.
Dust removal system is one of the important components of Asphalt mixing plant. It is mainly used to collect dust and exhaust gases generated during the production process. The dust removal system is usually composed of multiple filters, which can effectively filter out dust and exhaust gas to ensure a clean working environment and air quality.
Fuel system is one of the key parts of Asphalt mixing plant. It is responsible for providing the fuel to power the Asphalt mixing plant. The fuel system usually consists of a fuel pump, a fuel filter and a fuel injector.
Asphalt mixing plant is a kind of high efficiency asphalt mixture production equipment, widely used in road construction field. It has the advantages of high automation, high production efficiency, stable product quality and so on, and provides a strong support and guarantee for road construction.
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