The anti-corrosive coating is a coating that protects the metal surface from chemical or electrochemical corrosion of the atmosphere, seawater, and the like. Applying anti-rust coating on the metal surface can effectively avoid the direct invasion of various corrosive substances in the atmosphere, so as to maximize the metal life. Can be divided into two major categories of physical and chemical anti-rust coatings. The former relies on the proper cooperation of pigments and paints to form a dense paint film to prevent the intrusion of corrosive substances, such as iron red, aluminum powder, graphite antirust paint, etc.; the latter relies on the chemical rust inhibitor effect of anti-rust pigments, such as red Dan, zinc yellow antirust paint, etc. Used for rust prevention of metals such as bridges, ships and pipelines.
Type of anti-rust paint
1, red Dan antirust paint
This is a kind of paint mixed with red dan and dry oil. It has good permeability, good wettability, soft film and strong adhesion, but it is slow to dry. In addition, because red dan is more important, it is easy to precipitate, and it will become thicker when stored for a long time, and the brushing property is also poor.
2, iron red phenolic antirust paint
It is made of anti-embroidering pigment and long oil phenolic or lacquer paint. It should be mixed with 10-30% pine perfume when used. It has good adhesion and will not be produced by softening of topcoat. Bite the bottom.
3, iron red alkyd antirust paint
It is prepared by adding pigments such as iron, lead and chrome yellow to alkyd paint, filler, solvent and drier. Good adhesion, strong rust resistance, high hardness, elasticity, impact, and strong nitro tolerance. This kind of anti-corrosive paint is most suitable for the primer coating of the tin can industry. It is not only suitable for the general exterior paint, but also suitable for the base of nitrocellulose and amino baking varnish, especially after baking. Better performance after baking.
4, zinc yellow anti-rust paint
It is prepared by adding a zinc chrome yellow pigment to a pure phenolic paint. It has strong adhesion and high resistance to the marine environment.
5, gray anti-rust paint
It is prepared by adding lead-containing zinc oxide as the main anti-rust pigment to the varnish. It has excellent properties of rust and atmospheric corrosion resistance, but it is slower to dry. Suitable for painting outdoor steel components.
6. Transparent three-proof paint that can react with water vapor
The main film-forming substance of such a transparent lacquer is a urethane resin which, after being applied to the surface of the object to be coated, reacts with moisture in the air to form a film, and can be baked and cured to form a film. The coating film has the three-proof property of moisture proof, salt spray prevention and mildew resistance, and the transparency of the coating film is high, and the surface brightness is good after coating.
There are many types of anti-rust paints, such as barium metaborate antirust paint, zinc dust antirust paint, epoxy antirust paint, micaceous iron oxide antirust paint, and perchloroethylene antirust paint.
The vibration sensor(Vibration Transmitter) is one of the key components in the testing technology of Vibration Measurement. Its main function is to receive the mechanical quantity and convert it into a proportional electric quantity. Because it is also an electromechanical conversion device. So we sometimes call it a transducer, a vibration pickup, etc.
Commonly used vibration sensors are as follows:
1. Piezoelectric resonant
The piezoelectric sheet is used to receive the vibration signal, and the resonance frequency of the piezoelectric sheet is relatively high. In order to reduce the resonance frequency, it is realized by increasing the mass of the piezoelectric sheet vibrating body, and using a spring ball instead of an appendage to reduce the two resonance frequencies and enhance the vibration effect. Its advantages are high sensitivity and simple structure. However, the signal needs to be amplified and sent to a TTL circuit or a single-chip microcomputer circuit, but it is enough to use a triode single-stage amplification
2. mechanical vibration
In the traditional vibration detection method, after being vibrated, the spring ball vibrates at a reduced amplitude for a long time, and this vibration is easy to be detected by the detection circuit. The vibration output switch signal is determined by the output impedance and the resistance value of the matching output. According to the input impedance of the detection circuit, it can be made into a high-impedance output mode.
3. Micro Vibration Sensor
The mechanical vibration sensor is miniaturized, the vibration body is carbonized and sealed, and its working performance is more reliable. The output switching signal is directly connected with the TTL circuit and or the input circuit of the single-chip microcomputer, and the circuit structure is simple. The output impedance is high, and the quiescent working current is small.
Advantages of Vibration Sensors
1. Small size and light weight. It can be applied to some vibration test systems that are greatly affected by the additional mass.
2. It has a wider response frequency range of 4Hz-2000Hz than the magnetoelectric speed sensor, and the mechanical moving parts are not easy to damage
If you have any questions about the vibration sensor, please contact us, we will provide you with professional and timely answers.
Vibration Sensor,Accelerometer Sensor,Velocity Sensor,Accelerometer Vibration Sensor
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