ã€China Aluminum Industry Network】In anodizing, operate under normal process conditions to avoid operating at excessively high current densities and high temperatures, otherwise aluminum ions may accumulate.
The technology and performance of DC Axial Fans have fully reached a mature stage,
and new technologies are constantly emerging. The size of the fan is from 8mm to 280mm, the voltage is 5V, 12V, 24V, 48V, 110V, 220V, 380V, with a square, round, olive shape, etc.The
working principle of the DC fan is realized according to the energy conversion, that is,
electric energy, electromagnetic energy, mechanical energy and kinetic energy. Its circuit principle is generally divided into various forms, the use of different circuits, the performance of the fan will be different.
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In simple terms, by changing the input to the brushless motor stator coil of the alternating current wave frequency and waveform, the formation of a geometric axis to the motor winding coil in magnetic field around the magnetic field of permanent magnet on the rotor rotation, the motor will turn up, the quantity, performance and magnet motor magnetic flux the motor input voltage strength, size and other factors, it has a great relationship with the control performance of the brushless motor, because the input DC current to the electronic governor, into 3 alternating current, also need to receive a control signal from the remote control receiver, control motor speed, in order to meet the need to use model. In general, the structure of the brushless motor is quite simple, really decided its performance or brushless electronic governor, electronic governor to a good overall control a single-chip control program design, circuit design, complex processing process, so the price is much higher than the brush motor.
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DC Axial Fans Dc Axial Fans,Dc Axial Cooling Fan,Axial Brushless Dc Fan,Cooling Wall Dc Axial Fans Shenzhen Fusheng Motor Co.,Ltd , http://www.fushengfan.com
In order to avoid the newly formulated anodizing solution from affecting the quality of the obtained film due to absence of aluminum ions, it is better to adopt partial replacement when it is normally replaced, such as leaving a l/3 or 1/4, so that the solution after replacement is still appropriate Concentrations of aluminum ions exist. If the original solution is completely replaced due to contamination, the following method may be used to provide a certain amount of aluminum ions.
(1) power treatment. Before the temperature of the newly prepared solution has not dropped to the working temperature, anodizing is carried out using scrap aluminum pieces or scraps. The dissolution rate of aluminum is high at high temperatures, and the requirement can be satisfied after 3 to 4 hours.
(2) Add aluminum powder. Adding aluminum powder 2~3g/L when preparing the solution can also meet the requirements.
How to control the concentration of aluminum ions