Due to widely use, high demand and many varieties, aluminum powder is a large class of metal pigments. Paint aluminum powder particles are scaly. Because of these scaly particles, aluminum powder has metallic luster and shielding function.
Aluminum with a silver-white metallic luster, so commonly known as aluminum silver or silver, its chemical composition is implemented as aluminum is not silver. Range of applications: silicon powder coatings, printing ink, plastic masterbatch, printing, imitation gold paper, imitation gold, gold film, textiles, but in water-based paint and with the acid-base paint will oxidize black. Not recommended for applications requiring the occasion of acid rain.
The powder coating is much lower security risk than ordinary paint, and solvent air mixture, the powder air mixture caused by the ignition energy is 50-100 times. However, all flammable powder or dust and air form an explosive mixture is a potential source of danger. However, prior to take appropriate measures to secure transportation, storage and processing. For security reasons, aluminum powder concentration can not exceed 10g/m3. In the spray zone, often more than this concentration. Because there is always sufficient oxygen content, so you must avoid causing more than the minimum energy spark.
Compared with the resin powder does not contain pigments, when 5-6% of aluminum powder, the powder constant (explosive metrics) and the maximum explosion pressure to increase 10 percent. Al content continues to increase the explosive power will increase. When the aluminum content greater than 25%, will reach the explosive power of the pure metal powder. However, the dependencies of this aluminum powder pigment are not made for minimum caused by the combustion energy. Regardless of what kind of scattered, pure resin powder are lower than the minimum trigger combustion energy. If the aluminum pigment content> 10% and use of small particle size and without coated aluminum processing, lowest trigger combustion energy can be reduced.
Containing aluminum powder coatings, powder coatings containing pigment with ordinary, they do not exceed the prescribed limit, there is no fire and explosion hazard. In order to ensure the safety of the spraying process, the need to avoid the accumulation and concentration in the separation of metal powder supplier. These basic requirements also apply to solvent-based paints containing copper powder. Directly caused by the copper-zinc alloy powder explosion hazard than aluminum.
The most important part for the powder equipment is the good grounding between the components and operations staffs. Indoor dust concentrations should be controlled at the lowest level, according to local provisions of the exhaust system. Under any circumstances, the fire, spark and overheating should be avoided.
Source:http://www.mhcmp.com
The application of tungsten in various industries
Steel Industry Most of tungsten applied in the production of special steels. The widely used high-speed steel was containing 9-24% of tungsten, 3.8-4.6% of chromium, 1-5% of vanadium, 4-7% of cobalt, 0.7-1.5% of carbon.
Magic effects of coconut oil
According to records, coconut oil can be regarded as the nobility of skin care plant extracts. It was rich in exotic tension of tropical plants, which can enhance the contractile force of the pores, perfectly beautify and nourish the skin.
Exploring the Potentials of Nano-Aluminum Powder
Nano-aluminum powder, a material with remarkable properties due to its minuscule particle size, is revolutionizing various industries with its high reactivity and large specific surface area. Unlike its bulk counterpart, nano-aluminum powder begins to oxidize at a lower temperature of 550°C, compared to the 950°C oxidation point of ordinary aluminum. This lower ignition energy and full combustion without apparent cohesion make it a superior choice for applications requiring high energy and efficiency. The unique characteristics of nano-aluminum powder, such as faster burning rates and greater heat release, are largely influenced by its synthesis method, which determines its particle size, surface area, and shape.
