Metalizing is a general term used to refer to the process of applying metallic substance on surfaces that are not metallic. The first instance of this process was witnessed in 1835 when Justus Von coated a glass surface with metallic silver. This made glass one of the earliest materials to be metalized. The introduction of ABS plastic led to rapid growth of this process along with new remarkable improvements up to where the technology is today.
Since substrates used are usually non-conductors, this process involves changing them into conductors first before they are plated. If the substrate is plastic in nature, chemical etching is performed through an appropriate process. Among the most appropriate processes used in etching plastic is to have it dipped into a hot mixture of sulfuric and chromic acid. The surface needs sensitizing and activating after etching. In Los Angeles metalizing is very refined particularly with the invention of vacuum metalizing.
Vacuum metalizing involves evaporating a metal material inside a vacuum chamber hence the name. The fumes of evaporated metal then settle down on the substrate to be coated forming a very uniform metalized surface. This process is also called thermal evaporation and aluminum is the most commonly used metal. Thermal evaporation falls under a group of methods known as physical vapor deposition, PVD.
So as to vaporize the metals utilized for thermal evaporation, a continuous supply of heat is necessary. Therefore exists several heating methods that could be employed to supply the heat. Among the techniques are resistance heating, electron beam, and plasma. Aluminium is the most utilized metal and the process takes place inside a vacuum metallizer, which is evacuated to around 0.0005mbar.
The aluminum wire gets fed into the system through individual inter-metallic evaporators. Most metallizers are resistance heated. The aluminum melts and evaporates in a matter of seconds after being fed into the evaporators. The substrate is supported on chilled process drum and is passed over the evaporation source at variable speeds. Typical speed is 1000 meters per minute. That speed allows for a thin well spread coat to form on the substrate.
Metalizing process has many applications and benefits in the current world. The first advantage is that it raises the aesthetic value of the object it is applied on to a great extend. Several color shades can be integrated into the activity to make end products appear very attractive. The process may also be employed to produce substrates that regulate light reflection and/or transmission, conduct power, and save power.
Theft and counterfeiting can also be fought through substrates and items produced using this process. The coat produced through deposition of thick layers of condensing metal vapor can serve as vapor barriers and heat shield. Most of the mirrors used in some of the most famous telescopes such as Hale telescope were produced using thermal evaporation.
Metalizing as an industrial process presents some disadvantages to people who do it. For instance, fumes generated from the process are highly dangerous to lungs when inhaled in huge amounts. The level of heat involved also presents a threat to the machine operator. This necessitates use of necessary safety gear and following of all safety rules.
Since substrates used are usually non-conductors, this process involves changing them into conductors first before they are plated. If the substrate is plastic in nature, chemical etching is performed through an appropriate process. Among the most appropriate processes used in etching plastic is to have it dipped into a hot mixture of sulfuric and chromic acid. The surface needs sensitizing and activating after etching. In Los Angeles metalizing is very refined particularly with the invention of vacuum metalizing.
Vacuum metalizing involves evaporating a metal material inside a vacuum chamber hence the name. The fumes of evaporated metal then settle down on the substrate to be coated forming a very uniform metalized surface. This process is also called thermal evaporation and aluminum is the most commonly used metal. Thermal evaporation falls under a group of methods known as physical vapor deposition, PVD.
So as to vaporize the metals utilized for thermal evaporation, a continuous supply of heat is necessary. Therefore exists several heating methods that could be employed to supply the heat. Among the techniques are resistance heating, electron beam, and plasma. Aluminium is the most utilized metal and the process takes place inside a vacuum metallizer, which is evacuated to around 0.0005mbar.
The aluminum wire gets fed into the system through individual inter-metallic evaporators. Most metallizers are resistance heated. The aluminum melts and evaporates in a matter of seconds after being fed into the evaporators. The substrate is supported on chilled process drum and is passed over the evaporation source at variable speeds. Typical speed is 1000 meters per minute. That speed allows for a thin well spread coat to form on the substrate.
Metalizing process has many applications and benefits in the current world. The first advantage is that it raises the aesthetic value of the object it is applied on to a great extend. Several color shades can be integrated into the activity to make end products appear very attractive. The process may also be employed to produce substrates that regulate light reflection and/or transmission, conduct power, and save power.
Theft and counterfeiting can also be fought through substrates and items produced using this process. The coat produced through deposition of thick layers of condensing metal vapor can serve as vapor barriers and heat shield. Most of the mirrors used in some of the most famous telescopes such as Hale telescope were produced using thermal evaporation.
Metalizing as an industrial process presents some disadvantages to people who do it. For instance, fumes generated from the process are highly dangerous to lungs when inhaled in huge amounts. The level of heat involved also presents a threat to the machine operator. This necessitates use of necessary safety gear and following of all safety rules.
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