Powder coating as the name suggests is a kind of coating that is applied as a free-flowing powder in dry form. Unlike traditional liquid paints that need a solvent medium to keep them in liquid suspension form, this coating does not need a solvent. The filler and binder parts of the coating remain in dry form. When in need of service companies that specialize in powder coat Los Angeles is the best place to check out.
The powder is applied using electrostatic means before heat is used to cure it into place. When curing is done, the coating flows freely and forms an application that is skin-like over the surface. The resultant coating is often tougher compared to the one that conventional paints form. These coatings exist in two major kinds, that is, thermoplastic and thermoset polymer.
Because of a lack of a liquid carrier, thicker applications can be achieved easily. The applications can be very thick and they do not run or sag. One can apply the coating horizontally or vertically with very little difference between the two applications. The lack of difference between the two kinds of applications makes it hard to tell regions that are applied horizontally from the ones that are applied vertically.
Powder coating has a very low level of emission of volatile organic compounds. The low level of VOCs is as a result of lack of a carrier fluid that evaporates. As such, the coating is healthier and environmentally friendly. When using this coating, it is possible to apply several powder colors that can then be cured together at once. This ability allows for special effects and color blending to be achieved within one layer.
In most cases, powder coatings come in particle sizes that range between 30 and 50 microns. The typical softening and melting temperatures are 80 and 150 degrees Celsius respectively. Curing is usually done at a temperature of 200 degrees Celsius. For the best results, the curing is done for between 10 and 15 minutes. The period of curing varies depending on the thickness of the application.
The actual powder coating is only done after adequate preparation of the surface. The intention of surface preparation is to remove unwanted materials from the surface. Some of the materials removed include dust, dirt, oil, lubrication greases, metal oxides, and welding scales. The preparation may be done using both chemical and mechanical methods. Which method is used for preparing the surface is usually determined by the size of the substrate and the material it is made out of.
Chemical treatment often entails submerging or spraying the object or surface with phosphates or chromates. Chemical pre-treatments are performed in multiple phases that entail etching, de-smutting, and degreasing. It takes several rinses to chromate or phosphate a substrate. Pre-treating a substrate has two main objectives. The first objective is to clean and the second objective is to enhance the bonding ability between the surface and the coating.
Chromates have been discovered to be toxic and unfriendly to the environment. As such, other methods of pre-treatment have been invented to solve the problem. Alternative materials that are now being used in the place of chromates are zirconium, titanium, and silanes. These alternative materials are as effective as chromates and very friendly to the environment.
The powder is applied using electrostatic means before heat is used to cure it into place. When curing is done, the coating flows freely and forms an application that is skin-like over the surface. The resultant coating is often tougher compared to the one that conventional paints form. These coatings exist in two major kinds, that is, thermoplastic and thermoset polymer.
Because of a lack of a liquid carrier, thicker applications can be achieved easily. The applications can be very thick and they do not run or sag. One can apply the coating horizontally or vertically with very little difference between the two applications. The lack of difference between the two kinds of applications makes it hard to tell regions that are applied horizontally from the ones that are applied vertically.
Powder coating has a very low level of emission of volatile organic compounds. The low level of VOCs is as a result of lack of a carrier fluid that evaporates. As such, the coating is healthier and environmentally friendly. When using this coating, it is possible to apply several powder colors that can then be cured together at once. This ability allows for special effects and color blending to be achieved within one layer.
In most cases, powder coatings come in particle sizes that range between 30 and 50 microns. The typical softening and melting temperatures are 80 and 150 degrees Celsius respectively. Curing is usually done at a temperature of 200 degrees Celsius. For the best results, the curing is done for between 10 and 15 minutes. The period of curing varies depending on the thickness of the application.
The actual powder coating is only done after adequate preparation of the surface. The intention of surface preparation is to remove unwanted materials from the surface. Some of the materials removed include dust, dirt, oil, lubrication greases, metal oxides, and welding scales. The preparation may be done using both chemical and mechanical methods. Which method is used for preparing the surface is usually determined by the size of the substrate and the material it is made out of.
Chemical treatment often entails submerging or spraying the object or surface with phosphates or chromates. Chemical pre-treatments are performed in multiple phases that entail etching, de-smutting, and degreasing. It takes several rinses to chromate or phosphate a substrate. Pre-treating a substrate has two main objectives. The first objective is to clean and the second objective is to enhance the bonding ability between the surface and the coating.
Chromates have been discovered to be toxic and unfriendly to the environment. As such, other methods of pre-treatment have been invented to solve the problem. Alternative materials that are now being used in the place of chromates are zirconium, titanium, and silanes. These alternative materials are as effective as chromates and very friendly to the environment.
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