June, 2012
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What is Phosphate coatings
Phosphate coatings are used to increase corrosion resistance and improve powder paint adhesion,and are used on steel parts for corrosion resistance, lubricity, or as a foundation for subsequent coatings or painting.It serves as a conversion coating in which a dilute solution of phosphoric acid and phosphate salts is applied via spraying or immersion and chemically reacts with the surface of the part being coated to form a layer of insoluble, crystalline phosphates.Phosphate conversion coatings can also be used on aluminium,Read More …
How to choose a suitable blast media for abrasive blasting
In selecting a specific media it is helpful to understand some of the materials used and how they compare. Blast media can be made of natural material such as silica, sand, mineral sand, flint, garnet, zircon, and other mineral products. It can be made of some natural byproducts such as walnut shell or corncob. And it can be manufactured of a variety of metal and non-metal compositions such as steel, iron, aluminum oxide, silicon carbide, plastic, wheat starch, and glassRead More …
Abrasive blasting is most often used for preparation of metal surfaces
Abrasive blasting is most often used for preparation of metal surfaces of heavy structural parts, particularly HRS weldments. It is a very good way of removing the encrustations and carbonized oils that are characteristic of this type of product. Blasting operations can be manual or automated and they can be installed as part of a conveyorized powder coating system or as a batch process.The blasting device may be a nozzle type or a centrifugal wheel type. As previously stated, nozzleRead More …
Fluid Bed Powder Coating Application Process
Fluid bed powder coating consists of immersing a hot part into a bed of powder, allowing the powder to melt on the part and build a film, and subsequently providing enough time and heat for this film to flow into a continuous coating. The part should be immersed in the fluidized bed as quickly as possible after removing it from the preheat oven to keep heat loss at a minimum. A time cycle should be established to keep this timeRead More …
What are common fluidized bed powder coating process parameters?
There are no common parameters in the process of fluidized bed powder coating since it changes dramatically with part thickness. Two-inch thick bar stock can be coated with functionalized polyethylene by preheating to 250°F, dip coated and will most likely flow out without any post heating. Conversely, thin expanded metal may have to be preheated to 450°F to achieve the desired coating thickness, and then post heated at 350°F for four minutes to complete the flow out. We have neverRead More …
Is fluidized bed powder coating a good fit for your products?
There are several questions that need to be asked. First, since fluidized bed powder coating generally applies a thicker coating, can the end part withstand the dimensional changes? Unlike electrostatic coating, fluid bed coating will generally smooth over any small details in the parts, such as embossed serial numbers, metal imperfections, etc. This can be extremely beneficial for parts where Faraday Cage effects are problematic. Welded wire products are good examples. Electrostatic spray has a hard time getting into theRead More …
Brief introduction of fluidized bed powder coating
The fluidized bed powder coating system has three main sections. A top powder hopper where the powder is held, a porous plate which allows air to pass through, and a sealed bottom air chamber. When pressurized air is blown into the air chamber it passes through the plate and causes the powder to float or “fluidize”. This allows the metal part to be coated to be moved through the powder with little resistance. Fluidized bed application is accomplished by preheatingRead More …
Acrylic hybrids combine the acrylic resin with an epoxy binder.
They are somewhat better than a epoxy-polyester / hybrid but still not considered acceptable for outdoor use. The mechanical properties that are characteristic in epoxies are a benefit of these materials and they have much better flexibility than other acrylics. Because of their good appearance, tough surface, exceptional weatherability, and excellent electrostatic application characteristics, acrylics are frequently used for applications on products that have very high quality standards. Appliances, automobiles and other products that require durability and long life inRead More …
D5 Creation