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Zinc phosphate and its applications
Generally zinc phosphate conversion coating is used to provide long lasting corrosion protection. Almost all automotive industries use this type of conversion coating. It is suitable for the products come against hard weather conditions. Coating quality is better than iron phosphate coating. It forms 2 – 5 gr/m² coating on the metal surface when used as under paint. Application, set up and control of this process are more difficult than other methods and can be applied by immersion or spray.Read More …
What is Zinc Phosphate Coatings
Zinc phosphate coating is preffered in case of requirement of higher corrosion resistance than iron phosphate. It can be used as base for paintings (especially for thermosetting powder coating), before cold drawing / cold forming of steel and prior application of protective oil / lubrication. This is often the method chosen when long life under corrosive conditions is required. Coating is also very good with zinc phosphate because the crystals form a porous surface which can soak up and mechanicallyRead More …
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 …
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