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How to prevent corrosion for substrate
Protecting Metals from Corrosion Ideally, a material which is inherently resistant to its service environment, meets with the mechanical, formability and economic requirements would be the first choice for selection. Unfortunately, this is not often the case. Many materials will need a method of corrosion control and there are three main approaches: Modification of the environment to which the material is exposed Electrical methods of control Use of protective coatings Thermal Spray Coatings for Corrosion Protection Thermal spray coatings areRead More …
There are a number of different abradable coating types
Abradable coatings are designed to preferentially abrade when contact is made with a mating part. Thermal spray abradable coatings have low structural integrity so they are readily abraded when they come into contact with a moving surface with higher structural integrity. The coatings are designed not to damage the mating surface. There are a number of different abradable coating types, to cater for different operating temperatures, corrosive environments and mating materials. The coating structure can be either: 1.Very porous withRead More …
Stainless steel is relatively free of the iron hydrates
Stainless steel (SS) is relatively free of the iron hydrates that are a common component on the surface of regular grades of carbon steel.SS should be cleaned to remove the surface oils and dirt from manufacturing and handling. Many stainless steel products do not have a protective coating because they are not sensitive to ordinary atmospheric conditions. The passive oxide layer on stainless steel is relatively inert to alkaline cleaners and other chemical products that are commonly used on carbonRead More …
The important element for recoating the powder coating
The most important element for recoating the powder coating and as a matter of fact, for applying a different topcoating over an applied coating is to be sure the new coating will not lift or wrinkle the old coating. Check the old applied coating with a strong lacquer thinner by wetting the surface and giving it a couple of rubs with a damp cloth. If there is no excessive softening the coating should be OK to recoat with a newRead More …
Clear Powder coating versus Liquid paint on Aluminum Wheels
Clear liquid polyurethane coatings are used quite extensively in the automotive industry. They’re primarily used as the clear coat, top coat found on most cars and are formulated to be very durable. Clear powder coating have not yet gained recognition in this area primarily due to aesthetic reasons. Clear powder coating are used quit extensively by automotive wheel manufacturers, are durable and can be very cost-effective. Powder coating application requires special electrostatic spray guns, and an oven to melt andRead More …
Pollution Prevention Alternatives for powder coating application
Powder coating application systems provide pollution prevention over traditional spray application systems due to the higher transfer efficiency (above 90%), and very low volatilization of organic solvents. Install a booth recovery system for electrostatic spraying and flocking applications. Booth recovery systems collect overspray powder particles from the exhaust air so that they may be reused. Reduce or eliminate contamination of coatings by enclosing and covering work areas. Surround systems with a semi-open structure which allows operation of the process butRead More …
Thermosetting powder coating and thermoplastic powder coating
Powder coating is a type of coating that is applied as a free-flowing, dry powder. The main difference between a conventional liquid paint and a powder coating is that the powder coating does not require a solvent to keep the binder and filler parts in a liquid suspension form. The coating is typically applied electrostatically and is then cured under heat to allow it to flow and form a “skin”.They are applied as a dry material and they contain veryRead More …
Methods are used to capture overspray during powder coating
Three basic methods are used to capture over sprayed powder coating powder:Cascade (also known as a water wash),Baffle, and Media filtration. Many modern high volume spray booths incorporate one or more of these methods of source capture in an effort to improve overall removal efficiency. One of the most common combination systems, is a cascade style booth, with multi-stage media filtration, prior to the exhaust stack, or prior to a VOC control technology like an RTO (regenerative thermal oxidizer). Anyone that looks behindRead More …
What is Manganese phosphate coating
Manganese phosphate coating has the highest hardness and superior corrosion and wear resistances of general phosphate coatings. Manganese phosphating is extensively employed to improve the sliding properties of engine, gear, and power transmission systems. The use of manganese phosphated coatings for improved corrosion resistance can be found in virtually all branches of the metal working-industry. Typical examples mentioned here include motor vehicle components in brake and clutch assemblies, engine components, leaf or coil springs, drill bits, screws, nuts and bolts,Read More …
Chromate coating for aluminium surface
Aluminium and aluminium alloys are treated by a corrosion resistant conversion coating that is called “chromate coating” or “chromating”. General method is to clean the aluminium surface and then apply an acidic chromium composition on that clean surface. Chromium conversion coatings are highly corrosion resistant and provide excellent retention of subsequent coatings. Different type of subsequent coatings can be applied to the chromate conversion coating to produce an acceptable surface. What we call as phosphating to steel an iron isRead More …
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