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VOCs or HAPs per weight of solids
The older regulations were concerned with VOCs,while the newer ones have been written with the focus on HAPs.The calculation methods are very similar. The description below is written in terms of VOCs,but the formulas apply if everything applying to VOC solvents below is taken simply to apply to HAP solvents. Another way to handle the presence of non-VOCs is to calculate the ratio of the weight of the VOC solvents to the weight of the solids, rather than to theRead More …
Conveyorized Systems for powder coating application
Before considering the design and implementation of a conveyorized powder coating system, a few questions need to be answered. Proper design begins with preparation and research. Where will the system be built? Location is essential for efficient transportation of products to and from the powder coating powder facili ty. What is the available floor space? As you begin designing the powder application system, it’s important to have a clear understanding of the facilities floor space and the location of eachRead More …
What is the strength of powder coatings
Strength Powder Coatings generally have poor strength, ductility and impact properties. These properties tend to be dictated by the “weakest link in the chain” which in coatings tends to be the particle or grain boundaries and coating/substrate interface. Coatings are limited to the load they can carry, and thus require a substrate for support, even then, coatings are poor when point loaded. Internal tensile coating stresses generally adversely effect properties. Effective bond strength is reduced and can be destroyed byRead More …
Mechanisms of corrosion protection inferred by Anodic Coatings fall into two classes
Anodic Coatings Anodic coatings for the protection of iron and steel substrates are almost entirely limited to zinc and aluminium coatings or their alloys. Where coatings anodic to the substrate are applied, the corrosion protection is referred to as cathodic protection or sacrificial protection. The substrate is made to be the cathode and the coating the sacrificial corroding anode. The mechanisms of corrosion protection inferred by these coatings fall into two classes: Cathodic or sacrificial protection A barrier to theRead More …
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 …
D5 Creation