Powder coating is the simple technique of applying dry paint to a part such as metal or plastic, and after the final coating is the same as a finished 2-coat wet paint job. Powder coating can be applied in two ways; either by lowering an item into a bed of powder which may or may not be electrically charged, or the powder paint is electrically charged and sprayed onto the part. After being coating with dry paint, the part is placed in an oven and the powder particles melt and combine to form a permanent layer of paint.
There are two main types of powder available to use, either the thermoplastic powder which re-melt when heated, and thermosetting powders that will not re-melt when heated. This is because during the initial heating process a chemical cross-linking reaction is triggered so that the bonds cannot be broken.
The foundation of any high-quality coating job is preparation. Most powder coating failures are linked to a poor preparation process. It is important to know that the preparation treatment is different for different materials.
For all applications the preparation treatment for aluminum is to clean, rinse, etch, chromate, rinse and denim rinse. Oils and greases can be removed by weak alkali or neutral detergent solutions and the surface is etched to remove heavy oxides. After rinsing, the aluminum is dipped into a chromate or phosphate solution to form a adaptation coating. After rinsing the aluminum it is rinsed in de-mineralized water which gets rid of chemical salts on the aluminums surface. This process has two functions which include giving the aluminum a surface which is better for adhesion and protects the aluminum from under the paint corrosion.
If you are preparing a steel part, the steps you take to prepare your part are as follows: clean, rinse, etch, rinse, grain refine, zinc phosphate, rinse and acidulated rinse. The grain refiner is used after acid cleaning of steel surfaces and before zinc phosphate, because otherwise the zinc phosphate coatings produced will be very coarse and have a low adhesion ability. The etch is required to remove the zinc corrosion products which begin to form almost immediately the zinc is removed from the galvanizing kettle. The grain refiner ensures a fine phosphate is produced.
How To Powder Coating
What do you exactly do when you want to enhance the appearance of a particular object? One of the easiest will be to give it the best finish that you can possibly come up with. The usual process is painting; however, it doesn't only take a lot of time, but it can also be negatively affecting our environment.
Fortunately, an alternative method is gaining popularity these days. Called industrial powder coatings, the concept is very simple. It makes use of a powder that is actually a combination of resin and pigment. Both are grounded to come up with very fine particles. These particles are then submitted to electrostatic charges, heated, and, when melted, is applied as industrial powder coatings to almost anything. A number of East Coast powder coating is now being used in fences, posts, structural steels, gates, and almost any other type of surface that may need smoother, cleaner, and definitely way better finish.
What You Can Obtain from Industrial Powder Coatings
1. It is very friendly to the environment. The East Coast powder coating, for example, doesn't contain any volatile organic compounds, which can definitely damage the environment, especially the ozone layer. This means that you can contribute to the fight against global warming. What's more, whatever is left, or what is known as overspray, of these industrial powder coatings can still be reused, reducing your waste to as much as 99 percent.
2. You can come up with plenty of combinations. You are basically limitless when it comes to color choices and even combinations for your East Coast powder coating. This is because manufacturers can already control the characteristics of the resins, perhaps making them appear glossier when already sprayed into the surface.
3. It dries up fast. On the average, the industrial powder coatings can stick into the surface as if it's already part of it as fast as 30 seconds. You can just imagine how many you can probably work on in a given day.
4. They are very durable. Because of the technology used, the East Coast powder coating can stick better and longer into the surface. If you're just going to have the job done right, you're sure that the object will be able to retain its shine or glossiness for more than 20 years.
5. You can minimize the exposure to hazardous chemicals. With industrial powder coatings, there is no need for you to deal with solvents and other chemicals, which can be dangerous to a person's health, especially if he or she has been exposed to them for such a long time.
6. You can easily automate the procedure. This type of finishing application is also compatible with certain tools such as your automated gun movers to make the work a lot faster and more efficient.
7. It's cheaper for both the consumer and the contractor. There's actually no need for you to have a second coating into your objects, since the first one will already suffice. Thus, both the consumer and the contractor will be able to save money on industrial powder coatings.
Both Barney Garcia & Irina M are contributors for EditorialToday. The above articles have been edited for relevancy and timeliness. All write-ups, reviews, tips and guides published by EditorialToday.com and its partners or affiliates are for informational purposes only. They should not be used for any legal or any other type of advice. We do not endorse any author, contributor, writer or article posted by our team.
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