How does powder coating work?
Powder coating is used in the manufacture of metal products and fabrication. Powder coating is based on the principle that objects with opposite electric charges attract one another. Particles are negatively charged by passing through a special spraying gun. This results in an electric field between the spray gun and the earthed product. The powder particle then follows the field line and adheres to the product. The component is then baked at between 160 – 200 degrees centigrade for approximately 20 minutes. Complex metal components can be powder coated with excellent adhesion results. The heat of the oven causes a chemical reaction to occur and the powder to cure creating a highly durable finish, the thickness of the finish is approximately 70 microns. Powder coating resists cracking, and peeling and is extremely abrasive, corrosion and chemical resistant.
Our Healthcare range of pedal bins are powder coated using powder with an antimicrobial additive. This additive called SteriTouch is mixed with the powder and applied to the pedal bins during the painting process. This additive has been tested for use in preventing the spreads of MRSA and E.Coli related bugs.
Powder Coating Quality Control
Taltech Engineering sheet metal work uses quality powders supplied by recognized manufacturers and process metal components through a modern paint system. Different types of powders are used depending on whether the product is used indoors or outdoors . Regular quality checks are made along with stringent spot checks which are carried out by qualified staff.
Regular quality checks:
Gloss Level: This ensures that the components are stoved correctly to specification.
Thickness Test: This ensures that there is sufficient powder applied to meet the protect requirements.
Visual Check: Visual checks to make sure components are free from contamination and the finish is even.
Adhesion Check: This destructive test is carried on sample plates which are processed with each batch to determine that the powder has adhered to the product properly.
Taltech Engineering sub contract sheet metal work puts quality at the core of its business activities and is accredited to the ISO9001 quality standard. In order to to continually meet the requirements of ISO 9001. We operate a fully documented quality procedures that are monitored to ensure we give the best possible service to our customers.
Our dedicated quality team undertakes all aspects of quality assurance and inspection utilizing both traditional and state of the art measuring equipment. Shop floor inspection is the responsibility of all operators and is carried out in line with the appropriate plans.
Powder coating is an extremely popular means of painting your parts with a variety of colors and finishes available. It provides a number of benefits over traditional painting methods which can enhance the value and viability of the finish in a wide range of applications. From the cost of coating to the durability and environmental impact, powder is a very effective way to provide a high quality finish on your parts.
Why Powder Coating
- Efficiency: Thanks to the electromagnetic charge used to hold the powder to the part, there is very little waste created in the process. In addition, your coating professional can spray as much or as little powder as needed in a single application. Rather than waiting for each coat to dry before applying the next, this is all done in a single step, and will still cure evenly. This saves time and money in operating costs.
- Cost Effective: In addition to the money saved by eliminating extra drying time and steps, powder coating is cost friendly in other ways as well. The raw materials used in the process are purchased specific to the size and specifications of the job at hand. The powder itself is less expensive than wet paint from the beginning, and can be stored in a way that takes up less real estate than paint cans.
- Durability: In terms of the finish itself, powder coating is known for being far more durable than other paint options. During the curing process the powder melts and forms long chemical chains as it gels together. As a result, the finish is more flexible than traditional paint, and allows for a small amount of bending and flexing as your parts vibrate and move. It is also resistant to scratching, flaking, and corrosion.
- Variety: While there are some common colors and finishes used in powder coating, one of the best assets of this method is the ability to completely customize your color and finish. The manufacturer will create a one of a kind powder blend that matches any color, with the option to add texture like wrinkles or glitter, and a huge range of finishes from high gloss all the way down to matte. Few other paint options can compete with this range and versatility.
- Environmentally Safe :Since the powder used in powder coating it free of solvents and other chemicals, it is generally recognized as safe for use and for disposal. The process releases no known harmful chemicals into the atmosphere, and produces less overall waste throughout spraying. However, painters know not to inhale the powder and to wear protective gear to prevent skin contact.
- Overall Quality :Both the application and curing process used in powder coating create a quality finish that is unlike any other paint on the market. Since the powder melts and flows together, it creates an even surface across the entire unit. In addition, it is not subject to unevenness, running or dripping, which are common among wet paints. As a result, it doesn’t require sanding or refinishing if a mistake is made.
- Maintenance: Lastly, powder coating is extremely easy to maintain long term. No special cleaners or solvents are needed to keep it clean. Instead, it can be wiped down with regular, soapy water and rinsed off. Since the coating is so resistant to scratching and corrosion, you won’t have to worry about rust or other damage during cleaning. For most applications, wiping your parts clean a few times a year is enough to keep them healthy for many years to come.
It is easy to see how powder coating outperforms traditional paint options in a variety of areas. With the right equipment in place, it can cut down on finishing time, increase the quality of your finish, and open up a broader range of finishing options. It also allows you to store and dispose of materials in a more cost effective and environmentally responsible manner. Your customers will appreciate a finish that is wear and weather resistant, but also easy to maintain.
Taltech Engineering’s goal is to deliver a world class service to all its customers through developing long term partnerships. This enables Taltech Engineering to fully understand customer requirements and ensure that the overall service meets specific customer needs.
Can steel be powder coated?
In short, yes it can.
Some metals that can be powder coated:
and there are a few others. Keep in mind the metal must have the ability to hold a charge and withstand heat. We recommend contacting us for more info on other metals.
Is powder coated steel rust proof?
Yes, powder coated metal cannot rust because it has been oxidized during the powder coating process. Metal painted with a powder coating (e.g. steel) is highly resistant to rust, preventing unsightly rust patches and red streaks on outdoor surfaces such as patios or facades of buildings. If damaged, however, small cracks can form in the paint for moisture to seep into and rust to form.
Is powder coated steel waterproof?
Provided there is no damage or cracks then yes it is waterproof
Does powder coated steel scratch?
Powder coating may be a solid, protective coating for metal surfaces. However, as with any surface, it’s vulnerable to damage including scratches
There are several ways powder coating powder coatings can develop surface scratches. The first is actually caused by the powder itself. Powder particles can scratch powder coatings, especially if not properly filtered prior to application or if there are more than a few large particles in the powder mixture.
How does powder coat stick to metal?
The powder that is applied in powder coating sticks to a metal surface due to the powder’s rough surface. As powder is incorporated into the powder coat, it lies over imperfections in the metal itself and provides an almost flawless bonding surface.
What surfaces can be powder coated?
Surfaces that are commonly powder coated include: steel, copper, aluminum, zinc and magnesium. Additional more expensive metals such as titanium or nickel alloys may also be powder coated for various applications. In addition to these metals being able to withstand powder coating techniques, certain plastics can also withstand powder coatings as well (such as polyethylene).
How long does it take to powder coat something?
In order for a piece of metal with a thickness of a few millimeters to powder coat, it can take up to 1 hour. Larger pieces with thicker metal may need longer powder coating time as powder coating thickness is also dependent upon the powder that is used for applying the powder coating paint process.
How long will powder coated paint last?
Metal that has been powder coated can last for years. However it’s longevity depends on the environment that it’s in. For example a powder coated metal sign in a car park may last longer than powder coated metal signs that are used outdoors.
Can galvanized sheet metal be powder coated?
Yes powder coatings can be applied successfully to hot dip galvanized surfaces using powder coatings that contain Zinc Chromate.
Can an Aluminium sheet be powder coated?
Yes absolutely it can