What is Powder Coating?

Powder Coating uses very fine dry particles of resin with the pigment color of your choice. The resin powder is applied with a spray gun similar in concept to applying solvent-based paint. The difference is this spray gun and it's resin contents are electrostatically charged. When the resin powder is sprayed onto a part it sticks to the metal because it's grounded, attracting charged resin powder like a magnet.

Why use Powder Coating?

In the past companies used solvent based chemical sprays or dips to coat parts, most of the spray, was to waste. The solvents became airborne and needed special filtering to control. Powder Coating is a clean alternative, less waste, greater ease of use within manufacturing, better quality and superior coverage. Powder Coating is an environmentally friendly replacement to wet spray applications.

What application uses Powder Coating?

Powder Coating is found everywhere, interior, exterior, high visibility or even low visibility areas with high protective requirements. Powder Coating is used on automotives exteriors and interiors, on appliances, home décor products, even toys; because of its versatility Powder Coating has many possibilities.

We can handle Nylon, Polyester, Polyurethane and Epoxy in a variety of clear coats and colors. MTD is known for its Class Surface finishes. High quality with high durability makes MTD your best choice.

MTD can handle sizes up to 84” long by 16” Wide by 60.5” High with a maximum load of 60 pounds per hook Our automated Nordson paint line allows us unique control along with consistency part to part. 

Process Control:

MTD's Coating line consists of a three stage Iron phosphate pretreatment process, followed by a gas fire dry off oven, then into our Nordson automated 6-gun oscillating paint system and onto our cure oven. Our process is totally automated, conveyors carry the product through all operations, giving our customers consistent quality. Each stage is carefully monitored and statistically controlled.

Pre-Treatment

Iron Phosphate:

Iron phosphate pre-treatment is the most commonly used conversion coating for powder coating. When the metal comes in contact with the acidic phosphatizing solution, pickling occurs, this results in a reduction of acid concentration at the liquid/metal interface. Iron is dissolved, hydrogen is evolved, and the phosphate coating is deposited. A phosphate coating retards the amount of corrosion creep or spread because the nonconductive coating insulates the active anode and cathode centers, thus substantially decelerating under-film corrosion. Iron phosphate is ideally suited for ferrous metals, but can be modified chemically for mixed metal application, such as aluminum, zinc and galvanized substrate materials.

The MTD Pre-wash: (Spray wand system)

• Stage One: Iron Phosphate
• Stage Two: City Water Rinse
• Stage Three: City Water Clean (Sealant introduced as necessary)
• Stage Four: City Water Cleaning (Tap)

Along with excellent adhesive properties iron phosphate is environmentally friendly after treatment the used by-product can be poured right down the drain, no sludge no effect to the environment.