Can you Overcure powder coat? (2023)

Can you apply too much powder coat?

Due to the way the electrostatics work and how the powder attracts to some areas more readily than others, it is easy to accidentally over-apply powder in the areas not suffering from the Faraday Cage effect. These areas with too much powder will suffer from back ionization and from defects like orange peel.

When a coating is baked too long or at too high of a temperature, the polymer or pigments break down causing a drop in gloss, change in color, or yellowing. It is not recommended to expose a typical powder coating above 410°F.

With thermosetting types the same or very similar chemistry is used as higher baking types; however, the curing mechanism has been greatly accelerated with the addition of a specialized catalyst. This formulation modification allows the powder to cure at sub-300°F temperatures.

The powders cure at 300°F to 400°F for 10 - 15 minutes at part temperature. The heat in the oven will cause the powder to melt and form a plastic sheet around the part.

Answer: Yes you can apply multiple coats, as long as each coat is applied to three mils thickness or less. Thicker coats can be problematic, since the product ground becomes compromised.

Put simply, the answer – most of the time – is yes. There's nothing about powder coating that makes the material fundamentally incompatible with more powder coating. You can still have the powder applied and cured to form a new coating that looks just like new, in most cases.

Unlike conventional liquid paints, which require an evaporating solvent for application, powder coating uses electrostatic application methods before being cured under high heat. Most powders require baking at around 350-400 degrees Fahrenheit for 10-20 minutes to fully cure.

The most common reason why your powder coating may chip or crack is that the edges or corners were not coated properly. Corners and edges are hard to reach and coat, and sharp metal edges may poke through the powder coating.

Sanding and buffing the powder finish can eliminate surface trash and some defects. This also helps smooth out orange peel that naturally occurs with most powder coatings on parts where the powder thickness is excessive in a particular area.

If the oven is not the correct temperature, the film starts to move. Literally, the product sags. Also, if the part itself is too hot when the powder coat is applied, sagging can happen. So, to get around this issue, the best thing you can do is keep an eye on the temperature of the substrate and oven.

What is the maximum temperature powder coating can withstand?

Traditional non-high temp powder coatings can withstand up to about 250°F and occasional spikes in temp up to about 350°F - 400°F.

Yes. The ideal temperature for powder coating most types of objects and metal surfaces is 200 degrees Celsius and above.

Finishers may use low-temperature-cure powder coatings for a variety of reasons, such as energy savings and opportunities to coat heat-sensitive substrates. Energy savings scenarios typically use powder coatings capable of curing at around 325°F (163°C) instead of a more conventional 375°F (191°C) cure.

Can you sand powder coat and recoat? this depends on the competence of the first coat. If its well adhered, to a well prepared and pretreated substrate, and provided that you are using the same type of powder, and that you sand the surface of the first coat to get intercoat adhesion. Then you should be able to recoat.

Fisheyes and Craters

A fair amount of the time, fisheyes are caused by contaminants like oil, silicone, or water; either in the powder itself, on the substrate, or contaminating both during application. Oil and silicone are particularly notorious for causing fisheyes.

Coating thickness can range from 20 to 100 microns (1 to 4 mils). The most significant challenges of UV-curing are the current cost of the powders required, as well as a need to position the UV light to ensure 100% coverage.

Since powder finishes are stronger and more durable than paint coats, powder will generally guarantee superior, longer-lasting protection to the surfaces of metal-bodied products.

Time: All paints require at least 30 minutes, even in ideal conditions.

Is there anything better than powder coating?

STEEL-IT® stainless steel based industrial coating – a top alternative to powder coating – is tougher, lasts longer, and offers superior protection against corrosion and abrasion.

Do not rub powder coated surfaces excessively, especially metallic finishes. Use only Isopropyl alcohol (IPA) or methylated spirits and rinse off with clean fresh water. It is universally recognized some sunscreens adversely affect powder coated finishes.

Generally, using fillers in powder coating that have very small particle sizes will achieve high gloss levels. As particle sizes increase, the gloss level drops. You can fine-tune of gloss levels in powder coating through the choice of fillers, such as barium sulphate and ATH (aluminium trihydrate).

Use cutting compound to remove the powder coating down to the level at the bottom of the scratch. A fine rubbing down paper may speed up the process (800 to 400 grit, no coarser), but the job will need to be finished with cutting compound to remove the fine scratches left by the rubbing down paper.

It May Dry Out Your Skin

Prolonged or regular use of talcum powder can actually reduce the production of natural oils in the skin(essential oils buying guide). This, in turn, would make the skin dry and could lead to problems like flaky skin and more sensitive skin altogether.

Powder Coating Coverage Formula

Assumption: The Powder Coating Industry standard is 192.3 square feet of coverage per pound of powder. This pound of powder would be at 1.0 specific gravity and applied at a thickness of 1 mil with 100% transfer efficiency.

Health Hazards in the Powder Coating Process

The majority of powders can result in health effects with significant exposure. Common problems include skin irritation (dermatitis), sensitization of the skin, respiratory irritation, and occupational asthma.

Powder coatings can be damaged by harsh solvents. A number of commercial cleaning products can cause damage to these types of finishes. Once the finish has become damaged, it is much more vulnerable to fading, staining and failure of the finish itself.

“Apply a small amount of matte powder to a powder brush and instead of buffing it in, lightly press it into areas that need mattifying,” she says. And there you have it — mattified but cake-free.

Apply Powder Only Where Necessary

Easily the most common cause of a cakey foundation is using too much powder to set your face. Whether you are using pressed or loose powder, be mindful of how much you apply.

Which is better loose powder or compact?

If you are looking to ace that no-makeup makeup look or attempting a quick touch-up on the go, a compact powder will surely come in handy. Loose powders on the other hand contain lesser oils, are powdery in texture and generally used for setting your makeup or adding a finishing touch to it.