Powder coating gives parts a tough, smooth finish that holds up well in tough environments. It protects better and cures faster than traditional wet paint. Still, good results depend on how the powder is stored and handled. If moisture or contaminants get in, the finish can be affected before coating even starts.
If powder is not stored properly, it can break down, leading to poor application, weak sticking, and surface flaws. These problems can make products wear out faster, require more rework, and lead to customer complaints or warranty issues.
To help avoid these risks, Consolidated Metal Technologies highlights the key moisture and contaminant controls OEMs should look for in a powder coating partner.
Common Sources of Moisture and Contamination
Environmental conditions are important for powder coating results.
If temperatures go outside the recommended 65°F to 80°F range, it can affect how the powder flows and cures. Too much heat can cause the powder to melt too soon or cure too much, leading to problems like orange peel texture, pinholes, or uneven coating thickness.
Humidity also matters. Powder coatings work best when the relative humidity is between 40-60%. As humidity increases, the powder can absorb moisture, leading to clumping and making it harder to apply evenly.
Environmental Controls After Curing
Good powder coating vendors use controlled environments to protect both the powder and the coated parts. They maintain steady temperatures and manage humidity with specialized systems. Sensors help them monitor conditions and make changes before problems arise.
Powder should be kept in airtight containers in temperature-controlled areas to keep moisture and prevent it from breaking down. In closed workspaces, air systems help maintain steady airflow, temperature, and humidity. Regular testing helps catch problems early and keeps the coating process consistent.
Read Our Blog: Process, Benefits, and Application of Powder Coating
Handling and Storage Risks
Even with controlled conditions, poor handling can still cause contamination. If containers are left open, powder is exposed during transfers, or materials are mixed between jobs; the powder quality can drop quickly. Without careful handling, coatings can lose quality before they are even applied.
To lower these risks, good vendors use careful storage methods.
They keep storage areas climate-controlled, use sealed containers, label everything clearly, and use FIFO (first in, first out) inventory to keep materials fresh and avoid mixing colors or formulas.
Contaminant Control During Application
Moisture and contamination risks continue during the coating process. Clean, closed spray booths and filtered air help keep dust and other particles out. Equipment should be cleaned thoroughly between color changes, and powder should be handled carefully from storage to application to maintain consistent results. Contamination is controlled throughout the process.
Read Our Blog: Top Industrial Coating Defects and How to Prevent Them
What Key Questions Should You Ask Your Vendor?
- How is powder stored and protected from moisture?
- What temperature and humidity controls are in place?
- How do you prevent cross-contamination between jobs?
- What quality checks occur before and after coating?
Consolidated Metal Technologies: Our Approach to Quality Control
At Consolidated Metal Technologies, we control moisture and contaminants at every step of the powder coating process. With controlled environments, careful procedures, and skilled staff, CMT provides precise coatings, consistent quality, and on-time delivery.
Quality powder coating begins long before the application. Good storage, careful handling, and the right environment to protect your product, your schedule, and your reputation.
If you are looking for powder coating services or want to learn more about how your finishes are managed, contact Consolidated Metal Technologies to discuss your project.
