If you've ever had aluminum parts held up in a queue behind multiple batches of steel components, you already know the frustration of finding your project stuck in a bottleneck. You need a reliable, readily-available powder coater specializing in aluminum parts.
Your powder coater can’t just swap back and forth between steel and aluminum part runs, unless you’re fine with subpar results. Aluminum parts require a specific pretreatment chemistry, careful handling considerations, and ideally, a dedicated coating environment to get the best possible finish.
That's what originally led us to build our aluminum-only powder coating line. With the demand for aluminum parts being higher than ever, and coating supply chains still being a struggle throughout North America, our dedicated aluminum line has turned out to be one of the things our customers tell us they value most about working with Winona.
On a mixed-metal line, aluminum parts have to wait their turn. Steel, iron, and mixed-alloy components all flow through the same conveyor, the same pretreatment tanks, the same oven. That creates scheduling conflicts, and more often than not, aluminum gets bumped because it disrupts the chemistry or flow for everything else.
Our aluminum-only line eliminates that problem entirely. Aluminum parts move on their own dedicated schedule, on a line optimized specifically for aluminum processing. Especially if you have a high-volume aluminum program and/or tight lead time requirements, Winona offers your project the throughput reliability that other coaters simply cannot match.
It often comes as a surprise to industry newcomers, but different types of metal can contaminate each other. In fact, ferrous contamination is one of the most common causes of coating issues on aluminum parts due to most coating shops not having a dedicated line.
Iron particles from steel parts processed on the same line will embed in aluminum substrates and cause corrosion, adhesion failures, and aesthetic defects that show up weeks or months down the road.
On a mixed line, even with exceptional cleaning and prep, the risk of bi-metal contamination is always there. On our aluminum-only line, that risk simply doesn't exist. No ferrous metals ever touch our aluminum pretreatment system, our racks, or our oven.
Speaking of aluminum-only pretreatment, learn more in our previous blog: Line One: Aluminum-Only Pretreatment for Superior Powder Coating Adhesion and Performance
Architectural powder coating has some of the strictest performance requirements in the industry. AAMA specifications exist for a reason: architectural aluminum is exposed to UV, moisture, temperature swings, and mechanical wear for decades. The coating has to hold up, and that starts long before the powder ever hits the part.
Our aluminum-only line is purpose-built for the consistency those standards demand. Controlled pretreatment chemistry, no contamination variables, and process parameters dialed in specifically for aluminum mean we can hit those specs reliably, batch after batch.
Aluminum extrusions present their own set of challenges: complex cross-sections, tight tolerances, and surface finish requirements that leave no room for runs, sags, or uneven buildup. Getting consistent film thickness across the entire profile requires a controlled process from start to finish.
Because our line was designed specifically around aluminum extrusion geometry and handling, we've optimized every stage for that substrate. Parts are racked to maximize coverage, pretreatment is calibrated for the alloys we see most commonly, and cure parameters are set to deliver a uniform finish without the variables that come from processing aluminum alongside dissimilar metals.
The electric vehicle (EV) industry is driving a massive surge in demand for coated aluminum components like battery enclosures, thermal management housings, structural brackets, and more. EV parts often carry functional coating requirements beyond aesthetics: chemical resistance, thermal performance, and long-term durability in demanding under-hood or under-chassis environments.
We know that EV manufacturers and their Tier 1 suppliers can't afford coating failures. Our aluminum-only line gives them a controlled, contamination-free environment that meets those functional performance standards while scaling to the production volumes the industry requires. It's one of the reasons EV-related work has become a growing segment of what we do here.
Winona’s dedicated powder coating line simply offers a better way of processing aluminum that yields higher quality, more consistent results. No waiting behind steel. No bi-metal contamination risk. No compromises in chemistry or process parameters.
If you're sourcing powder coating for aluminum components and you've dealt with delays, inconsistencies, or coating failures at other shops, we'd be happy to walk you through our process and talk through what we can do for your specific application.