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Technical Q&A

Why is my VOC number high when we’re already using low-VOC chemistry?

The short answer

VOC-per-gallon doesn’t determine what your plant actually emits. Usage does.

Low-VOC labels look compliant on paper, but total VOC load in HVAC and automotive manufacturing comes from how the chemistry behaves once the line is running. If a forming lubricant or brazing fluid requires higher concentrations, drifts faster, or leaves residue that forces extra cleanups and tank dumps, total emissions climb even when the SDS says “low-VOC.”

At CPI, our goal isn’t just low-VOC formulations. It’s low total VOC output. That comes from chemistries that burn off cleanly, stay stable across shifts, minimize residue, and perform consistently at lower usage rates. When the process uses less chemistry, emissions fall, regardless of VOC-per-gallon.

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Related Questions

Why does phosphate pretreatment create compliance headaches?

Phosphate pretreatment creates compliance work in four places: phosphorus in the wastewater, regulated metals like zinc and nickel, sludge that has to be characterized and hauled, and the water used by multistage rinses. The cost is spread across water bills, waste hauling, permits and staff time.

Why do parts flash rust between stages, and how do I stop it?

Flash rust is rapid oxidation that forms on bare steel when iron, oxygen and water meet, sometimes within minutes. It usually comes from one of five causes: parts drying mid-process, high washer temperatures, water impurities, acidic pH or uneven chemical coverage. Start by checking whether parts dry between stages, then look at water, pH and spray pattern.

How does zirconium prevent sludge in the bath?

Phosphate baths form crystals that drop insoluble solids, which build up as sludge on tank floors, heating elements and nozzles. Zirconium pretreatment forms a thin nanoceramic oxide layer on the part and produces no heavy sludge. That means fewer boil-outs, less nozzle scale and lower waste hauling costs.
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