Nalco 93033 -
Q: Can I use Nalco 93033 in a closed-loop chilled water system?
A: Not ideally. Closed loops require higher levels of nitrite or molybdate. Nalco 2000 series is better suited for closed systems.
Q: Does Nalco 93033 contain heavy metals?
A: No. It is zinc-free and chromium-free, making it safer for discharge and less prone to causing brass dezincification.
Q: How do I test for Nalco 93033 concentration in water?
A: Use a phosphate test kit (Hach or equivalent) to measure orthophosphate. Multiply the PO₄ reading by a factor (typically 6–10) to estimate product ppm. Confirm factor with your Nalco representative. nalco 93033
Q: Is Nalco 93033 the same as Nalco 93032?
A: No. Nalco 93032 is a higher-concentration variant for closed-loop systems. Always verify the product label.
Plastics, automotive parts, and metal stamping facilities rely on Nalco 93033 to maintain consistent cooling in injection molding machines and hydraulic oil coolers. Q: Can I use Nalco 93033 in a
Nalco 93033 performs best in waters with moderate alkalinity (50-200 ppm as CaCO₃). Extremely soft water (<30 ppm hardness) may require a calcium supplement to form the protective phosphate film. Extremely high hardness (>800 ppm) may overwhelm the phosphonate, requiring scale inhibitor augmentation.
Hardness ions (calcium and magnesium) precipitate at high temperatures, forming calcium carbonate scale. Scale acts as an insulator, reducing heat transfer efficiency by up to 40%. The phosphonates in Nalco 93033 perform threshold inhibition—they keep calcium ions soluble at supersaturated levels. Meanwhile, the acrylic copolymer distorts the crystal structure of any precipitating salt, creating "mud" that remains suspended and can be removed via blowdown rather than adhering to pipes. Nalco 2000 series is better suited for closed systems
Cause: Copper corrosion; insufficient azole concentration. Solution: Add a supplemental copper inhibitor (e.g., tolyltriazole) or check if Nalco 93033 is degraded by excessive chlorine.
Important: The following are general guidelines. Always perform a thorough system analysis and follow the specific Nalco Water Service Bulletin for your facility.
Nalco 93033 is most commonly used in:
A: Yes, but it is overkill. Closed loops require less corrosion inhibitor. Nalco offers specific closed-loop products like Nalco 2000 series. However, 93033 works if you already have it on hand.
