CM352 is a commercial-grade, multi-metal corrosion inhibitor formulated primarily for closed-loop cooling systems, process water circuits, and metalworking fluids. It is engineered to provide long-term protection by establishing a resilient microscopic barrier on metal surfaces. This barrier prevents oxygen, water, and corrosive ions (such as chlorides and sulfates) from reacting with the substrate. Key Physical and Chemical Properties
CM352 is an industrial chemical blend and should be handled with appropriate Personal Protective Equipment (PPE), including chemical splash goggles, impervious gloves, and protective clothing. In case of skin or eye contact, immediate flushing with clean water is required.
, the inhibitor is integrated into several maintenance phases: Factory Application:
is a specialized corrosion inhibitor primarily used in the maintenance and assembly of aviation propellers , most notably those manufactured by Hartzell Propeller Inc. cm352 corrosion inhibitor
| Industry | Environment | Typical Dosage | Efficacy Target | |----------|-------------|----------------|------------------| | | 15% HCl, 60–90°C | 0.1–0.5% v/v | Corrosion rate < 0.05 lb/ft² (NACE TM0374) | | Heat exchanger cleaning | 5–10% H₂SO₄, 50°C | 200–500 ppm | Reduce rate from 2000 mpy to <20 mpy | | Cooling water systems | Chlorinated freshwater, pH 7–8.5 | 30–50 ppm | Protection against pitting and MIC | | Sour gas pipelines | 100–1000 ppm H₂S, brine | 50–150 ppm | Prevent HIC (hydrogen-induced cracking) | | Pickling baths | 10–20% HCl, 25–40°C | 0.05–0.2% | Reduced acid consumption, smooth surface |
Hydronic heating systems (hot water boilers) and chilled water loops are prone to dissolved oxygen ingress. CM352 excels here because it tolerates stagnant conditions. Typical dosage rates range from 500 to 1500 ppm, depending on water hardness and system age.
Protecting against atmospheric corrosion and oxygen-induced corrosion. Key Physical and Chemical Properties CM352 is an
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Case example (illustrative) A mid-sized industrial evaporative cooling system experiencing seasonal pitting was treated with CM352 at a continuous feed of 150 ppm after a one-time 500 ppm recondition dose. Within 30 days, corrosion probe rates fell from 0.12 mm/y to 0.03 mm/y; visual inspection showed reduced under-deposit attack and extended run-times between maintenance cycles.
| Problem | Likely Cause | Solution | | :--- | :--- | :--- | | High iron counts despite adequate dosage | Biofilm under-deposit corrosion | Conduct a biocide shock (non-oxidizing) and then re-passivate with CM352. | | Copper pitting | Low azole concentration | Test tolyltriazole levels; supplement with a dedicated copper inhibitor if below 10 ppm. | | White rust on aluminum | pH > 9.5 | Reduce alkalinity via acid feed (sulfuric or CO2). | | Foaming in cooling tower | Overdose >2000 ppm | Reduce feed rate; add a low-silicone antifoam. | | Industry | Environment | Typical Dosage |
CM352 is most frequently referenced in technical service documents for high-performance aircraft components:
Test active chemical levels using dedicated test kits to ensure concentrations stay within the recommended parts-per-million (ppm) range.
In the upstream and midstream sectors, pipelines carry a harsh mixture of hydrocarbons, produced water, carbon dioxide ( CO2cap C cap O sub 2 ), and hydrogen sulfide ( H2Scap H sub 2 cap S
CM352 Corrosion Inhibitor: The Comprehensive Guide to Industrial Asset Protection