Cm352 Corrosion Inhibitor [exclusive] Now
When compared to the high cost of piping failures and heat exchanger replacement, the cost of implementing a chemical inhibitor program is relatively low. Best Practices for Application
| 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. |
CM352 is a highly controlled compound regulated by strict aerospace standards. Fleet managers and mechanics should keep the following sourcing requirements in mind: HC-SL-61-364 - SERVICE LETTER cm352 corrosion inhibitor
: Applied as a surface coating during initial assembly and as part of ongoing maintenance protocols. Industrial Significance
After passivation, reduce feed to maintain a residual concentration of of active CM352. Use a simple test kit (typically a colorimetric drop test for the proprietary amine) to verify levels twice per week. When compared to the high cost of piping
: The tight side walls of counterweight mounting bolt recesses trap ambient moisture easily. Maintenance protocols require coating these recesses to eliminate localized pitting.
Understanding CM352: The Critical Barrier for Aircraft Propeller Protection | | White rust on aluminum | pH > 9
Upon introduction into an aqueous system, CM352 rapidly migrates to the anode sites on the metal surface (where oxidation and metal loss occur). The polar heads of the inhibitor molecules adsorb onto the metal lattice, forming a durable, monomolecular film. This film increases the electrical resistance of the anode, effectively halting the dissolution of metal ions into the water.
: It is a locally procured consumable material used by Hartzell Propeller Inc. and its authorized service centers.
CM352 is a liquid, multi-metal corrosion inhibitor designed specifically for closed-loop water systems. Unlike treatments for cooling towers (which are open to the atmosphere), closed loops—like chilled water systems, heating hot water loops, and engine jacket water circuits—have unique challenges.
It is very important to use a soft-bristled brush, as a hard or metallic brush could damage the surfaces or the compound itself. Also, only use the specific CM352 specified; substitute products are not approved by Hartzell for this purpose.
