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.
Because the same water recirculates for years, you aren't constantly adding fresh oxygen. Instead, the risk is localized corrosion (pitting) and galvanic corrosion from mixed metals.
CM352 is formulated to handle exactly that.
A 30-story office building in Chicago had a 25-year-old chilled water loop. Every spring, they needed to re-pipe sections due to "pinhole elbow syndrome." They switched to CM352 in 2019. After two years, a borescope inspection showed the inside of the steel pipes looked cast-iron grey—passivated, not pitted. Estimated annual repair savings: $18,000. cm352 corrosion inhibitor
Subject: Analysis of Properties, Mechanism, and Application of CM352 Corrosion Inhibitor Date: October 26, 2023 Prepared For: Technical Operations / Engineering Management
CM352 is versatile, but it shines brightest in demanding sectors:
CM352 is widely applied in:
| Industry | Environment | Typical Dosage | Efficacy Target | |----------|-------------|----------------|------------------| | Oil & gas well acidizing | 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 |
(Note: Values may vary slightly by specific manufacturer formulation)
One of the biggest risks in corrosion management is using a product that protects steel but attacks plastics or soft metals. For example, many traditional inhibitors contain amines that cause "stress corrosion cracking" in brass or copper. CM352 is a liquid, multi-metal corrosion inhibitor designed
CM352 is uniquely formulated to be compatible with:
This broad compatibility makes CM352 the preferred choice for mixed-material assemblies, such as automotive engines or hydraulic systems.
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. This broad compatibility makes CM352 the preferred choice
