CM352 corrosion inhibitor — overview and suggested technical text
CM352 is a commercial corrosion inhibitor formulation used to protect metal surfaces in industrial and oilfield environments. Below is concise, general-purpose technical copy you can adapt for product literature, safety data sheets, or specification documents.
Product description CM352 is a liquid amine-based corrosion inhibitor designed for use in circulating cooling systems, production tubing, pipelines, and downhole applications. It forms a thin, adsorbed protective film on ferrous and non-ferrous metals to reduce electrochemical attack and inhibit pitting and general corrosion.
Key features and benefits
Typical applications
Performance and dosage
Compatibility and materials considerations
Handling, storage, and safety
Testing and monitoring
Regulatory and environmental notes
Suggested specification language (short) "CM352 is an amine-based, film-forming corrosion inhibitor formulated for protection of ferrous and non-ferrous metals in oilfield and industrial aqueous/hydrocarbon systems. It is effective at low ppm dosing, thermally stable up to typical field temperatures, and compatible with common production chemicals. Minimum effective concentration shall be determined by site-specific testing."
If you want this tailored to a specific use case (pipeline, downhole, cooling tower), a different tone (marketing vs. SDS), or need an editable Word/HTML version, tell me which and I’ll adapt it. cm352 corrosion inhibitor
Before providing a detailed article, could you clarify which CM352 corrosion inhibitor you are interested in? 1. Aviation Maintenance (Hartzell Propeller)
In the aviation industry, CM352 is a specific code for a corrosion inhibitor used in the maintenance of Hartzell propellers. It is a consumable material applied during inspections and repairs to protect critical components like: Counterweight bolts and bolt wells. Staking pins and mounting bolt recesses.
Other exposed propeller surfaces after cleaning with solvents. 2. Marine & Industrial Operations
In older industrial contexts (such as the Frigg gas field operations), CM352 has been documented as a corrosion inhibitor used for passivating tanks and scrubbers. This application typically involves: Protection of suction scrubbers and fuel gas scrubbers.
Maintenance of produced water degassing tanks and deaerator towers. 3. Medical/Biochemical Research
There is also a biochemical compound known as CM-352, which is a matrix metalloproteinase (MMP) inhibitor used in medical research, specifically for treating issues like intracranial hemorrhage or as a hemostatic agent.
CM352 is a specialized corrosion inhibitor specified by Hartzell Propeller for maintaining aircraft propeller counterweights. It is referenced under the Consumable Materials chapter of the Hartzell Propeller Standard Practices Manual 202A.
Below is a technical summary report regarding its function, application, and compliance based on official aviation service documents. 🛠️ Technical Report: Corrosion Inhibitor CM352 1. Purpose & Function
Primary Use: Prevents oxidation and environmental corrosion on heavy steel counterweights attached to propeller blades.
Mechanism: It creates a dedicated protective barrier to guard the bare metal components against atmospheric moisture and harsh chemical exposure.
Target Areas: Heavily focused on the mounting bolt recesses, bolt heads, spring pins, and bolt wells of the counterweight assemblies. 2. Application & Curing Process Typical applications
According to official service instructions (such as those in Hartzell Service Letter HC-SL-61-364):
Method: The liquid or aerosol inhibitor is sprayed into a separate container and then applied directly to the parts using a soft-bristled brush.
Coverage: It must completely cover the bolt heads, spring pins, and bolt wells. It can also optionally be brushed over all exposed surfaces of the counterweight.
Curing Time: The treated assembly must cure for a minimum of 3 hours before the aircraft is cleared for flight. 3. Critical Safety Precautions
⚠️ De-Ice Protection Conflict: Maintenance personnel are strictly cautioned NOT to apply CM352 onto any ice protection system components. This includes terminal strips, de-ice boots, and wire harnesses, as the chemical can degrade the materials.
Pre-application Cleaning: If existing rust or corrosion is found on the counterweight during inspections, it must be cleaned first using Stoddard solvent (CM23) and an abrasive pad (CM47) prior to applying CM352. 4. Maintenance Intervals
Regular Application: Hartzell Propeller recommends applying or reapplying CM352 at regularly scheduled intervals. This generally aligns with the standard lubrication schedule outlined in the specific propeller model’s owner's manual.
Severe Environments: Agricultural spraying and fire-fighting aircraft are subjected to aggressive chemical environments and require strict adherence to these anti-corrosion applications to avoid structural failures. HC-ASB-61-406, Original - Hartzell Propeller
CM352 is a Hartzell Propeller part number for a specialized corrosion inhibitor
. It is primarily used to protect bolt-on steel counterweights and mounting hardware on various propeller models from oxidation and environmental degradation. Purpose and Application Protection
: Applied to prevent corrosion on steel counterweights, which are critical for the mechanical balance and operation of the propeller assembly. Target Areas : Specific application points include bolt heads spring pins bolt wells Service Intervals oil and gas extraction
: Hartzell recommends re-applying CM352 at regularly scheduled maintenance intervals, typically aligned with the lubrication schedule found in the Propeller Owner’s Manuals Application Instructions For detailed procedures, technicians should refer to Hartzell Service Letter HC-SL-61-364 Standard Practices Manual 202A Preparation
: Clean surfaces using a solvent like Stoddard solvent (CM23) and an abrasive pad if existing corrosion is present.
: Spray the inhibitor into a small container and apply it precisely with a soft-bristled brush : The material must cure for a minimum of three hours before flight. Safety and Cautions Ice Protection Hazard Do not apply
CM352 to de-ice/ice protection components such as terminal strips, boots, or harnesses, as it may damage these systems.
: According to safety standards, avoid skin and eye contact. Use safety glasses and resistant gloves during application.
: Keep the container tightly closed in a cool, well-ventilated area away from heat or open flames. Hartzell Recommended Service Facility near you to assist with this application? Hartzell Propeller Counterweight Bolt Update | PDF | Screw
Refer to Figure 3. * Be sure the bolt heads, spring pins, and bolt wells are completely. covered with corrosion inhibitor CM352. * HC-SL-61-364 - SERVICE LETTER
When the protected part needs to be painted, welded, or serviced, remove the film as follows:
CM352 is a mixed-type inhibitor (affects both anodic and cathodic reactions). Its mode of operation involves:
In the demanding world of industrial maintenance, oil and gas extraction, and water treatment, corrosion is the silent enemy. It eats away at profit margins, jeopardizes structural integrity, and leads to catastrophic failures. Among the vast arsenal of anti-corrosion technologies, one name consistently stands out for its versatility and high-performance chemistry: CM352 corrosion inhibitor.
This comprehensive guide explores everything you need to know about CM352—from its chemical mechanism and key applications to safety data and comparative advantages over traditional inhibitors.
CM352 is versatile and utilized in various upstream and midstream scenarios: