: For best results, surfaces should be cleaned first using a solvent like Stoddard solvent (CM23) and an abrasive pad.
Before introducing CM352, the system must be cleaned. Use an alkaline cleaner (like trisodium phosphate) to remove existing grease and loose rust. If heavy scale (calcium carbonate) is present, follow with a mild acid flush. Never inject CM352 into a dirty system —it will coat the dirt, not the metal.
: CM352 should not come into contact with propeller de-icing equipment. Do Not Use Blades to Turn corrosion inhibitor cm352
As a corrosion inhibitor, CM352 works by creating a thin, protective barrier on the metal surface. This barrier prevents corrosive agents—such as moisture, salt, and oxygen—from reacting with the steel.
Stagnant water in fire lines breeds microbiologically influenced corrosion (MIC). CM352 includes a biostatic agent that suppresses sulfate-reducing bacteria (SRB). : For best results, surfaces should be cleaned
When metal is immersed in water containing dissolved oxygen, electrochemical cells form. The anode releases metal ions (oxidation), and the cathode consumes electrons (reduction).
: Recommended for re-application during routine inspections or whenever corrosion is detected on surfaces like staking pins, mounting bolt recesses, or general counterweight bodies. If heavy scale (calcium carbonate) is present, follow
While CM352 is the specific designation in Hartzell documentation, it is often categorized with other high-performance aerospace inhibitors such as: Ardrox AV30
I’ve been using CM352 for about 6 months in a closed-loop HVAC system and for protecting idle metal parts in a humid warehouse. Here’s my honest take.
For a system that has been corroding: