Cortec M-235

Product Description

M-235 is a proven corrosion inhibitor for copper, copper-based alloys and other yellow metals. M-235 functions by reacting with surface copper oxides to form a strong, insoluble polymeric complex. This complex creates a thin layer or film on metal surfaces that provides both a mechanical and electrochemical barrier against corrosive attack. This protective layer has a high degree of thermal and oxidative stability and cannot be easily removed. M-235 complexes yellow metal ions in solution, thereby preventing galvanic corrosion of other metals in contact with copper. M-235 has solubility in some water and organic systems.

Suggested Uses

M-235 can be used in many applications for protection of yellow metals.

• Direct treatment on rolled copper or brass sheets and coils  
• Circulating cooling systems such as cooling towers and air conditioning systems  
• Functional fluids such as hydraulic fluids, specialty lubricants, automotive coolants and metalworking fluids  
• Wrapping paper and box board for wrapping, interleaving, shipping and storing copper and brass items  
• Corrosion protective coatings such as lacquers and waxes  
• Cleaners such as soaps, detergents and strong alkali or acid cleaners  
• Fabricated products made from copper and brass  
• Artifacts, sculptures and decoration items

Dosage

M-235 has an almost neutral pH when incorporated into liquids at a concentration between 0.1 and 2.0%. Liquids may be either aqueous or non-aqueous. It may also be used as a solid or vapor. For a specific recommendation please contact a Cortec representative

Packaging

M-235 is available in 5 pound (2.3 kg), 50 pound (23 kg), 100 pound (45 kg) fiber drums and bulk.