VpCI-368 Corrosion-Inhibiting Coating

January 09,2017
VpCI-368 Corrosion-Inhibiting Coating

Cortec’s VpCI-368 coating has just become more powerful with the addition of extra vapor-phase corrosion inhibitors. Already, VpCI-368 provides excellent protection to metal substrates exposed to harsh outdoor conditions.

The dark brown viscous liquid dries into a firm moisture-displacing wax-like film that can be removed by mineral spirits or alkaline cleaners such as Cortec VpCI-414. The film can be used for a variety of applications where heavy-duty corrosion protection is needed:
• Pipe coating
• Parts storage
• Underbody coating
• Wire rope
• Steel plate
• Machined parts

VpCI-368 has an extensive record of use for mothballing and layup of equipment, protection of shipments, and preservation of spares. Now, VpCI-368 EVP (Extra Vapor Protection) is also available for application in complex, sealed
spaces where a greater concentration of vapor inhibitor is beneficial. The extra dose of Cortec VpCI vaporizes from the coating, fills the enclosed space, and adsorbs on difficult-to-reach surfaces. This is helpful on applications such as pipe internals where it is challenging to thoroughly cover all metal substrates.

VpCI-368 EVP coating is flexible and offers excellent outdoor protection that is much easier to handle and remove than traditional wax-based coatings commonly used in military and similar applications. VpCI-368 EVP is UV resistant and passes 900-1,500 hours of ASTM B-117 intense salt spray testing applied at 2-3 mils on carbon steel. It also provides multi-metal protection on stainless steel, copper, aluminum and cast iron. The cured film is heat stable up to 392° F (200° C) and is commercially equivalent to MIL-PRF-16173E (Grades 1 and 2). It can be applied by spray or brush.


Cortec’s VpCI-368 EVP can be used for a variety of applications where heavy-duty corrosion protection is needed.
VpCI-368 EVP is classified as NATO 6850-66-132-5848, NATO 6850-66-132-6099, NSN 8030-00-062-6950, NSN 8030-00-231-2345, NSN 8030-00-244-1300, and NSN 8030-01-470-2601. Cortec’s VpCI-368 EVP conforms to the following test methods: ASTM D-1735 (Water Fog Cabinet), ASTM D-1748 (Humidity Cabinet), ASTM B-117 (Salt Fog Cabinet), ASTM D3690 (VOC), ASTM D522 (Flexibility), MIL-PRF-16173E (Grade 2), NACE (Minimum Surface Preparation Guideline), NACE RP0487-2000 (Selection of Rust Preventives), and SSPC (Minimum Surface Preparation Guideline).