One of the challenges of metals protection is finding a rust preventative that does not need to be cleaned off before welding. The concern is that surface contaminants can affect weld quality, and rust preventative chemicals may give off potentially dangerous fumes. Cortec (St. Paul) announces that its VpCI-325 is approved for use as a weldable rust inhibitor on threaded holes and joint abutments at a name-recognizable equipment manufacturer.
VpCI-325 is a ready-to-use vegetable-oil/solvent-based liquid for general purpose corrosion protection in a wide variety of applications. The product leaves a tenacious oily film that clings to metal surfaces and offers complete water displacement. It also contains corrosion inhibitors for protection against rust in the presence of high relative humidity, chlorides, H2S and sulfur compounds. VpCI-325 can be used to protect ferrous metals, galvanized steel, aluminum, brass, copper, babbitt, zinc, cadmium and silver.